Magnetic separation equipment for extracting magnetic impurities in powder material by dry method

Abstract

The invention provides magnetic separation equipment for extracting magnetic impurities in a powder material by a dry method, and relates to the field of magnetic separation equipment. The magnetic separation equipment for extracting the magnetic impurities in the powder material through the dry method comprises a magnetic separation tank, a first ventilation cap and a magnetic rod assembly. The magnetic separation tank is provided with a containing space and an opening communicated with the containing space, a plurality of first ventilation pipes communicated with the containing space are arranged on the side wall of the magnetic separation tank at intervals in the tangential direction, the magnetic separation tank is further provided with a plurality of second ventilation pipes facing the center of the containing space, and the first ventilation pipes and the second ventilation pipes are configured to be connected with air supply equipment. The first ventilation cap is arranged on the magnetic separation tank and communicated with the containing space so as to exhaust air outwards. The magnetic bar assembly is detachably installed in the opening and extends into the containing space. According to the magnetic separation equipment for extracting the magnetic impurities in the powder material by the dry method, powder can be magnetically separated by the dry method, magnetic separation process steps are reduced, efficiency can be improved, and materials can be saved.

Description

Technical Field

[0001] This invention relates to the field of magnetic separation equipment technology, and more specifically, to a magnetic separation device for dry extraction of magnetic impurities from powder materials. Background Technology

[0002] In lithium battery manufacturing, powder demagnetizing materials are a crucial process step that directly affects the battery's safety, consistency, and final performance. Powder demagnetizing materials can be used to remove magnetic metallic foreign objects (such as iron, nickel, chromium, and their alloy particles) from powders containing positive and negative electrode materials and conductive agents. This prevents them from piercing the separator and causing internal short circuits in the battery, thus avoiding serious safety issues such as self-discharge, overheating, fire, and even explosion.

[0003] In the existing technology, the extraction of metallic foreign matter from lithium battery powder materials adopts a stepwise wet process: for magnetic impurities such as iron, chromium, and nickel, the powder material needs to be mixed with demagnetized pure water in a can mill, and then extracted by the adsorption of a magnetic rod fitted with a heat shrink tube; afterwards, drying and sieving are also required, and the whole process is inefficient. Summary of the Invention

[0004] The present invention aims to provide a magnetic separation device for dry extraction of magnetic impurities from powder materials, which can perform magnetic separation of powders by dry method, reduce magnetic separation process steps, improve efficiency and save materials.

[0005] The embodiments of the present invention can be implemented as follows: This invention provides a magnetic separation device for dry extraction of magnetic impurities from powder materials, comprising: A magnetic separator tank has a accommodating space and an opening communicating with the accommodating space. The sidewall of the magnetic separator tank is provided with a plurality of first vent pipes communicating with the accommodating space at intervals along the tangential direction. The magnetic separator tank is also provided with a second vent pipe facing the center of the accommodating space. The first vent pipe and the second vent pipe are configured to connect to an air supply device. A first ventilation cap, disposed in the magnetic separator tank and communicating with the accommodating space, is configured to exhaust air outwards; and A magnetic rod assembly, which is detachably mounted in the opening and extends into the receiving space.

[0006] In an optional embodiment, the magnetic rod assembly includes a magnetic rod, a magnetic rod plug, and a magnetic rod clip. The magnetic rod plug is fitted onto the top of the magnetic rod to achieve a seal between the opening sidewall and the magnetic rod; The magnetic rod quick-clamp is installed on the magnetic rod and engages with the magnetic separator.

[0007] In an optional embodiment, the magnetic separation equipment for dry extraction of magnetic impurities from powder materials further includes a filter tank; The filter tank has a filtration space and an inlet and an outlet connected to the filtration space. The bottom of the magnetic separator is provided with a connection port, which is connected to the feed port through a first pipe. The first pipe is provided with a first control valve to control the opening and closing of the first pipe. The filter tank is equipped with a filter screen. The filter screen divides the filtration space into an upper space and a lower space. The feed inlet is connected to the upper space, and the discharge outlet is connected to the lower space. The lower space is provided with an air blowing component that blows air onto the filter screen; The filter canister is connected to a second ventilation cap.

[0008] In an optional embodiment, the filter tank includes an upper part and a lower part, the inlet is located in the upper part, the outlet is located in the lower part, the upper part and the lower part are detachably assembled by clamps, and the filter screen is snapped between the upper part and the lower part.

[0009] In an optional embodiment, the air blowing assembly includes a main pipe and a plurality of branch pipes connected to the periphery of the main pipe. Each branch pipe has an air blowing hole on one side corresponding to the filter screen. The main pipe is used to connect to an air supply device.

[0010] In an optional embodiment, the magnetic separation device for dry extraction of magnetic impurities from powder materials further includes a first dust collector and a first fan; The first dust collector is connected to the filter tank through a second pipe and communicates with the upper space. The second pipe is equipped with a second control valve to control the opening and closing of the second pipe. The first fan is connected to the first dust collector; The first dust collector is equipped with a first material collection tank at its discharge port.

[0011] In an optional embodiment, the magnetic separation equipment for dry extraction of magnetic impurities from powder materials further includes a second dust collector and a second fan. The second dust collector is connected to the discharge port via a third pipe, and the third pipe is equipped with a third control valve to control the opening and closing of the third pipe; The second fan is connected to the second dust collector; The second dust collector is equipped with a second material collection tank at its discharge port.

[0012] In an optional embodiment, the portion of the first pipeline located near the magnetic separator tank from the first control valve is connected to a fourth pipeline, which is used to connect to a gas supply device, and the fourth pipeline is equipped with a fourth control valve.

[0013] In an optional embodiment, the first ventilation cap is connected to a fifth pipe that communicates with an air supply device, and the fifth pipe is equipped with a fifth control valve.

[0014] In an optional embodiment, the magnetic separator is spherical, the second vent pipe is arranged radially along the magnetic separator, and the second vent pipe is arranged near the bottom of the magnetic separator and near the middle of the magnetic separator.

[0015] The beneficial effects of the magnetic separation equipment for dry extraction of magnetic impurities from powder materials provided in this invention include: This application involves tangentially spaced multiple first vent pipes communicating with a containing space along the side wall of a magnetic separator tank, and a second vent pipe facing the center of the containing space. The first and second vent pipes are configured to connect to an air supply device and cooperate with a first ventilation cap. This allows the first vent pipes to blow air through the powder in the containing space, causing it to rotate, while the second vent pipes blow air through the powder towards the center. This allows the powder to better contact the magnetic rod assembly, enabling the magnetic rod assembly to more effectively adsorb magnetic metallic impurities in the powder, thus improving the quality of impurity removal. Furthermore, this method does not require the addition of water and can be used directly after impurity removal, resulting in higher impurity removal efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a simplified schematic diagram of a magnetic separation device for dry extraction of magnetic impurities from powder materials provided in this embodiment. Figure 2 This is a schematic diagram of the first air vent of the magnetic separation device for dry extraction of magnetic impurities from powder materials provided in this embodiment.

[0018] Icons: 100 - Magnetic separation equipment for dry extraction of magnetic impurities from powder materials; 110 - Magnetic separation tank; 111 - Accommodation space; 112 - Opening; 113 - First vent pipe; 114 - Second vent pipe; 115 - Connection port; 120 - First ventilation cap; 121 - Fifth pipe; 122 - Fifth control valve; 130 - Magnetic rod assembly; 131 - Magnetic rod; 132 - Magnetic rod plug; 133 - Magnetic rod quick clamp; 140 - Filter tank; 141 - Filter space; 142 - Feed inlet; 143 - Discharge outlet; 144 - First pipe; 145 - First control valve; 146-Filter screen; 147-Upper space; 148-Lower space; 149-Blowing assembly; 151-Upper part; 152-Lower part; 153-Main pipe; 154-Branch pipe; 155-Fourth pipe; 156-Fourth control valve; 170-Second ventilation cap; 181-First dust collector; 182-First fan; 183-Second pipe; 184-Second control valve; 185-First collection tank; 191-Second dust collector; 192-Second fan; 193-Third pipe; 194-Third control valve; 195-Second collection tank. Detailed Implementation

[0019] In the existing technology, the extraction of metallic foreign matter from lithium battery powder materials adopts a stepwise wet process: for magnetic impurities such as iron, chromium, and nickel, the powder material needs to be mixed with demagnetized pure water in a can mill, and then extracted by the adsorption of a magnetic rod fitted with a heat shrink tube; afterwards, drying and sieving are also required, and the whole process is inefficient.

[0020] To address the aforementioned problems, this invention provides a magnetic separation device for dry extraction of magnetic impurities from powder materials. This device can perform magnetic separation of powders using a dry method, reducing the number of magnetic separation process steps and improving efficiency while saving materials.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0025] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0026] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0027] The following detailed description of the overall structure, working principle, and technical effects of the magnetic separation device 100 for dry extraction of magnetic impurities from powder materials provided by the present invention, through embodiments and in conjunction with the accompanying drawings.

[0028] Please refer to Figure 1 The present invention provides a magnetic separation device 100 for dry extraction of magnetic impurities in powder materials. This magnetic separation device 100 can extract magnetic metallic foreign impurities in powder materials by dry extraction.

[0029] Please refer to Figure 1 and Figure 2 In this embodiment, the magnetic separation device 100 for dry extraction of magnetic impurities from powder materials includes a magnetic separation tank 110, a first ventilation cap 120, and a magnetic rod assembly 130. The magnetic separation tank 110 has a receiving space 111 and an opening 112 communicating with the receiving space 111. The opening 112 is used for adding powder into the magnetic separation tank 110 and installing the magnetic rod assembly 130. A plurality of first vent pipes 113 communicating with the receiving space 111 are tangentially spaced along the sidewall of the magnetic separation tank 110. The magnetic separation tank 110 also has a plurality of second vent pipes 114 facing the center of the receiving space 111, and the first vent pipes 113 and second vent pipes 114 are configured to connect to an air supply device. The first ventilation cap 120 is disposed in the magnetic separation tank 110 and communicates with the receiving space 111, configured to exhaust air outwards. The magnetic rod assembly 130 is detachably mounted in the opening 112 and extends into the receiving space 111.

[0030] This embodiment features multiple first vent pipes 113 tangentially spaced along the side wall of the magnetic separator 110, communicating with the containing space 111. A second vent pipe 114 is also provided in the magnetic separator 110, facing the center of the containing space 111. The first and second vent pipes 113 and 114 are configured to connect to an air supply device and cooperate with a first ventilation cap 120. The first vent pipes 113 blow air through the powder in the containing space 111, causing it to rotate, while the second vent pipes 114 blow air through the powder towards the center. This allows the powder to better contact the magnetic rod assembly 130, enabling the magnetic rod assembly 130 to more effectively adsorb magnetic metal impurities in the powder, thus improving the quality of impurity removal. Furthermore, this method does not require the addition of water and can be used directly after impurity removal, resulting in higher impurity removal efficiency.

[0031] Specifically, since the second vent pipe 114 is oriented towards the center of the accommodating space 111, the introduction of compressed gas into the second vent pipe 114 allows the powder added to the magnetic separator 110 to float within the accommodating space 111, preventing the powder from accumulating at the bottom. Meanwhile, the first vent pipe 113 is tangentially spaced along the side wall of the magnetic separator 110, allowing the floating powder to rotate fully. Under the combined action of these two airflows, the powder forms a composite motion state of rotating and surging towards the center, increasing the overall contact opportunity between the powder and the magnetic rod assembly 130, enabling the magnetic rod assembly 130 to more effectively adsorb magnetic metal impurities in the powder.

[0032] It should be noted that the magnetic rod assembly 130 is the core component for capturing magnetic impurities, and it is inserted into the center of the magnetic separator 110 via the opening 112. The first ventilation cap 120 serves as an exhaust port, communicating with the external atmosphere to ensure gas circulation within the magnetic separator 110 and preventing dust escape or internal turbulence. The magnetic rod assembly 130 is detachable for easy cleaning.

[0033] Please refer to Figure 1 and Figure 2 In this embodiment, the magnetic rod assembly 130 includes a magnetic rod 131, a magnetic rod plug 132, and a magnetic rod clip 133. The magnetic rod plug 132 is sleeved on the top of the magnetic rod 131 to achieve a seal between the sidewall of the opening 112 and the magnetic rod 131. The magnetic rod clip 133 is installed on the magnetic rod 131 and engages with the magnetic separator tank 110.

[0034] In this embodiment, the magnetic rod assembly 130 is composed of three parts: magnetic rod 131, magnetic rod plug 132, and magnetic rod quick clip 133. The magnetic rod plug 132 can better achieve the seal between the magnetic rod 131 and the opening 112, while the magnetic rod quick clip 133 can quickly achieve assembly and disassembly.

[0035] It should be noted that the magnetic rod quick-clamp 133 can be a clamp, which engages with the flange of the opening 112 and the flange of the magnetic rod 131. Of course, the magnetic rod quick-clamp 133 can also have other engagement structures. The magnetic rod plug 132 can be a cylindrical structure that is smaller at the bottom and larger at the top. After the magnetic rod 131 is inserted, it will fit tightly against the outer wall of the magnetic rod 131 and the inner wall of the opening 112, forming an effective sealing ring. This ensures that when compressed gas is subsequently introduced for sorting, the airflow and powder are confined within the working area and will not leak from the top, thereby maintaining a stable sorting environment and ensuring operational safety.

[0036] In this embodiment, the magnetic separator 110 is spherical, the second vent pipe 114 is arranged radially along the magnetic separator 110 and is located near the bottom of the magnetic separator 110, and the first vent pipe 113 is located near the middle of the magnetic separator 110.

[0037] In this embodiment, the magnetic separator 110 is spherical. When the tangential airflow from the first vent pipe 113 is introduced, the airflow and powder can form a stable and continuous rotating flow field along the smooth curved surface, reducing turbulence and dead zones, making the powder movement smoother and more sustainable. The second vent pipe 114 is positioned close to the bottom, directly acting on the bottom area where powder is most easily deposited, blowing up the powder and preventing it from being unable to participate in the separation due to deposition. Overall, the first vent pipe 113 and the second vent pipe 114 form a high-low air supply combination, improving the dispersion effect on the powder, thus allowing the magnetic rod 131 to better capture the magnetic powder.

[0038] The function of the first ventilation cap 120 is to separate gas and powder. The first ventilation cap 120 is equipped with a filter element, which can prevent powder from overflowing and allow gas to be discharged, thereby establishing an exhaust channel for the magnetic separator 110. The first ventilation cap 120 can be an existing exhaust filter unit.

[0039] Furthermore, the first ventilation cap 120 is connected to a fifth pipe 121 that communicates with the air supply equipment, and the fifth pipe 121 is equipped with a fifth control valve 122. The magnetic separator 110 is equipped with a first pressure gauge.

[0040] Since the first ventilation cap 120 separates air and powder through the filtration of the filter element, the powder will clog the filter element during continuous exhaust, resulting in poor exhaust. In this embodiment, the first ventilation cap 120 is connected to a fifth pipe 121 that communicates with the air supply equipment, and a fifth control valve 122 is set. When the pressure of the first pressure gauge exceeds the set pressure, it indicates that the filter element in the first ventilation cap 120 is blocked by powder. The air supply to the first vent pipe 113 and the second vent pipe 114 can be closed, and the fifth control valve 122 can be opened. The powder blocking the filter element can be blown away by backflushing, thereby cleaning the first ventilation cap 120.

[0041] Secondly, to control the powder suspension state during magnetic separation, electrically controlled valves (such as solenoid valves) are installed at the air inlets of the first air pipe 113 and the second air pipe 114. This allows for time-coordinated, alternating, or intermittent air supply operations between the two sets of air paths, as well as adjustment of the air flow rate, thereby matching the optimal and most efficient airflow pattern for the separation process.

[0042] Furthermore, the bottom of the magnetic separator 110 is provided with a connection port 115, which is used to connect a pipe for discharging material outward. The connection port 115 is located at the very bottom of the magnetic separator 110.

[0043] Generally, after magnetic separation, sieving is required to obtain powder with the desired particle size distribution. Please refer to... Figure 1 and Figure 2 In this embodiment, the magnetic separation device 100 for dry extraction of magnetic impurities from powder materials further includes a filter tank 140. The filter tank 140 has a filtration space 141 and an inlet 142 and an outlet 143 communicating with the filtration space 141. A connection port 115 is connected to the inlet 142 via a first pipe 144, and the first pipe 144 is equipped with a first control valve 145 for controlling the opening and closing of the first pipe 144. A filter screen 146 is disposed inside the filter tank 140. The filter screen 146 divides the filtration space 141 into an upper space 147 and a lower space 148. The inlet 142 communicates with the upper space 147, and the outlet 143 communicates with the lower space 148. An air blowing assembly 149 for blowing air onto the filter screen 146 is disposed in the lower space 148. A second ventilation cap 170 is connected to the filter tank 140.

[0044] In this embodiment, a filter tank 140 is connected to the connection port 115 of the magnetic separator 110, and a filter screen 146 is installed in the filter tank 140. This allows for further sieving of the magnetically separated powder, thereby selecting powder that meets the particle size distribution requirements. The air blowing assembly 149 is provided so that if the filter screen 146 becomes clogged during the sieving process, air can be blown upwards from the bottom of the filter screen 146 to improve the problem of filter screen clogging and insufficient sieving.

[0045] Secondly, the structure of the second ventilation cap 170 is basically the same as that of the first ventilation cap 120, and it is also connected to a backflush pipe to improve the problem of blockage, which will not be described in detail here.

[0046] Furthermore, to facilitate the replacement of filter screen 146 as needed, the filter tank 140 includes an upper part 151 and a lower part 152. The inlet 142 is located in the upper part 151, and the outlet 143 is located in the lower part 152. The upper part 151 and the lower part 152 are detachably assembled via clamps. Filter screen 146 is snapped between the upper part 151 and the lower part 152. The clamps provide force to achieve a seal between the upper part 151, the lower part 152, and the filter screen 146. Filter screen 146 and the lower part 152 enclose a lower space 148, and filter screen 146 and the upper part 151 enclose an upper space 147. When replacing filter screen 146, the clamps can be opened to separate the upper part 151 and the lower part 152, allowing the filter screen 146 clamped between them to be removed and replaced with a suitable filter screen 146.

[0047] Specifically, the air blowing assembly 149 includes a main pipe 153 and multiple branch pipes 154 connected to the periphery of the main pipe 153. Each branch pipe 154 has a number of air blowing holes on one side corresponding to the filter screen 146. The main pipe 153 is used to connect to the air supply equipment.

[0048] In this embodiment, multiple branch pipes 154 are connected around the main pipe 153, which facilitates the uniform blowing of air onto the filter screen 146.

[0049] Specifically, the main pipe 153 extends into the filter tank 140 from the side wall of the lower portion 152 and extends upward from the center. Branch pipes 154 are connected to the side wall and extend outward and upward at an angle to the periphery. The main pipe 153 can be connected to the air supply equipment via an electrically controlled valve, which can be opened to achieve reverse air blowing when needed. Reverse air blowing can be intermittently activated.

[0050] Please refer to Figure 1 and Figure 2 Furthermore, the magnetic separation device 100 for dry extraction of magnetic impurities from powder materials also includes a first dust collector 181 and a first fan 182. The first dust collector 181 is connected to the filter tank 140 via a second pipe 183 and communicates with the upper space 147. The second pipe 183 is equipped with a second control valve 184 for controlling the opening and closing of the second pipe 183. The first fan 182 is connected to the first dust collector 181. The discharge port of the first dust collector 181 is equipped with a first collection tank 185.

[0051] In this embodiment, by setting up a first dust collector 181 and a first fan 182, after screening is completed, the second control valve 184 and the first fan 182 can be opened. The negative pressure generated by the first fan 182 will draw the powder that cannot be screened above the filter screen 146 into the first dust collector 181. The first dust collector 181 realizes the separation of air and powder, so that the powder is collected in the first collection tank 185, thereby facilitating the collection of powder.

[0052] It should also be noted that during the process of collecting powder above the filter screen 146 by opening the second control valve 184 and the first fan 182, the air blowing assembly 149 can also be opened to blow air, so that the powder above the filter screen 146 is suspended, making it easier for the negative pressure generated by the first fan 182 to draw the powder into the first dust collector 181. The air blowing assembly 149 can be opened continuously or intermittently.

[0053] Please refer to Figure 1 and Figure 2 In this embodiment, the magnetic separation device 100 for dry extraction of magnetic impurities from powder materials further includes a second dust collector 191 and a second fan 192. The second dust collector 191 is connected to the discharge port 143 via a third pipe 193, and the third pipe 193 is equipped with a third control valve 194 for controlling the opening and closing of the third pipe 193. The second fan 192 is connected to the second dust collector 191. The discharge port of the second dust collector 191 is equipped with a second collection tank 195.

[0054] In this embodiment, by setting up a second dust collector 191 and a second fan 192, after screening is completed, the third control valve 194 and the second fan 192 can be opened. The negative pressure generated by the second fan 192 will draw the powder that meets the requirements screened below the filter screen 146 into the second dust collector 191. The second dust collector 191 realizes the separation of air and powder, so that the powder is collected in the first collection tank 185, thereby facilitating the collection of powder.

[0055] It should be noted that the discharge port 143 is located at the bottom of the filter tank 140, which makes it easier for the screened powder to be completely sucked into the second dust collector 191.

[0056] In this embodiment, both the first dust collector 181 and the second dust collector 191 are bag-type dust collectors. Of course, in other embodiments of this application, the first dust collector 181 and the second dust collector 191 may also be other types of gas-powder separation equipment. Furthermore, the first dust collector 181, the second dust collector 191, and the filter tank 140 are all equipped with pressure gauges to detect the pressure during operation and determine whether any blockages have occurred.

[0057] Furthermore, the portion of the first pipe 144 located near the magnetic separator tank 110 of the first control valve 145 is connected to a fourth pipe 155, which is used to connect to the gas supply equipment. The fourth pipe 155 is equipped with a fourth control valve 156.

[0058] In this embodiment, a fourth pipe 155 is connected to the first pipe 144, and a fourth control valve 156 is installed in the fourth pipe 155. Since the bottom of the magnetic separator 110 is the connection port 115, during magnetic separation, compressed air can be intermittently introduced into the first pipe 144 by intermittently opening the fourth control valve 156. This, combined with the first air vent 113 and / or the second air vent 114, can better facilitate powder movement and further avoid powder deposition. In particular, it prevents powder deposition in the first pipe 144, thus avoiding the problem of insufficient magnetic separation.

[0059] Please refer to Figure 1 and Figure 2 The working process of the magnetic separation device 100 for dry extraction of magnetic impurities from powder materials provided in this embodiment is as follows: Phase 1: Magnetic Separation (1) First open the magnetic rod quick clip 133, take out the magnetic rod 131 and the magnetic rod plug 132 together through the opening 112, pour the material into the magnetic separator tank 110 through the opening 112, then plug the magnetic rod plug 132, insert the magnetic rod 131 with heat shrink sleeve through the magnetic rod plug 132 into the magnetic separator tank 110, and then fix the two at the feed inlet 142 through the magnetic rod quick clip 133; (2) Open the fourth control valve 156, and then open the valves connected to the first vent pipe 113 and the second vent pipe 114 to disperse the material in the magnetic separator 110 at multiple angles; (3) Intermittently start the fifth control valve 122 connected to the first ventilation cap 120 to blow the particles in the first ventilation cap 120 back into the magnetic separator 110 to clean the first ventilation cap 120; (4) After about 15 minutes, stop the air supply to the magnetic separator 110 and wait for the material to stand still for 2 minutes before proceeding to the next stage.

[0060] Second stage: Screening (1) First, open the third control valve 194, then turn on the second fan 192 to generate negative pressure in the filter tank 140; (2) Open the first control valve 145. The powder in the magnetic separator 110 falls at a uniform speed. Particles smaller than the screen aperture pass through the screen, while particles larger than the aperture remain on the screen. The screened powder is adsorbed by the second blower 192 and transferred to the second dust collector 191 and the second collection tank 195, thus achieving particle separation. The separation time is about 10 minutes. During the separation, the air blowing component 149 can be operated intermittently. (3) When the separation is completed, stop the second fan 192, close the first control valve 145 and the third control valve 194, and open the second control valve 184 and the second fan 192 and supply air to the air blowing assembly 149 so that all the large particles on the screen are collected in the first collection tank 185 by the first dust collector 181.

[0061] In summary, this embodiment provides multiple first vent pipes 113 tangentially spaced along the side wall of the magnetic separator 110, communicating with the containing space 111. Furthermore, the magnetic separator 110 also includes a second vent pipe 114 facing the center of the containing space 111. The first and second vent pipes 113 and 114 are configured to connect to an air supply device and cooperate with the first ventilation cap 120. This allows the first vent pipes 113 to blow air through the powder in the containing space 111, causing it to rotate, while the second vent pipes 114 blow air through the powder towards the center. This allows the powder to better contact the magnetic rod assembly 130, enabling the magnetic rod assembly 130 to more effectively adsorb magnetic metal impurities in the powder, thus improving the quality of impurity removal. Moreover, this method does not require the addition of water and can be used directly after impurity removal, resulting in higher impurity removal efficiency.

[0062] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A magnetic separation device for dry extraction of magnetic impurities from powder materials, characterized in that, include: A magnetic separator (110) has a accommodating space (111) and an opening (112) communicating with the accommodating space (111). The sidewall of the magnetic separator (110) is provided with a plurality of first vent pipes (113) communicating with the accommodating space (111) at tangential intervals. The magnetic separator (110) is also provided with a plurality of second vent pipes (114) facing the center of the accommodating space (111). The first vent pipes (113) and the second vent pipes (114) are configured to connect to an air supply device. A first ventilation cap (120) is disposed in the magnetic separator (110) and communicates with the accommodating space (111) for exhausting air outwards; and, A magnetic rod assembly (130) is detachably mounted in the opening (112) and extends into the receiving space (111).

2. The magnetic separation equipment for dry extraction of magnetic impurities from powder materials according to claim 1, characterized in that, The magnetic rod assembly (130) includes a magnetic rod (131), a magnetic rod plug (132), and a magnetic rod fastener (133). The magnetic plug (132) is sleeved on the top of the magnetic rod (131) to achieve a seal between the side wall of the opening (112) and the magnetic rod (131); The magnetic rod fastener (133) is installed on the magnetic rod (131) and engages with the magnetic separator (110).

3. The magnetic separation equipment for dry extraction of magnetic impurities from powder materials according to claim 1, characterized in that, The magnetic separation equipment for dry extraction of magnetic impurities from powder materials also includes a filter tank (140). The filter tank (140) has a filter space (141) and an inlet (142) and an outlet (143) communicating with the filter space (141). The bottom of the magnetic separator (110) is provided with a connection port (115), and the connection port (115) is connected to the feed port (142) through a first pipe (144). The first pipe (144) is provided with a first control valve (145) for controlling the opening and closing of the first pipe (144). The filter tank (140) is equipped with a filter screen (146). The filter screen (146) divides the filtration space (141) into an upper space (147) and a lower space (148). The feed inlet (142) is connected to the upper space (147), and the discharge outlet (143) is connected to the lower space (148). The lower space (148) is provided with an air blowing assembly (149) for blowing air onto the filter (146). The filter canister (140) is connected to a second ventilation cap (170).

4. The magnetic separation equipment for dry extraction of magnetic impurities from powder materials according to claim 3, characterized in that, The filter tank (140) includes an upper part (151) and a lower part (152). The feed inlet (142) is located on the upper part (151), and the discharge outlet (143) is located on the lower part (152). The upper part (151) and the lower part (152) are detachably assembled by clamps. The filter screen (146) is snapped between the upper part (151) and the lower part (152).

5. The magnetic separation equipment for dry extraction of magnetic impurities from powder materials according to claim 3, characterized in that, The air blowing assembly (149) includes a main pipe (153) and a plurality of branch pipes (154) connected to the periphery of the main pipe (153). Each branch pipe (154) has an air blowing hole on one side corresponding to the filter screen (146). The main pipe (153) is used to connect to the air supply equipment.

6. The magnetic separation equipment for dry extraction of magnetic impurities from powder materials according to any one of claims 3-5, characterized in that, The magnetic separation equipment for dry extraction of magnetic impurities from powder materials also includes a first dust collector (181) and a first fan (182). The first dust collector (181) is connected to the filter tank (140) through the second pipe (183) and communicates with the upper space (147). The second pipe (183) is provided with a second control valve (184) to control the opening and closing of the second pipe (183). The first fan (182) is connected to the first dust collector (181); The first dust collector (181) is equipped with a first collection tank (185) at its discharge port.

7. The magnetic separation equipment for dry extraction of magnetic impurities from powder materials according to any one of claims 3-5, characterized in that, The magnetic separation equipment for dry extraction of magnetic impurities from powder materials also includes a second dust collector (191) and a second fan (192). The second dust collector (191) is connected to the discharge port (143) through a third pipe (193), and the third pipe (193) is provided with a third control valve (194) for controlling the opening and closing of the third pipe (193). The second fan (192) is connected to the second dust collector (191); The second dust collector (191) is equipped with a second collection tank (195) at its discharge port.

8. The magnetic separation equipment for dry extraction of magnetic impurities from powder materials according to any one of claims 3-5, characterized in that, The first pipe (144) is connected to a fourth pipe (155) at the part of the first control valve (145) near the magnetic separator (110). The fourth pipe (155) is used to connect to the gas supply equipment. The fourth pipe (155) is equipped with a fourth control valve (156).

9. The magnetic separation equipment for dry extraction of magnetic impurities from powder materials according to any one of claims 1-5, characterized in that, The first ventilation cap (120) is connected to a fifth pipe (121) that communicates with the gas supply equipment, and the fifth pipe (121) is equipped with a fifth control valve (122).

10. The magnetic separation equipment for dry extraction of magnetic impurities from powder materials according to any one of claims 1-5, characterized in that, The magnetic separator (110) is spherical, the second vent pipe (114) is arranged radially along the magnetic separator (110), and the second vent pipe (114) is arranged near the bottom of the magnetic separator (110), while the first vent pipe (113) is arranged near the middle of the magnetic separator (110).

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