Material impurity removal device and battery material processing equipment

Abstract

A material impurity removal device comprises a shell (10) and a plurality of sets of adsorption pieces (200), the shell (10) is provided with a first wall (12) and a second wall (13) which are oppositely arranged, an inner cavity (11) allowing materials to flow is formed between the first wall (12) and the second wall (13), the adsorption pieces (200) are at least partially located in the inner cavity (11), and the adsorption pieces (200) are connected with the first wall (12) and extend in the direction of the second wall (13). And the flowing direction of the material is intersected with the extending direction of the adsorption piece (200). The utility model further provides battery material processing equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery processing, in particular to a material impurity removal device and a battery material processing equipment. BACKGROUND

[0002] In the process of battery processing, the battery pole piece needs to be coated with material. In the production process, the raw material of the material usually contains a certain amount of ferromagnetic impurities. When the ferromagnetic material is coated with the material to form the pole piece, it is easy to affect the safety performance of the pole piece and directly affect the quality of the lithium ion battery. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present application is to provide a material impurity removal device, which aims to solve the problem that the existing ferromagnetic impurities in the battery slurry affect the quality of the battery.

[0004] To achieve the above-mentioned purpose, the material impurity removal device provided by the present application is used to adsorb ferromagnetic impurities in the material, and the material impurity removal device comprises:

[0005] A housing having a first wall and a second wall arranged opposite to each other; an inner cavity is formed between the first wall and the second wall for the material to flow; and

[0006] An adsorption member located at least partially in the inner cavity; the adsorption member is connected with the first wall and extends towards the second wall; the flow direction of the material intersects with the extension direction of the adsorption member.

[0007] In the present example, an inner cavity for material flow is formed in the housing, so that the material can flow along a predetermined trajectory; the adsorption member is used to adsorb the ferromagnetic impurities in the slurry flowing through the inner cavity, so as to reduce the ferromagnetic impurities in the slurry, reduce the problem of self-discharge caused by ferromagnetic impurities in the battery product, and effectively improve the quality of the battery product. In the present example, the extension direction of the adsorption member is arranged at an angle with the flow direction of the material to increase the contact area of the material and the adsorption member, thereby improving the adsorption efficiency of the adsorption member to the ferromagnetic impurities.

[0008] In some examples, the number of adsorption members is multiple groups, and at least two groups of adsorption members are arranged at intervals along the flow direction of the material.

[0009] In the present example, multiple groups of adsorption members are arranged at intervals along the flow direction of the material, so that the material flows through multiple groups of adsorption members in sequence for adsorption and impurity removal during the flow process, effectively improving the impurity removal efficiency of the impurity removal device.

[0010] In some examples, at least two groups of adsorption members are arranged at intervals along the flow direction of the material.

[0011] At least two groups of the suction accessories in the example are arranged staggered with each other in the flow direction of the material, so that the flow direction of the material changes under the action of the staggered suction accessories during the flow of the material, thereby playing a turbulence effect on the material, so that the ferromagnetic impurities in the material can be more in contact with the suction accessories, so as to improve the adsorption effect of the suction accessories on the iron impurities in the material.

[0012] In some examples, the extension direction of the suction accessory is arranged perpendicular to the plane where the second wall is located.

[0013] By arranging the extension direction of the suction accessory perpendicular to the plane where the second wall is located, the suction accessory can be conveniently aligned and fixed; by using a magnetic needle perpendicular to the second wall, the stability of the suction accessory can also be improved.

[0014] In some examples, the suction accessory is detachably connected with the first wall.

[0015] By detachably connecting the suction accessory with the first wall, the suction accessory can be detached when needed, so as to facilitate cleaning or replacement of the suction accessory.

[0016] In some examples, the suction accessory includes a plurality of magnetic needles arranged at intervals in the first direction; the magnetic needles are connected with the first wall and arranged extending towards the second wall, and the flow direction of the material intersects with the first direction.

[0017] In the example, by arranging each suction accessory to include a plurality of magnetic needles arranged at intervals in the first direction, the magnetic needles can be used as the adsorption sites of the suction accessory, and by arranging the magnetic needles at intervals, the resistance generated during the movement of the material can be reduced, while the total area of the adsorption sites of the suction accessory is increased, thereby improving the adsorption effect of the material.

[0018] In some examples, the magnetic needles of at least two groups of the suction accessories are arranged staggered with each other in the flow direction of the material.

[0019] In the example, by arranging the magnetic needles of at least two groups of the suction accessories staggered with each other in the flow direction of the material, the material can contact more magnetic needles during the flow, thereby enabling the ferromagnetic impurities in the material to be more fully in contact with the magnetic needles.

[0020] In some examples, any two adjacent groups of the magnetic needles of the suction accessories are arranged to be at least partially staggered in the flow direction of the material. In the present example, any two adjacent groups of the magnetic needles of the suction accessories are arranged to be staggered in the flow direction of the material, so that the magnetic needles on the plurality of suction accessories can generate multiple turbulence effects on the material in the flow direction of the material, thereby enabling the material to be affected by the magnetic needles of the corresponding suction accessories when flowing through each suction accessory during the flow of the material, and thereby improving the contact probability of the material with the magnetic needles during the flow of the material, and effectively improving the adsorption efficiency of impurities.

[0021] In some examples, the material impurity removal device further comprises:

[0022] A detection mechanism arranged in the housing and configured to detect the adsorption amount of the ferromagnetic impurities on the magnetic needle.

[0023] In the present example, the detection mechanism is configured to detect the adsorption amount of the ferromagnetic impurities on the magnetic needle, so as to facilitate determining whether the magnetic needle needs to be cleaned or replaced according to actual conditions.

[0024] In some examples, the magnetic needle is arranged to extend in a vertical direction, the adsorption amount of the ferromagnetic impurities on the magnetic needle is the weight of the ferromagnetic impurities, and the detection mechanism is a weight detection assembly configured to detect the weight of the ferromagnetic impurities on the magnetic needle.

[0025] In the present example, the weight detection assembly is configured to detect the weight of the magnetic needle at a specific time and the initial weight of the magnetic needle, and by obtaining the weight difference, the weight of the ferromagnetic impurities attached to the magnetic needle can be obtained, thereby facilitating real-time understanding of the use of the magnetic needle according to needs, and thereby facilitating determination of whether the magnetic needle needs to be cleaned.

[0026] In some examples, the weight detection assembly is arranged at the lower end of the magnetic needle, or the weight detection assembly is in the form of a ring-shaped body and is arranged around the magnetic needle.

[0027] The weight detection assembly bears the weight of the magnetic needle, and thereby can detect the real-time weight of the magnetic needle.

[0028] In some examples, the adsorption amount of the ferromagnetic impurities on the magnetic needle is the enrichment degree of the ferromagnetic impurities, and the detection mechanism is a magnetic field detection assembly configured to detect the enrichment degree of the ferromagnetic impurities on the magnetic needle under a corresponding magnetic field intensity.

[0029] By detecting the magnetic field of the magnetic needle, the enrichment degree of the ferromagnetic impurities under the corresponding magnetic field intensity can be calculated by the magnetic field, and thereby the amount of the ferromagnetic impurities attached to the magnetic needle can be indirectly calculated.

[0030] In some examples, the end of the magnetic needle away from the first wall is fixedly connected with the second wall.

[0031] In the example, the lower end of the magnetic needle is fixed on the second wall, so that the two ends of the magnetic needle are respectively limited and fixed by the shell, thereby preventing the magnetic needle from being deviated by the action of the material.

[0032] In some examples, the second wall is provided with a fixing member, and a positioning groove is formed in the fixing member, and the magnetic needle is inserted into the positioning groove.

[0033] The fixing member is used to connect the magnetic needle and the second wall to each other, so that the magnetic needle can maintain a predetermined state, thereby facilitating the fixation of the magnetic needle. By providing the positioning groove on the fixing member, the magnetic needle can be easily limited, thereby preventing the magnetic needle from being displaced, and the magnetic needle can be easily disassembled.

[0034] In some examples, each magnetic needle of the suction accessory is detachably connected with the first wall.

[0035] By detachably connecting each magnetic needle of the suction accessory with the first wall, each magnetic needle can be disassembled, thereby facilitating the cleaning or replacement of a single magnetic needle.

[0036] In some examples, the first wall is provided with a mounting hole, and the magnetic needle is inserted into the mounting hole.

[0037] By providing the mounting hole, the magnetic needle can be easily inserted into the mounting hole to limit the magnetic needle.

[0038] In some examples, the magnetic needle is in sealed connection with the mounting hole.

[0039] When the sealing member seals the mounting hole, the magnetic needle is at least partially inserted into the inner cavity, and the sealing cavity seals the mounting hole, thereby achieving the sealing of the shell.

[0040] In some examples, the maximum outer diameter of the magnetic needle is not less than 1 mm and not more than 100 mm. The outer diameter of the magnetic needle is relatively small, thereby the density of the magnetic needle can be increased to improve the adsorption efficiency. By making the maximum outer diameter of the magnetic needle not less than 1 mm, the magnetic needle can be prevented from being broken under the action of the material.

[0041] In some examples, the distance between adjacent magnetic needles is not less than 1 mm and not more than 100 mm. By limiting the distance between adjacent magnetic needles, the flow rate of the material in the shell can be easily controlled, and the density of the magnetic needle can be ensured, thereby realizing the removal of impurities in the material while ensuring the normal conveying of the material.

[0042] In some examples, the shell further comprises a third wall and a fourth wall arranged oppositely; the first wall, the third wall, the second wall and the fourth wall are sequentially connected and surround to form the inner cavity.

[0043] By forming the inner cavity in the shape of a cuboid, the magnetic needles arranged in a matrix can be arranged in the inner cavity, and then the corresponding magnetic needles can be uniformly distributed on the material flow path, so that the flow rate of the material flow is relatively controllable, and the impurity removal efficiency can be improved.

[0044] In some examples, the third wall is detachably connected with the first wall; and / or

[0045] The fourth wall is detachably connected with the first wall.

[0046] In this example, the first wall can be conveniently detached as a whole when needed, and then the suction accessory can be simultaneously detached for cleaning or replacement.

[0047] In some examples, the material impurity removal device further comprises:

[0048] The feeding pipe is connected with the shell, and the feeding pipe is formed with a feeding passage communicating with the inner cavity; in a planar projection of the feeding pipe and the shell in a direction perpendicular to the material flow, a projection of the feeding passage falls within a projection of an inner wall surface of the inner cavity.

[0049] In the direction perpendicular to the material flow, the projection of the feeding passage falls within the projection of the inner wall surface of the inner cavity, and the cross-sectional area at any position in the extension direction of the feeding passage is smaller than the cross-sectional area of the inner cavity. Since the cross-sectional area of the feeding passage is smaller than the cross-sectional area of the inner cavity, the amount of material flowing in the feeding passage per unit time is smaller than the amount of material that can flow in the inner cavity, so as to control the flow of material input into the inner cavity, so that the total volume of the material in the inner cavity is smaller than the total volume of the inner cavity, and then the material can be more fully contacted with the suction accessory, so as to improve the impurity removal efficiency of the material.

[0050] In some examples, the shell has an upper end and a lower end, the first wall is arranged close to the upper end of the shell, and the second wall is arranged close to the lower end of the shell; the feeding pipe has a first outer surface, the first outer surface is located on the same side of the shell as the first wall, and the outer surface of the first wall is arranged protruding relative to the first outer surface. In this example, by arranging the outer surface of the first wall protruding, the suction accessory can be conveniently disassembled when needed.

[0051] In some examples, the first wall and the second wall are oppositely arranged along a vertical direction, the first wall is arranged close to the upper end of the shell, and the second wall is arranged close to the lower end of the shell; the feeding pipe has a first inner surface, the first inner surface is located on the same side of the shell as the first wall, and along the vertical direction, the distance between the inner surface of the first wall and the second wall is greater than the distance between the first inner surface and the second wall.

[0052] Since the projection of the feeding channel falls into the projection of the inner wall surface of the inner cavity in the projection in the plane perpendicular to the material flow direction, the cross-sectional area at any position in the extension direction of the feeding channel is smaller than the cross-sectional area of the inner cavity, by providing that the outer surface of the first wall protrudes from the first outer surface of the feeding channel, there is a certain space between the side end surface of the first wall facing the inner cavity and the liquid surface of the material after a unit amount of material enters the inner cavity, thereby facilitating the control of the flow rate of the material, so that the material does not contact the part connected to the first wall of the suction accessory, to facilitate the disassembly of the suction accessory from the shell.

[0053] In some examples, the feeding pipe has a second outer surface, which is located on the same side of the shell as the second wall, and is flush with the outer surface of the second wall.

[0054] When the material impurity removal device is installed, the second surface of the feeding channel and the outer surface of the second wall are conveniently installed on the same platform, and the impurity removal device is conveniently kept on the preset plane.

[0055] In some examples, the material impurity removal device further comprises:

[0056] A first transition pipe is arranged between the feeding pipe and the shell, and a first transition channel is formed in the first transition pipe, and the feeding channel is connected to the inner cavity through the first transition channel.

[0057] The inner diameter of the first transition channel gradually increases in the flow direction of the material.

[0058] By adopting the first transition channel with gradually increasing inner diameter, the material can gradually diffuse when entering the inner cavity through the feeding channel, thereby facilitating the control of the flow rate of the material, and at the same time, the material can flow in a dispersed state towards the magnetic needle, which helps to improve the adsorption efficiency of the magnetic needle.

[0059] In some examples, the area ratio of the inner cavity to the feeding channel in the projection in the plane perpendicular to the material flow direction is not greater than 2 and not less than 1.5. The rate at which the material enters the inner cavity from the feeding channel affects the amount of material entering the inner cavity per unit time, and since the cross-sectional area at any position in the feeding channel affects the input rate of the material, by limiting the cross-sectional area ratio of the feeding channel to the inner cavity, the input rate of the material can be conveniently controlled, thereby controlling the total amount of material input into the inner cavity per unit time.

[0060] In some examples, the material impurity removal device further comprises:

[0061] A discharge pipe is connected to the shell, and the discharge pipe is formed with a discharge passage communicating with the inner cavity; in a planar projection of the discharge pipe and the shell in a direction perpendicular to the flow direction of the material, a projection of the discharge passage falls within a projection of an inner wall surface of the inner cavity.

[0062] By making the inner diameter of the discharge pipe smaller than the inner diameter of the inner cavity, the speed of the material output can be conveniently controlled, so that the material can be fully matched with the magnetic needle in the inner cavity to improve the adsorption efficiency of ferromagnetic impurities.

[0063] In some examples, the shell has an upper end and a lower end, the first wall is arranged close to the upper end of the shell, and the second wall is arranged close to the lower end of the shell; the discharge pipe has a third outer surface, the third outer surface is located on the same side of the shell as the first wall, and the outer surface of the first wall is arranged protruding relative to the third outer surface.

[0064] By making the outer surface of the first wall protrude from the third outer surface of the discharge passage, a certain space can be formed near the first wall of the inner cavity to facilitate the control of the flow of the material, and at the same time, the adsorption member can be conveniently detached from the shell.

[0065] In some examples, the discharge pipe has a fourth outer surface, the fourth outer surface is located on the same side of the shell as the second wall, and the fourth outer surface is flush with the outer surface of the second wall.

[0066] By making the lower end surface of the discharge pipe in the same plane as the second wall, the discharge pipe and the second wall can be conveniently arranged in the same plane, thereby facilitating the installation of the impurity removal device.

[0067] In some examples, the material impurity removal device further comprises:

[0068] A second transition pipe is arranged between the shell and the discharge pipe, and a second transition passage is formed in the second transition pipe, and the discharge passage communicates with the inner cavity through the second transition passage.

[0069] The inner diameter of the second transition passage is gradually reduced in the flow direction of the material.

[0070] By using the second transition passage arranged in a gradually reduced manner, the speed of the material output can be controlled, so that the material can be fully contacted with the magnetic needle in the inner cavity, thereby improving the impurity removal efficiency.

[0071] In some examples, the shell and the discharge pipe in a planar projection in a direction perpendicular to the material flow, the area ratio of the inner cavity to the discharge passage is not greater than 2, and not less than 1.5 the discharge pipe. Since the discharge passage is used to output the material, the cross-sectional area at any position of the discharge passage will affect the output rate of the material, by limiting the cross-sectional area ratio of the discharge passage to the inner cavity, the output rate of the material can be conveniently controlled, and then the residence time of the material in the inner cavity is controlled, so as to realize the control of the impurity removal time of the material.

[0072] On the basis of the above examples, the application further provides an example of a battery material processing equipment, which comprises the material impurity removal device according to any one of the above examples. BRIEF DESCRIPTION OF DRAWINGS

[0073] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some examples of the application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0074] Figure 1 FIG. 1 is a structural schematic diagram of an example of a material impurity removal device of the application;

[0075] Figure 2 FIG. 2 is a top view of the material impurity removal device of FIG. 1; Figure 1

[0076] Figure 3 FIG. 3 is a sectional view of FIG. 1 along the direction of 2a-2a; Figure 2

[0077] Figure 4 FIG. 4 is a right view of the material impurity removal device of FIG. 1; Figure 1

[0078] Figure 5 FIG. 5 is a left view of the material impurity removal device of FIG. 1; Figure 1

[0079] Figure 6 FIG. 6 is a structural schematic diagram of an example of the internal structure of the material impurity removal device of the application;

[0080] Figure 7 FIG. 7 is a structural schematic diagram of another example of the internal structure of the material impurity removal device of the application.

[0081] BRIEF DESCRIPTION OF DRAWINGS

[0082]

[0083]

[0084] ​​​​The objectives, functional features and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0085] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0086] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, motion condition, etc. between components in a certain posture (as shown in the drawings). If the certain posture changes, the directional indications also change accordingly.

[0087] In addition, if the embodiments of the present application involve descriptions of “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first”, “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0088] Batteries are widely used in energy storage power systems, electric vehicles, etc. The energy storage power systems include hydroelectric, wind power, thermal power, solar power and other power station energy storage systems. The electric vehicles include electric cars, electric motorcycles, electric bicycles and other electric vehicles. With the continuous expansion of the application field of batteries, the market demand is also increasing. Common battery-powered devices include mobile phones, portable devices, notebook computers, electric vehicles, electric vehicles, ships, spacecraft, electric toys and electric tools, etc.

[0089] Lithium battery is one of the common batteries. The lithium battery includes an electrode core formed by a positive electrode sheet, a negative electrode sheet and a separator. The existing lithium battery materials mainly include positive electrode materials, negative electrode materials, separators and electrolytes. Among the positive electrode materials, the most commonly used materials are lithium cobaltate, lithium manganate, lithium iron phosphate and ternary materials (nickel cobalt manganese polymer). Among the negative electrode materials, the current main materials are natural graphite and artificial graphite, in addition to nitrides, PAS, tin-based oxides, tin alloys, nano negative electrode materials and other intermetallic compounds. The negative electrode material, as one of the four components of the lithium battery, plays an important role in improving the capacity and cycle performance of the battery, and is a core link in the lithium battery industry. In the structure of the lithium battery, the separator is one of the key inner components. The separator material is mainly a polyolefin (Polyolefin) separator mainly composed of polyethylene (polyethylene, PE) and polypropylene (polypropylene, PP). The electrolyte is generally made of high-purity organic solvents, electrolyte lithium salts and additives. The electrolyte plays a role in conducting ions between the positive and negative electrodes of the lithium battery, and is a guarantee for the lithium ion battery to obtain high voltage and high specific energy.

[0090] During the processing of the electrode sheet, the material is often formed into a slurry, and the slurry is formed into a preset structure. For example, in the processing of the electrode sheet, the powder material can be processed into a slurry, and the electrode sheet is formed by coating the slurry. When the slurry contains ferromagnetic impurities, the battery is prone to self-discharge during operation. When the battery monomer produces self-discharge, it is easy to cause thermal runaway of the battery monomer, affecting the safe operation of the battery monomer.

[0091] The present application is directed to the problem that the existing battery slurry contains ferromagnetic impurities, which causes safety hazards in the processing of the battery monomer. A material impurity removal device for adsorbing ferromagnetic impurities in the material is provided. The extension direction of the adsorption member 200 used for adsorbing ferromagnetic impurities is arranged at an angle with the flow direction of the material, so as to increase the contact area between the material and the adsorption member 200, so that the adsorption member can be used to adsorb more ferromagnetic impurities in the material, so as to realize the effect of improving the quality of the battery monomer.

[0092] Please refer to Figure 1 , Figure 2 and Figure 3 In some examples, the material impurity removal device includes a housing 10 and an adsorption member 200, the housing 10 has a first wall 12 and a second wall 13 arranged opposite to each other; an inner cavity 11 for the flow of the material is formed between the first wall 12 and the second wall 13; the adsorption member 200 is at least partially located in the inner cavity, the adsorption member 200 is connected with the first wall and extends towards the second wall, and the flow direction of the material intersects with the first direction.

[0093] The housing 10 has a hollow cavity formed inside as the inner cavity 11, and has an input port and an output port communicating with the inner cavity 11. The material enters the inner cavity 11 through the input port and flows in the inner cavity 11 towards the output port. The flow direction of the material is from the input port to the output port of the housing 10. The first wall 12 and the second wall 13 are two side walls of the housing 10. The first wall 12 is used to connect with the suction accessory 200. The first wall 12 and the second wall 13 form the inner cavity 11 for conveying the material, so that the material can flow along a preset track.

[0094] The suction accessory 200 is used to adsorb the ferromagnetic impurities in the material, so as to reduce the content of the ferromagnetic impurities in the material output by the impurity removal device. The suction accessory 200 has a part for adsorbing the ferromagnetic impurities. The part for adsorbing the ferromagnetic impurities on the suction accessory 200 is at least partially located in the inner cavity 11. The part for adsorbing the ferromagnetic impurities on the suction accessory 200 has magnetism, such as a magnetic needle 20 or a magnetic bar, or can present a state with magnetism, such as an electrified state, when the impurity removal device is running.

[0095] When the material flows along the path in the inner cavity 11 formed by the housing 10, the ferromagnetic impurities in the material flow through the suction accessory 200. The ferromagnetic impurities are adsorbed onto the suction accessory 200 under the action of the suction accessory 200, thereby reducing the content of the ferromagnetic impurities in the material output from the housing 10, and achieving the effect of removing impurities.

[0096] The extension direction of the suction accessory 200 intersects with the flow direction of the material, that is, the extension direction of the suction accessory 200 is arranged at an angle with the flow direction of the material, and the extension direction of the suction accessory 200 is not parallel to the flow direction of the material. When the material flows relatively in the inner cavity 1111, the material does not flow along the extension direction of the suction accessory 200.

[0097] When the slurry enters the shell 10, the position close to the input port is the upstream position of the inner cavity 11, and the position close to the output port is the downstream position of the inner cavity 11. Due to the fact that the material can flow in the inner cavity 11 in a concentrated manner, the material can flow along the preset flow direction. Under the magnetic attraction of the suction accessory 200, the ferromagnetic impurities in the slurry are adsorbed onto the suction accessory 200. The suction accessory 200 in the example can block the flow direction of the slurry, so that the slurry is hindered by the suction accessory 200 during the flow process, so that at least part of the slurry is disturbed or diverted under the blockage of the suction accessory 200, thereby enabling the ferromagnetic impurities in the slurry to be adsorbed onto the suction accessory 200, so that the content of ferromagnetic impurities in the slurry output by the shell 10 is reduced. Due to the fact that the extension direction of the suction accessory 200 intersects the conveying direction of the material, the adsorption efficiency of the slurry at different positions of the suction accessory 200 is close during the flow of the slurry along the preset direction. Due to the fact that the decontamination device is continuously used during use, if the flow direction of the slurry is consistent with the extension direction of the suction accessory 200, the suction accessory 200 will first contact the ferromagnetic impurities in the slurry at the position close to the upstream of the inner cavity 11, and the amount of ferromagnetic impurities adsorbed at the position close to the downstream of the inner cavity 11 is relatively small. Correspondingly, the amount of ferromagnetic impurities adsorbed in the extension direction of the suction accessory 200 is not equal, which is easy to cause the suction accessory 200 to be unstable in gravity center, thereby causing the suction accessory 200 to be easy to incline, deviate or deform, and even possibly causing the suction accessory 200 to fall off, affecting the stability of the suction accessory 200 and the adsorption efficiency of the suction accessory 200.

[0098] Please refer to Figure 4 In some examples, the first wall 12 of the shell 10 is located at the upper end of the shell 10, and the second wall 13 is located at the lower end of the shell 10. The first wall 12 is oppositely arranged with the second wall 13, and the material moves between the first wall 12 and the second wall 13. The suction accessory 200 is connected with the first wall 12 and extends towards the second wall 13, so that the suction accessory 200 is in a generally upward-downward extending state. Due to the fact that the suction accessory 200 is in a generally upward-downward extending state, the suction accessory 200 itself is subjected to the action of gravity, and during the flow of the slurry, the suction accessory 200 has a certain stability to prevent the suction accessory 200 from shaking under the action of the slurry.

[0099] In some examples, the first wall 12 and the second wall 13 of the shell 10 are walls arranged at an angle with the horizontal plane, and the first wall 12 is oppositely arranged with the second wall 13 to facilitate positioning of the suction accessory 200.

[0100] In some examples, one end of the suction accessory 200 is connected with the first wall 12, and the other end of the suction accessory 200 is connected with the second wall 13, so that both ends of the suction accessory 200 in the extension direction are fixed to prevent the suction accessory 200 from shaking or falling off under the action of the material, thereby ensuring that the suction accessory 200 remains in an effective adsorption state.

[0101] In some examples, the suction accessories 200 are in a strip shape, a sheet shape or other shapes that can extend along a preset direction. Taking the sheet shape as an example, in some examples, gaps are formed on the suction accessories 200 for the slurry to flow through the suction accessories 200 in a downstream direction, so that the ferromagnetic impurities in the slurry can be adsorbed by the magnetic force of the suction accessories 200 when the slurry flows through the suction accessories 200. In some examples, the suction accessories 200 and the inner wall surface of the inner cavity 11 have gaps for the slurry to flow in the downstream direction, so that the suction accessories 200 can block the slurry while the slurry can be smoothly output in the downstream direction. In some examples, gaps are formed on the suction accessories 200 for the slurry to flow through the suction accessories 200 in the downstream direction, and the suction accessories 200 and the inner wall surface of the inner cavity 11 have gaps, so as to improve the conveying efficiency of the slurry.

[0102] In some examples, the number of the suction accessories 200 is multiple groups, and at least two groups of the suction accessories 200 are arranged at intervals along the flow direction of the material. By arranging multiple groups of the suction accessories 200, the slurry can flow through the multiple groups of the suction accessories 200 during the flow of the slurry, so that the multiple groups of the suction accessories 200 can act on the ferromagnetic impurities in the slurry in turn, thereby improving the adsorption efficiency.

[0103] Please refer to Figure 3 and Figure 4 In some examples, the number of the suction accessories 200 is multiple groups. Each group of the suction accessories 200 can form an adsorption barrier for adsorbing and removing the ferromagnetic impurities in the material. The multiple groups of the suction accessories 200 are arranged at intervals along the flow direction of the material, so that the multiple groups of the suction accessories 200 form multiple adsorption barriers in the flow direction of the material, thereby achieving multi-stage adsorption and removal of the material. When the material flows, the ferromagnetic impurities in the material can be at least partially adsorbed by the corresponding group of the suction accessories 200 when the material flows through each group of the suction accessories 200, so that the ferromagnetic impurities in the material are adsorbed by the multiple groups of the suction accessories 200 when the material flows through the multiple groups of the suction accessories 200.

[0104] At least two groups of suction accessories 200 in the example are arranged in a staggered manner in the flow direction of the material, that is, the projections of at least two groups of suction accessories 200 are arranged in a staggered manner along the flow direction of the material.

[0105] Please refer to Figure 5 In some examples, at least two groups of suction accessories 200 are arranged in a staggered manner in the flow direction of the material.

[0106] At least two groups of suction accessories 200 in the example are arranged in a staggered manner in the flow direction of the material, that is, the projections of at least two groups of suction accessories 200 are arranged in a staggered manner along the flow direction of the material.

[0107] When the material flows along the preset flow direction, when the suction accessories 200 are arranged in a staggered manner along the flow direction of the material, the material is blocked at the position of the corresponding suction accessories 200, thereby forcing the material to change direction. With the change of the flow direction of the material, the position of the ferromagnetic impurities in the material also changes, thereby increasing the probability of the ferromagnetic impurities in the material being close to the magnetic assembly and improving the adsorption efficiency of the suction accessories 200 on the ferromagnetic impurities in the material. When the adjacent suction accessories 200 are arranged in a staggered manner along the flow direction of the material, the material can flow along the gap between the adjacent suction accessories 200 under the action of the suction accessories 200, so that the material is more likely to be disturbed. The suction accessories 200 downstream and the suction accessories 200 upstream are arranged in a staggered manner in the flow direction of the material, so that the material is more likely to flow directly to the suction accessories 200 downstream after changing the flow direction, thereby greatly increasing the contact probability of the ferromagnetic impurities in the material with the suction accessories 200 downstream.

[0108] In some examples, any two adjacent groups of the suction members 200 are arranged staggered in the flow direction of the material, so that the material can be continuously diverted and disturbed under the action of any two adjacent groups of the suction members 200 during the flow process, and most of the ferromagnetic impurities in the material can be adsorbed onto the suction members 200 after the material flows through the multiple groups of the suction members 200, thereby effectively improving the adsorption efficiency of the suction members 200.

[0109] In some examples, the extension direction of the suction member 200 is arranged perpendicular to the plane where the second wall 13 is located. By arranging the suction member 200 perpendicular to the second wall 13, the installation of the suction member 200 is facilitated, and the alignment and fixation of the suction member 200 are facilitated. Further, in some examples, the end of the suction member 200 away from the first wall 12 is connected with the second wall 13, so that the second wall 13 can support the suction member 200 to prevent the deformation of the suction member 200.

[0110] In some examples, the suction member 200 is detachably connected with the first wall 12, so that the replacement and maintenance of the suction member 200 are facilitated.

[0111] Please refer to Figure 6 and Figure 7 In some examples, on the basis of any of the above examples, the suction member 200 comprises multiple magnetic needles 20 arranged spaced apart in a first direction; the magnetic needles 20 are connected with the first wall 12 and extend towards the second wall 13, and the flow direction of the material intersects the first direction.

[0112] The magnetic needle 20 in the present example has magnetism, or the magnetic needle 20 can have magnetism under the condition of being energized, etc. By arranging each suction member 200 with multiple magnetic needles 20, multiple magnetic needles 20 can be installed in a limited space, and gaps for the flow of the slurry can be formed between adjacent magnetic needles 20, thereby increasing the total adsorption area of the suction member 200 and the slurry.

[0113] Please refer to Figure 5 , Figure 6 and Figure 7 The magnetic needles 20 of at least two groups of the suction members 200 are arranged staggered in the flow direction of the material. As shown in FIG. 6, Figure 7The direction of the arrow indicates the flow direction of the material. The magnetic needles 20 of the at least two groups of suction accessories 200 are arranged in staggered positions in the flow direction of the material. That is, in a cross section perpendicular to the flow direction of the material, the projection parts of the magnetic needles 20 of the at least two groups of suction accessories 200 are staggered, or the projection parts of the magnetic needles 20 of the at least two groups of suction accessories 200 are completely staggered. In the flow direction of the material, the end close to the input port of the shell 10 is the upstream of the flow direction of the material, and the end close to the output port of the shell 10 is the downstream of the flow direction of the material. The magnetic needles 20 of the at least two groups of suction accessories 200 are arranged in staggered positions in the flow direction of the material. In the flow direction of the material, after the material passes through the gap between the magnetic needles 20 of the upstream group of suction accessories 200, the gap between the magnetic needles 20 of the downstream group of suction accessories 200 is staggered with the gap between the magnetic needles 20 of the upstream group of suction accessories 200. Therefore, when the material flows into the gap between the magnetic needles 20 of the downstream group of suction accessories 200, the material needs to be diverted, that is, the magnetic needles 20 of the downstream group of suction accessories 200 block the material to make the material divert when the material flows through the gap between the magnetic needles 20 of the downstream group of suction accessories 200.

[0114] When the material flows through the gap between the magnetic needles 20 of the upstream group of suction accessories 200, part of the ferromagnetic impurities in the material are adsorbed by the magnetic needles 20, and the ferromagnetic impurities in the material are reduced to a certain extent. When the material continues to flow downstream, the flow trajectory of the particles in the material is disturbed because the material is diverted when it flows into the gap between the magnetic needles 20 of the downstream group of suction accessories 200. Therefore, the ferromagnetic impurities in the material can have more opportunities to contact the magnetic needles 20, and the adsorption efficiency of the magnetic needles 20 can be improved. Thus, the adsorption amount of the magnetic needles 20 to the ferromagnetic impurities in the material can be effectively increased, and the removal rate of the ferromagnetic impurities in the material can be higher.

[0115] When the material flows in the inner cavity 11, the magnetic needle 20 of the suction accessory 200 is more likely to contact the material on the side end face facing the upstream, while the contact between the magnetic needle 20 and the material on the side end face facing the downstream is relatively less. Taking the magnetic needle 20 of the first group of suction accessories 200 and the second group of suction accessories 200 as an example, since the first group of suction accessories 200 and the second group of suction accessories 200 are arranged at intervals along the flow direction of the material, after the material flows through the first group of suction accessories 200, part of the ferromagnetic impurities in the material are adsorbed on the magnetic needle 20 of the first group of suction accessories 200. When the material flows to the second group of suction accessories 200, since the magnetic needle 20 of the second group of suction accessories 200 is staggered with the magnetic needle 20 of the first group of suction accessories 200, when the material flows between the magnetic needle 20 of the second group of suction accessories 200, the flow direction of the material changes, so that the material in the area between the first group of suction accessories 200 and the second group of suction accessories 200 is blocked, and the material flows between the first group of suction accessories 200 and the second group of suction accessories 200. The material generates vortex flow on the side of the magnetic needle 20 of the first group of suction accessories 200 facing the downstream direction, which increases the contact opportunity between the material and the side end face of the magnetic needle 20 of the suction accessory 200 facing the downstream direction, thereby increasing the ferromagnetic impurities adsorbed by the side end face of the magnetic needle 20 facing the downstream direction, and thereby improving the adsorption efficiency of the ferromagnetic impurities, and at the same time, improving the utilization rate of the magnetic needle 20.

[0116] Compared with the distance from the input port to the output port of the shell 10, since the material is diverted during the flow process, the moving path of the material is lengthened, and correspondingly, the total time length of the material staying in the inner cavity 11 is lengthened, thereby prolonging the contact time between the material and the magnetic needle 20, and effectively improving the adsorption efficiency of the magnetic needle 20.

[0117] In some examples, the magnetic needle 20 is a rod-shaped structure formed by a structure such as a magnet having magnetism, and the magnetic needle 20 itself has magnetism. In some examples, the magnetic needle 20 is a structure capable of generating magnetism under certain conditions (such as a conductive state).

[0118] In some examples, the shape of the shell 10 can be a cuboid structure, or a cylinder or other shape. In the cross section perpendicular to the flow direction of the material, the cross-sectional shape of the inner cavity 11 can be a rectangle, or other shapes. Further, in some examples, in the cross section perpendicular to the flow direction of the material, the cross-sectional shape of the inner cavity 11 can be a rectangle, thereby the magnetic needles 20 of the multiple groups of suction accessories 200 can be arranged with equal length, or the magnetic needles 20 of the multiple groups of suction accessories 200 can be arranged with length close to each other, thereby facilitating the molding and processing of the magnetic needle 20.

[0119] In some examples, each set of adsorption elements 200 is fixedly connected to the first wall 12 as a whole to improve the stability of the adsorption elements 200. In some examples, the adsorption elements 200 are detachably connected to the first wall 12 to facilitate cleaning or replacement of the adsorption elements 200 when needed. In some examples, the lower end of the magnetic needle 20 is fixedly connected to the second wall 13 to keep the lower end of the magnetic needle 20 in a preset fixed position and prevent the magnetic needle 20 from tilting or shifting. In some examples, the lower end of the magnetic needle 20 is detachably connected to the second wall 13 to facilitate disassembly or replacement of the magnetic needle 20.

[0120] In some examples, the maximum outer circumferential diameter of the magnetic needles 20 in adjacent groups of adsorption elements 200 is equal to facilitate the forming of the magnetic needles 20. In some examples, the maximum outer circumferential diameter of the magnetic needles 20 in adjacent groups of adsorption elements 200 is not equal to determine the maximum outer circumferential diameter of the magnetic needle 20 at the corresponding position based on the location of the magnetic needle 20.

[0121] Please see Figure 2 and Figure 3 In some examples, the spacing between adjacent groups of adsorption elements 200 is equal to facilitate quick installation. In other examples, the spacing between adjacent groups of adsorption elements 200 is unequal to adjust the density of the magnetic needles 20 as needed.

[0122] In some examples, the spacing between the magnetic needles 20 of each group of adsorption elements 200 is equal, so that the adsorption elements 200 form standard parts, which facilitates processing and molding. In some examples, the spacing between the magnetic needles 20 of each group of adsorption elements 200 is not equal, so as to adjust the adsorption efficiency of ferromagnetic impurities at different positions as needed, and also to facilitate the control of material flow rate. In some examples, the magnetic needles 20 are generally cylindrical, or the magnetic needles 20 have a polygonal prism structure.

[0123] In some examples, the impurity removal device is used to remove ferromagnetic impurities from the slurry. In some examples, the impurity removal device can be used to remove ferromagnetic impurities from the powder. When used to remove ferromagnetic impurities from the powder, the powder can be made to flow from the input end to the output end of the inner cavity 11 by means of a high-speed airflow.

[0124] Please see Figure 7In some examples, any two adjacent groups of the magnetic needles 20 are arranged to be at least partially staggered in the flow direction of the material. When the material flows through the groups of the magnetic needles 20, after the material flows through the magnetic needles 20 of the first group of the magnetic needles 20, the material is blocked by the magnetic needles 20 of the corresponding group of the magnetic needles 20 when flowing to the magnetic needles 20 of any downstream group of the magnetic needles 20. Therefore, the material can be turned when flowing through the magnetic needles 20 of each group of the magnetic needles 20, so that the adsorption efficiency of the material at the position of each group of the magnetic needles 20 can be improved, and the adsorption efficiency of the ferromagnetic impurities in the material can be effectively improved.

[0125] In some examples, the material impurity removal device further comprises a detection mechanism 30 arranged in the housing 10, for detecting the adsorption amount of the ferromagnetic impurities on the magnetic needles 20.

[0126] When the magnetic needles 20 are used for a period of time, a certain amount of ferromagnetic impurities is attached to the magnetic needles 20. As the amount of ferromagnetic impurities increases, the adsorption capacity of the magnetic needles 20 gradually decreases. By detecting the adsorption amount of the ferromagnetic impurities on the magnetic needles 20 through the detection mechanism 30, it can be determined whether the current adsorption capacity of the magnetic needles 20 reaches the adsorption limit, and then it can be determined whether the magnetic needles 20 need to be cleaned or replaced according to the need. Because the overall weight of the magnetic needles 20 and the adsorption capacity of the magnetic needles 20 will change after a large amount of ferromagnetic impurities is attached to the magnetic needles 20, the current adsorption amount of the ferromagnetic impurities on the magnetic needles 20 can be determined by detecting the change of the current weight of the magnetic needles 20 or the adsorption capacity of the magnetic needles 20.

[0127] In some examples, the magnetic needles 20 are arranged to extend in the vertical direction, the adsorption amount of the ferromagnetic impurities on the magnetic needles 20 is the weight of the ferromagnetic impurities, and the detection mechanism 30 is a weight detection assembly for detecting the weight of the ferromagnetic impurities on the magnetic needles 20.

[0128] The weight detection assembly can be a weight sensor assembly. The weight sensor assembly detects the real-time weight of the magnetic needles 20. By comparing the real-time weight of the magnetic needles 20 with the weight of the clean magnetic needles 20, the weight of the ferromagnetic impurities currently attached to the magnetic needles 20 can be determined according to the difference between the two, and then it can be determined whether the magnetic needles 20 need to be cleaned or replaced. In some examples, the weight sensor assembly can be a combination of an existing weight sensor and a controller. The controller can obtain the current attachment amount of the ferromagnetic impurities of the magnetic needles 20 through an existing program.

[0129] Please refer to Figure 3In some examples, the weight detection assembly is arranged at the lower end of the magnetic needle 20, and the weight detection assembly bears the weight of the magnetic needle 20 so that the weight detection assembly obtains the real-time weight of the magnetic needle 20. The lower end of the magnetic needle 20 can be directly attached to the weight detection assembly, and the weight detection assembly can obtain real-time data when the weight of the magnetic needle 20 changes.

[0130] In some examples, the weight detection assembly is in the form of a ring body and is sleeved on the magnetic needle 20. The weight of the magnetic needle 20 acts on the weight detection assembly, so that the weight detection assembly can obtain the current weight information of the magnetic needle 20. By using the ring-shaped weight detection assembly, the real-time weight of the magnetic needle 20 can be obtained while the magnetic needle 20 is limited inside the weight detection assembly, thereby preventing the magnetic needle 20 from deviating. Since the upper end of the magnetic needle 20 is connected to the first wall 12 and the lower end of the magnetic needle 20 is limited in the weight detection assembly, both the upper and lower ends of the magnetic needle 20 are limited, thereby achieving the limiting and fixing of the magnetic needle 20.

[0131] In some examples, the adsorption amount of the ferromagnetic impurities on the magnetic needle 20 is the enrichment degree of the ferromagnetic impurities; the detection mechanism 30 is a magnetic field detection assembly, and the magnetic field detection assembly is used to detect the enrichment degree of the ferromagnetic impurities on the magnetic needle 20 under the corresponding magnetic field strength.

[0132] As the enrichment degree of the ferromagnetic impurities on the magnetic needle 20 increases, the magnetic attraction ability of the magnetic needle 20 gradually decreases. In this example, the magnetic field strength of the magnetic needle 20 is detected by the magnetic field detection assembly, and the amount of ferromagnetic impurities currently attached to the magnetic needle 20 is indirectly calculated according to the magnetic field strength. In some examples, the magnetic field detection assembly includes a magnetic field strength sensor and a controller. The magnetic field strength sensor is used to detect the current magnetic field strength of the magnetic needle 20, and the controller determines the enrichment degree of the ferromagnetic impurities on the magnetic needle 20 according to the magnetic field strength through existing programs.

[0133] Please refer to Figure 3 In some examples, the lower end of the magnetic needle 20 is connected and fixed to the second wall 13. By connecting and fixing the lower end of the magnetic needle 20 to the second wall 13, the lower end of the magnetic needle 20 is kept in a predetermined position, thereby reducing the possibility of the lower end of the magnetic needle 20 being deviated by the flow of materials. In this example, the lower end of the magnetic needle 20 can be fixedly connected to the second wall 13 or detachably connected to the second wall 13.

[0134] Further, in some examples, the second wall 13 is provided with a fixing member 40, the fixing member 40 is provided with a positioning slot 41, and the magnetic needle 20 is inserted into the positioning slot 41. The fixing member 40 is an intermediate connecting member arranged on the second wall 13 to connect the second wall 13 and the magnetic needle 20. In some examples, the fixing member 40 is a boss protruding from the second wall 13, and one end of the fixing member 40 towards the first wall 12 is connected to and fixed with the lower end of the magnetic needle 20. In some examples, the fixing member 40 is detachably connected to the second wall 13.

[0135] The positioning slot 41 on the fixing member 40 has a slot opening, and the lower end of the magnetic needle 20 is inserted into the positioning slot 41 through the slot opening, so that the lower end of the magnetic needle 20 is limited in the positioning slot 41. In the present example, the slot opening of the positioning slot 41 can be arranged on the side end face of the fixing member 40 towards the first wall 12; the slot opening of the positioning slot 41 can also be arranged on the side of the fixing member 40 towards the input port of the shell 10, as long as the lower end of the magnetic needle 20 can be limited.

[0136] By limiting the lower end of the magnetic needle 20 with the positioning slot 41, the magnetic needle 20 can be quickly inserted into the fixing member 40, thereby realizing the quick disassembly of the magnetic needle 20, preventing the magnetic needle 20 from being displaced by the material, and making the magnetic needle 20 more convenient to disassemble.

[0137] In some examples, the length direction of the magnetic needle 20 is arranged perpendicular to the plane where the second wall 13 is located. By arranging the length direction of the magnetic needle 20 perpendicular to the plane where the second wall 13 is located, the alignment and installation of the magnetic needle 20 can be facilitated. When the impurity removal device is provided with the detection mechanism 30 of any one of the above examples, the magnetic needle 20 can be conveniently detected to improve the detection accuracy.

[0138] Please refer to Figure 2 , Figure 3 and Figure 4 In some examples, the suction accessory 200 is detachably connected to the first wall 12.

[0139] In the present example, each group of suction accessories 200 can be regarded as a whole, and when the magnetic needle 20 needs to be cleaned or replaced, the suction accessories 200 corresponding to the group of the magnetic needle 20 are disassembled as a whole, thereby facilitating the overall cleaning or replacement of the magnetic needle 20.

[0140] Since the multiple groups of suction accessories 200 are arranged in intervals along the flow direction of the material, the amount of ferromagnetic impurities attached to the magnetic needle 20 in each group of suction accessories 200 is relatively constant, and therefore, the magnetic needle 20 in each group of suction accessories 200 can be regarded as a whole for overall cleaning or replacement.

[0141] In some examples, each magnetic needle 20 of the suction accessory 200 is detachably connected with the first wall 12. Since the quality of the magnetic needle 20 and the specific position of the magnetic needle 20 can have certain differences, the use of the magnetic needle 20 can also have differences. Therefore, by detachably connecting each magnetic needle 20 with the first wall 12, the replacement or cleaning of each magnetic needle 20 can be facilitated. Further, when the impurity removal device is provided with the detection mechanism 30 described in any of the above examples, by detecting the amount of ferromagnetic impurities attached to each magnetic needle 20 through the detection mechanism 30, it can be determined according to the detection result which magnetic needles 20 need to be replaced, or which magnetic needles 20 need to be cleaned, thereby facilitating real-time detection and maintenance of the magnetic needles 20.

[0142] In some examples, the first wall 12 is provided with a mounting hole 14, and the magnetic needle 20 is inserted into the mounting hole 14. The inner diameter of the mounting hole 14 is not less than the maximum outer peripheral diameter of the magnetic needle 20, so that the magnetic needle 20 can be inserted into the inner cavity 11 through the mounting hole 14. By using the mounting hole 14 for insertion, the disassembly and assembly of the magnetic needle 20 can be facilitated. The upper end of the magnetic needle 20 is limited by the mounting hole 14 to prevent the upper end of the magnetic needle 20 from shifting.

[0143] In some examples, the material impurity removal device further comprises a sealing member 50 provided on the first wall 12 for sealing the mounting hole 14. By providing the sealing member 50, after the magnetic needle 20 is installed, the mounting hole 14 can be sealed to prevent external impurities from entering the inner cavity 11 and contaminating the material. In some examples, the sealing member 50 can be annular as a whole, and the magnetic needle 20 is inserted into the sealing member 50, so that the sealing member 50 can seal the gap between the outer peripheral wall of the magnetic needle 20 and the inner wall of the mounting hole 14. In some examples, the magnetic needle 20 abuts against the inner wall of the mounting hole 14, and the sealing member 50 seals the gap between the outer wall of the magnetic needle 20 and the inner wall of the mounting hole 14. The sealing member 50 can be made of a non-metallic material resistant to corrosion. In some examples, the sealing member 50 is provided on the side of the first wall 12 away from the second wall 13 to seal one end of the mounting hole 14.

[0144] In some examples, the magnetic needle 20 is connected with the sealing member 50, and the sealing member 50 is inserted into the mounting hole 14. The sealing member 50 serves as an intermediate connecting member between the magnetic needle 20 and the first wall 12, so that the magnetic needle 20 is fixed on the first wall 12. By inserting the sealing member 50 into the mounting hole 14, the sealing member 50 can be easily positioned, and the sealing of the mounting hole 14 and the positioning of the magnetic needle 20 can be achieved at the same time. By using the sealing member 50 as an intermediate buffer member, the mutual friction and damage between the magnetic needle 20 and the first wall 12 can be prevented.

[0145] In some examples, the maximum outer peripheral diameter of the magnetic needle 20 is not less than 1 mm and not more than 100 mm.

[0146] The maximum outer diameter of the magnetic needle 20 is not less than 1 mm to ensure the structural strength of the magnetic needle 20. The maximum outer diameter of the magnetic needle 20 is not more than 100 mm to prevent the volume of the magnetic needle 20 from being too large. The larger the maximum outer diameter of the magnetic needle 20 is, the fewer the number of magnetic needles 20 that can be installed in the inner cavity 11, under the premise that the volume of the inner cavity 11 is constant. In the present example, the maximum outer diameter of the magnetic needle 20 can be 1 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, or 100 mm. The maximum outer diameter of the magnetic needle 20 can also be any other value within the above range. By limiting the maximum outer diameter of the magnetic needle 20, the number of magnetic needles 20 that can be installed can be determined according to the volume of the inner cavity 11 and the type of material. In the case of a cylindrical structure of the magnetic needle 20, the larger the outer diameter of the magnetic needle 20 is, the fewer the number of magnetic needles 20 that can be installed in the inner cavity 11. In the present example, the magnetic needle 20 is provided in the form of a needle structure with a small outer diameter, which can help to increase the density of the magnetic needle 20, thereby improving the adsorption efficiency of the material. In some examples, the maximum outer diameter of the magnetic needle 20 is proportional to the volume of the inner cavity 11, so as to install a sufficient number of magnetic needles 20 as required. In some examples, the selection of the maximum outer diameter of the magnetic needle 20 is related to factors such as the type of corresponding material and the density of the material. For example, when the density of the material is large, the maximum outer diameter of the magnetic needle 20 is also relatively large to improve the strength of the magnetic needle 20.

[0147] In some examples, the distance between adjacent magnetic needles 20 is not less than 1 mm and not more than 100 mm.

[0148] The distance between adjacent magnetic needles 20 is not less than 1 mm to ensure the density of the magnetic needles 20 while ensuring the flow speed of the material. The distance between adjacent magnetic needles 20 is not more than 100 mm to prevent the distance between adjacent magnetic needles 20 from being too large, which causes the material to not be in sufficient contact with the magnetic needles 20. In the case that the volume of the inner cavity 11 is constant, the greater the distance between adjacent magnetic needles 20, the fewer the number of magnetic needles 20 that can be installed. In the example, the distance between adjacent magnetic needles 20 can be 1 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, or 100 mm. The distance between adjacent magnetic needles 20 can also be any other value within the above range. By limiting the distance between adjacent magnetic needles 20, the flow and flow rate of the material can be conveniently controlled to enable the material to be transported at a preset speed while ensuring sufficient contact time between the material and the magnetic needles 20. In some examples, the distance between adjacent magnetic needles 20 is proportional to the volume of the inner cavity 11 to install a sufficient number of magnetic needles 20 as needed. In some examples, the distance between adjacent magnetic needles 20 is selected in relation to factors such as the type of corresponding material and the density of the material. For example, when the density of the material is large, the distance between adjacent magnetic needles 20 is relatively large to enable the material to flow at a preset flow rate and achieve normal transportation of the material.

[0149] In some examples, the shell 10 further includes a third wall 15 and a fourth wall 16 arranged opposite to each other; the first wall 12, the third wall 15, the second wall 13, and the fourth wall 16 are sequentially connected and enclosed to form the inner cavity 11 in the shape of a cuboid. The first wall 12 is arranged opposite to the second wall 13, and the third wall 15 is arranged opposite to the fourth wall 16 to enclose the first wall 12, the second wall 13, the third wall 15, and the fourth wall 16 to form the inner cavity 11. In some examples, the inner cavity 11 has a cuboid structure, and the magnetic needles 20 can be arranged in a matrix when installed due to the overall cuboid structure of the inner cavity 11. When selecting the magnetic needles 20, magnetic needles 20 with equal lengths or lengths close to each other can be selected to facilitate the design of the magnetic needles 20 as standard parts for batch molding.

[0150] In some examples, the third wall 15 and / or the fourth wall 16 are detachably connected to the first wall 12. The first wall 12 is arranged opposite to the second wall 13, and the third wall 15 is arranged opposite to the fourth wall 16 to enclose the first wall 12, the second wall 13, the third wall 15, and the fourth wall 16 to form the inner cavity 11, and the shape of the inner cavity 11 can be determined as needed. In the example, one of the third wall 15 and the fourth wall 16 can be detachably connected to the first wall 12, or both the third wall 15 and the fourth wall 16 can be detachably connected to the first wall 12. Since the first wall 12 is a detachable structure, the second wall 13 and the suction member 200 on the first wall 12 can be integrally detached when needed to facilitate replacement or cleaning of the magnetic needles 20.

[0151] In some examples, the housing 10 has an upper end and a lower end, the first wall 12 is arranged close to the upper end of the housing 10, and the second wall 13 is arranged close to the lower end of the housing 10. One end of the suction accessory 200 is connected to the first wall 12, and the other end is connected to the second wall 13, so that the suction accessory 200 is arranged vertically as a whole. The suction accessory 200 extends vertically under the action of gravity, thereby preventing the suction accessory 200 from shaking along the flow direction of the material.

[0152] Please refer to Figure 5 In some examples, the material impurity removal device further comprises a feeding pipe 60 connected to the housing 10, the feeding pipe 60 forms a feeding passage 61 communicating with the inner cavity 11; in a planar projection of the feeding pipe 60 and the housing 10 in a direction perpendicular to the flow direction of the material, a projection of the feeding passage 61 falls within a projection of the inner wall surface of the inner cavity 11.

[0153] The projection of the feeding passage 61 falling within the projection of the inner wall surface of the inner cavity 11 means that the general outline of the inner wall surface of the feeding passage 61 is within the projection of the inner wall surface of the inner cavity 11, and the effective cross-sectional area of the feeding passage 61 formed in the feeding pipe 60 is smaller than the effective cross-sectional area of the inner cavity 11. Because the effective cross-sectional area in the feeding pipe 60 is relatively small, the space available for the flow of the material increases when the material enters the inner cavity 11 from the feeding passage 61, so that the material can gradually flow in a dispersed state towards the output port of the inner cavity 11. By enabling the material to be transported in a dispersed state, the contact time of the material with the magnetic needle 20 is prolonged, and the adsorption effect of the magnetic needle 20 on the ferromagnetic impurities in the material can also be relatively improved.

[0154] Because the effective cross-sectional area of the feeding passage 61 is relatively small, the input amount of the material can be conveniently controlled when the material is input, so that the input amount of the material is adapted to the magnetic needle 20 in the inner cavity 11, thereby the adsorption efficiency of the magnetic needle 20 can be controlled.

[0155] In some examples, the housing has an upper end and a lower end, the first wall is arranged close to the upper end of the housing, and the second wall is arranged close to the lower end of the housing; the feeding pipe 60 has a first outer surface 62, the first outer surface 62 is located on the same side of the housing as the first wall 12, and the outer surface of the first wall 12 is arranged protruding relative to the first outer surface 62. The upper end surface of the feeding pipe 60 is the first outer surface 62, the distance between the first outer surface 62 of the feeding pipe 60 and the horizontal plane is a first distance, the distance between the outer surface of the first wall 12 and the horizontal plane is a second distance, and the first distance is smaller than the second distance. In the present example, the outer surface of the first wall 12 is arranged protruding outward, which can conveniently position the installation position of the suction accessory 200 when the suction accessory is installed, thereby facilitating the disassembly and assembly of the suction accessory 200.

[0156] In some examples, the first wall 12 and the second wall 13 are oppositely arranged along a vertical direction, the first wall 12 is arranged close to an upper end of the housing, the second wall 13 is arranged close to a lower end of the housing, the feeding pipe 60 has a first inner surface 63, the first inner surface 63 is located on the same side of the housing as the first wall 12, along the vertical direction, the distance between the inner surface of the first wall 12 and the second wall 13 is greater than the distance between the first inner surface 63 and the second wall 13. In the vertical direction, the first outer surface 62 of the feeding pipe 60 is arranged lower than the outer surface of the first wall 12, so that when the material is input into the inner cavity 11, the input amount of the material is controlled through the feeding channel 61. When the material in the feeding channel 61 enters the inner cavity 11, the space of the inner cavity 11 increases, so that the material can have a larger movement space. When the flow of the material in the feeding channel 61 is constant, the material enters the inner cavity 11 with a larger space, and a space is formed above the material close to the first wall 12, so that there is a gap between the liquid surface of the material and the first wall 12, thereby preventing the material from leaking from the mounting hole 14 on the first wall 12.

[0157] In some examples, the feeding pipe 60 has a second outer surface 64, the second outer surface 64 is located on the same side of the housing as the second wall 13, and the outer surface of the second wall 13 is arranged flush with the second outer surface 64. The lower end surface of the feeding pipe 60 is the second outer surface 64, and the second outer surface 64 of the feeding pipe 60 is on the same plane as the outer surface of the second wall 13. When installing the material impurity removal device, the second outer surface 64 of the feeding pipe 60 and the outer surface of the second wall 13 can be installed on the same platform, thereby facilitating the installation of the feeding pipe 60 and the second wall on the same plane, thereby facilitating the installation. By supporting the lower end surface of the feeding pipe 60 and the second wall 13 on the same platform, the material in the feeding channel 61 and the inner cavity 11 can be supported, preventing deformation of the feeding pipe 60 or the inner cavity 11.

[0158] In some examples, the material impurity removal device further comprises a first transition pipe 70, a first transition channel 71 is formed in the first transition pipe 70, and the feeding channel 61 is connected with the inner cavity 11 through the first transition channel 71; along the flow direction of the material, the inner diameter of the first transition channel 71 gradually increases. One end of the first transition pipe 70 is connected with the feeding pipe 60, and the other end of the first transition pipe 70 is connected with the housing 10, so that the feeding channel 61, the first transition channel 71 and the inner cavity 11 are sequentially connected.

[0159] The first transition channel 71 is gradually enlarged along the flow direction of the material, that is, the cross-sectional area of the first transition channel 71 gradually increases along the flow direction of the material, so that the space for the movement of the material gradually increases during the flow process. By gradually increasing the material flow space, the material can be more dispersedly input into the inner cavity 11, thereby improving the contact efficiency of the material and the magnetic needle 20, and helping to improve the adsorption efficiency of the ferromagnetic impurities in the material. By using the first transition channel 71 with a gradually enlarged inner diameter, the material entering the inner cavity 11 will not have a sudden change in direction, thereby reducing the possibility of vortex flow of the material at the connection between the feed pipe 60 and the shell 10 when entering the inner cavity 11, and helping to ensure the input efficiency of the material.

[0160] In some examples, the ratio of the area of the inner cavity 11 to the area of the feed channel 61 in a planar projection of the shell 10 and the feed pipe 60 in a direction perpendicular to the flow direction of the material is not greater than 2 and not less than 1.5; the shell 10 and the feed pipe 60 form a projection of the cross section for the flow of the material in a planar projection in a direction perpendicular to the flow direction of the material. By making the ratio of the cross-sectional area of the inner cavity 11 to the cross-sectional area of the feed channel 61 not greater than 2, the inner cavity 11 internal space can be fully utilized to prevent the inner cavity 11 from being too large and the feed channel 61 being too small, which reduces the input speed of the material and causes the utilization rate of the magnetic needle 20 in the inner cavity 11 to be not high. By making the ratio of the cross-sectional area of the inner cavity 11 to the cross-sectional area of the feed channel 61 not less than 1.5, the magnetic needle 20 can be easily placed in the inner cavity 11 through the space formed by the feed channel 61, thereby facilitating the installation of the magnetic needle 20. The ratio of the cross-sectional area of the inner cavity 11 to the cross-sectional area of the feed channel 61 can be 2, 1.9, 1.8, 1.7, 1.6 or 1.5, or any value within the above range.

[0161] In some examples, the material impurity removal device further comprises a discharge pipe 80 connected to the shell 10, the discharge pipe 80 forming a discharge channel 81 communicating with the inner cavity 11; the discharge pipe 80 and the shell 10 form a planar projection in a direction perpendicular to the flow direction of the material, and the projection of the discharge channel 81 falls within the projection of the inner wall surface of the inner cavity 11.

[0162] The projection of the discharge channel 81 falls within the projection of the inner wall surface of the inner cavity 11, that is, the general outline of the inner wall surface of the discharge channel 81 is located within the projection of the inner wall surface of the inner cavity 11, and the effective cross-sectional area of the discharge channel 81 formed in the discharge pipe 80 is smaller than the effective cross-sectional area of the inner cavity 11. Due to the relatively small effective cross-sectional area in the discharge pipe 80, the space available for the flow of the material increases when the material enters the discharge channel 81 from the inner cavity 11, thereby controlling the output speed of the material, prolonging the residence time of the material in the inner cavity 11, and thereby improving the adsorption efficiency of the magnetic needle 20 on the ferromagnetic impurities in the material. In some examples, the size and shape of the feed pipe 60 and the discharge pipe 80 can be the same.

[0163] In some examples, the housing has an upper end and a lower end, the first wall is arranged close to the upper end of the housing, and the second wall is arranged close to the lower end of the housing; the discharge pipe 80 has a third outer surface 82, the third outer surface 82 is located on the same side of the housing as the first wall 12, and the outer surface of the second wall 13 is arranged protruding relative to the third outer surface 82. Taking the horizontal arrangement of the discharge pipe 80 as an example, the upper end surface of the discharge pipe 80 is the third outer surface 82, the distance between the discharge pipe 80 and the horizontal plane is the third distance, and the third distance is smaller than the distance between the first wall 12 and the horizontal plane. The distance between the outer surface of the first wall 12 and the horizontal plane is the second distance, and the third distance is smaller than the second distance, so that the flow rate of the material flowing to the discharge channel 81 is reduced, thereby more material is blocked in the inner cavity 11, thereby prolonging the residence time of the material in the inner cavity 11. Since the position of the discharge pipe 80 is lower than that of the first wall 12, a gap is formed between the first wall 12 and the upper liquid level of the material, thereby preventing the material from affecting the upper end of the magnetic needle 20.

[0164] In some examples, the discharge pipe 80 has a fourth outer surface 83, the fourth outer surface 83 is located on the same side of the housing as the second wall 13, and the fourth outer surface 83 is flush with the outer surface of the second wall 13. Taking the horizontal arrangement of the discharge pipe 80 as an example, the lower end surface of the discharge pipe 80 is the fourth outer surface 83, and the fourth outer surface 83 of the discharge channel 81 is on the same plane as the outer surface of the second wall 13. When installing the impurity removal device, the fourth outer surface 83 of the discharge pipe 80 and the second wall 13 can be installed on the same platform, thereby facilitating the installation of the discharge pipe 80 and the second wall on the same plane, thereby facilitating the installation. By supporting the lower end surface of the discharge pipe 80 and the second wall 13 on the same platform, the material in the discharge channel 81 and the inner cavity 11 can be supported, preventing deformation of the discharge pipe 80 or the inner cavity 11.

[0165] In some examples, the material impurity removing device further comprises a second transition pipe 90, a second transition channel 91 is formed in the second transition pipe 90, and the discharge channel 81 is connected with the inner cavity 11 through the second transition channel 91; the inner diameter of the second transition channel 91 gradually decreases along the flow direction of the material. One end of the second transition pipe 90 is connected with the discharge pipe 80, and the other end of the second transition pipe 90 is connected with the shell 10, so that the inner cavity 11, the second transition channel 91 and the discharge channel 81 are sequentially connected.

[0166] The gradually decreasing inner diameter of the second transition channel 91 means that the cross-sectional area of the second transition channel 91 gradually decreases along the flow direction of the material, so that the space for the movement of the material gradually decreases during the flow of the material. By gradually reducing the flow space of the material, the flow speed of the material can be slowly reduced, so as to prevent vortex flow of the material when entering the discharge channel 81, and to help ensure the output efficiency of the material.

[0167] In some examples, the area ratio of the inner cavity 11 to the discharge channel 81 in a planar projection of the shell 10 and the discharge pipe 80 in a direction perpendicular to the flow direction of the material is not greater than 2 and not less than 1.5. The shell 10 and the discharge pipe 80 form a projection of the cross section for the flow of the material of the discharge channel 81 and the inner cavity 11 in a planar projection in a direction perpendicular to the flow direction of the material. By making the area ratio of the cross section of the inner cavity 11 to the cross section of the discharge channel 81 not greater than 2, the internal space of the inner cavity 11 can be fully utilized to prevent the inner cavity 11 from being too large and the discharge channel 81 from being too small, which reduces the output speed of the material and causes the material in the inner cavity 11 to be unable to be normally output. By making the area ratio of the cross section of the inner cavity 11 to the cross section of the discharge channel 81 not less than 1.5, the magnetic needle 20 can be conveniently placed in the inner cavity 11 through the space formed by the discharge channel 81, so that the installation of the magnetic needle 20 can be facilitated. The area ratio of the cross section of the inner cavity 11 to the cross section of the discharge channel 81 can be 2, 1.95, 1.85, 1.75, 1.65 or 1.5, or any value within the above range.

[0168] Based on the above-described impurity removing device, the application further provides an example of a battery material processing equipment, which comprises the material impurity removing device according to any one of the above-described examples.

[0169] By using the above-described impurity removing device to remove the ferromagnetic impurities in the material, the quality of the material can be effectively improved, the removal efficiency of the ferromagnetic impurities in the material can be improved, and the processing quality of the battery can be improved, thereby effectively improving the use safety of the electrical equipment.

[0170] It is worth noting that since the example of the battery material processing equipment in the present application is based on the above examples of the impurity removal device, the example of the battery material processing equipment in the present application includes all the technical solutions of all the examples of the impurity removal device, and the technical effects achieved are also completely the same, which will not be repeated here.

[0171] Please refer to Figures 1 to 7 In some examples, an impurity removal device for removing ferromagnetic impurities in a material is disclosed. The impurity removal device has a housing 10 and a plurality of sets of suction accessories 200. The housing 10 is formed with an inner cavity 11, an input end and an output end communicating with the inner cavity 11. The material enters the inner cavity 11 through the input end and is output to the outside of the housing 10 through the output end. The plurality of sets of suction accessories 200 are arranged at intervals along the flow direction of the material. Each set of suction accessories 200 is provided with a plurality of magnetic needles 20 arranged at intervals in a first direction. The magnetic needles 20 of adjacent sets of suction accessories 200 are arranged at intervals in the flow direction of the material. When the material flows in the inner cavity 11, the material needs to be diverted when flowing from the gap between the upstream magnetic needles 20 to the gap between the downstream magnetic needles 20. Thus, the material can be in contact with the magnetic needles 20, thereby prolonging the contact time of the material with the magnetic needles 20 and allowing the magnetic needles 20 to fully adsorb the ferromagnetic impurities in the material. Further, a detection mechanism 30 is arranged at the lower end of the magnetic needle 20 for detecting the amount of ferromagnetic impurities adsorbed on the magnetic needle 20. When the amount of ferromagnetic impurities attached to the magnetic needle 20 reaches a certain range, the magnetic needle 20 can be removed from the housing 10 for cleaning or replacement. The detection mechanism 30 can be used to detect the weight of the ferromagnetic impurities adsorbed on the magnetic needle 20 or the enrichment degree of the ferromagnetic impurities.

[0172] Further, a feeding pipe 60 and a first transition pipe 70 are arranged at one end of the housing 10. The first transition pipe 70 is arranged between the feeding pipe 60 and the housing 10, and the first transition pipe 70 forms a first transition passage 71 arranged in a gradually expanding manner, so that the material can enter the inner cavity 11 in a dispersed state, thereby allowing the material to fully contact the magnetic needles 20 and helping to improve the adsorption efficiency of the ferromagnetic impurities. Further, a second transition pipe 90 and a discharging pipe 80 are arranged at the other end of the housing 10. The second transition pipe 90 forms a second transition passage 91 arranged in a gradually reducing inner diameter, so as to control the output speed of the material, thereby prolonging the residence time of the material in the inner cavity 11, so that the ferromagnetic impurities in the material can fully contact the magnetic needles 20, thereby improving the removal efficiency of the ferromagnetic impurities.

[0173] In the present example, the maximum outer diameter of the magnetic needle 20 is between 1mm and 100mm, and the distance between adjacent magnetic needles 20 is between 1mm and 100mm, so that the density of the magnetic needles 20 reaches a predetermined range. The magnetic needles 20 can be relatively dense, and the flow speed of the material can be easily controlled.

[0174] The above merely provides the optional examples of the present application, and does not limit the patent scope of the present application. Any equivalent structure variations made according to the present application, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A material impurity removal device for adsorbing ferromagnetic impurities in a material, wherein, The material impurity removing device comprises: a housing having a first wall and a second wall arranged oppositely; an inner cavity is formed between the first wall and the second wall for the material to flow through; and a suction accessory at least partially located in the inner cavity; the suction accessory is connected to the first wall and extends towards the second wall; the flow direction of the material intersects with the extending direction of the suction accessory.

2. The material impurity removal device of claim 1, wherein, The number of the suction accessories is multiple groups; at least two groups of the suction accessories are arranged at intervals along the flow direction of the material.

3. The material impurity removal device of claim 2, wherein, At least two groups of the suction accessories are arranged at intervals along the flow direction of the material.

4. The material impurity removal device of any one of claims 1 to 3, wherein, The extending direction of the suction accessory is perpendicular to the plane in which the second wall is located.

5. The material impurity removal device of any one of claims 1 to 4, wherein, The suction accessory is detachably connected to the first wall.

6. The material impurity removal device of any one of claims 1 to 5, wherein, The suction accessory comprises multiple magnetic needles arranged at intervals along a first direction; the magnetic needles are connected to the first wall and extend towards the second wall; the flow direction of the material intersects with the first direction.

7. The material impurity removal device of claim 6, wherein, At least two groups of the magnetic needles of the suction accessories are arranged at intervals along the flow direction of the material.

8. The material impurity removal device of claim 7, wherein, The magnetic needles of any two adjacent groups of the suction accessories are at least partially arranged at intervals along the flow direction of the material.

9. A material impurity removal device as claimed in any one of claims 5 to 8, wherein, The material impurity removing device further comprises: a detection mechanism arranged in the housing and used for detecting the adsorption amount of the ferromagnetic impurities on the magnetic needles.

10. The material impurity removal device of claim 9, wherein, The adsorption amount of the ferromagnetic impurities on the magnetic needles is the weight of the ferromagnetic impurities; the detection mechanism is a weight detection assembly; and the weight detection assembly is used for detecting the weight of the ferromagnetic impurities on the magnetic needles.

11. The material impurity removal device of claim 10, wherein, The magnetic needles extend along a vertical direction; the weight detection assembly is arranged at the lower end of the magnetic needles; or the weight detection assembly is in the form of a ring body and is sleeved on the magnetic needles.

12. The material impurity removal device of claim 9, wherein, The adsorption amount of the ferromagnetic impurities on the magnetic needles is the enrichment degree of the ferromagnetic impurities; the detection mechanism is a magnetic field detection assembly; and the magnetic field detection assembly is used for detecting the enrichment degree of the ferromagnetic impurities on the magnetic needles under the corresponding magnetic field intensity.

13. A material impurity removal device as claimed in any one of claims 6 to 12, wherein, The end of the magnetic needle away from the first wall is fixedly connected to the second wall.

14. The material impurity removal device of claim 13, wherein, The second wall is provided with a fixing member; the fixing member is provided with a positioning groove; and the magnetic needle is inserted into the positioning groove.

15. The material impurity removal device of any one of claims 6 to 14, wherein, Each magnetic needle of the suction accessory is detachably connected to the first wall.

16. The material impurity removal device of claim 15, wherein, The first wall is provided with a mounting hole; and the magnetic needle is inserted into the mounting hole.

17. The material impurity removal device of claim 16, wherein, The magnetic needle is sealingly connected to the mounting hole.

18. The material impurity removal device of any one of claims 6 to 17, wherein, The maximum outer circumferential diameter of the magnetic needle is not less than 1 mm and not more than 100 mm.

19. The material impurity removal device of any one of claims 6 to 18, wherein, The distance between adjacent magnetic needles is not less than 1 mm and not more than 100 mm.

20. The material impurity removal device of any one of claims 1 to 19, wherein, The housing further comprises a third wall and a fourth wall arranged oppositely; the first wall, the third wall, the second wall and the fourth wall are sequentially connected and surround to form the inner cavity.

21. The material impurity removal device of claim 20, wherein, The third wall is detachably connected to the first wall; and / or The fourth wall is detachably connected to the first wall.

22. The material impurity removal device of any one of claims 1 to 21, wherein, The material impurity removing device further comprises: a feeding pipe connected to the housing; the feeding pipe forms a feeding channel communicating with the inner cavity; and in the plane projection of the feeding pipe and the housing in the direction perpendicular to the flow direction of the material, the projection of the feeding channel falls within the projection of the inner wall surface of the inner cavity.

23. The material impurity removal device of claim 22, wherein, The first wall is arranged close to the upper end of the shell, and the second wall is arranged close to the lower end of the shell; the feeding pipe has a first outer surface, which is on the same side of the shell as the first wall, and the outer surface of the first wall is arranged protruding relative to the first outer surface.

24. The material impurity removal device of claim 22 or 23, wherein, The first wall and the second wall are arranged opposite along a vertical direction, the first wall is arranged close to the upper end of the shell, and the second wall is arranged close to the lower end of the shell; the feeding pipe has a first inner surface, which is on the same side of the shell as the first wall, and along the vertical direction, the distance between the inner surface of the first wall and the second wall is greater than the distance between the first inner surface and the second wall.

25. The material impurity removal device of any one of claims 22 to 24, wherein, The feeding pipe has a second outer surface, which is on the same side of the shell as the second wall, and the second outer surface is arranged flush with the outer surface of the second wall.

26. The material impurity removal device of any one of claims 22 to 25, wherein, The material impurity removal device further comprises: A first transition pipe is arranged between the feeding pipe and the shell, and a first transition passage is formed in the first transition pipe, and the feeding passage is connected with the inner cavity through the first transition passage. Along the flow direction of the material, the inner diameter of the first transition passage is gradually increased.

27. The material impurity removal device of any one of claims 22 to 26, wherein, In a planar projection of the shell and the feeding pipe in a direction perpendicular to the flow direction of the material, the area ratio of the inner cavity to the feeding passage is not greater than 2 and not less than 1.

5.

28. The material impurity removal device of any one of claims 1 to 27, wherein, The material impurity removal device further comprises: A discharge pipe is connected with the shell, and a discharge passage is formed in the discharge pipe to communicate with the inner cavity; in a planar projection of the discharge pipe and the shell in a direction perpendicular to the flow direction of the material, the projection of the discharge passage falls within the projection of the inner wall surface of the inner cavity.

29. The material impurity removal device of claim 28, wherein, The discharge pipe has a third outer surface, which is on the same side of the shell as the first wall, and the outer surface of the first wall is arranged protruding relative to the third outer surface.

30. The material impurity removal device of claim 28 or 29, wherein, The shell has an upper end and a lower end, the first wall is arranged close to the upper end of the shell, and the second wall is arranged close to the lower end of the shell; the discharge pipe has a fourth outer surface, which is on the same side of the shell as the second wall, and the fourth outer surface is arranged flush with the outer surface of the second wall.

31. The material impurity removal device of any one of claims 28 to 30, wherein, The material impurity removal device further comprises: A second transition pipe is arranged between the shell and the discharge pipe, and a second transition passage is formed in the second transition pipe, and the discharge passage is connected with the inner cavity through the second transition passage. Along the flow direction of the material, the inner diameter of the second transition passage is gradually reduced.

32. The material impurity removal device of any one of claims 28 to 31, wherein, In a planar projection of the shell and the discharge pipe in a direction perpendicular to the flow direction of the material, the area ratio of the inner cavity to the discharge passage is not greater than 2 and not less than 1.

5.

33. A battery material processing apparatus, wherein, The material impurity removal device comprises any one of claims 1 to 32.

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