Lithium hydroxide crushing production unit

Abstract

The utility model relates to the technical field of lithium hydroxide production equipment, and provides a lithium hydroxide crushing production unit which comprises a crushing device for crushing, grinding and screening lithium hydroxide, and a re-feeding device and a conveying device which are arranged at the downstream of the crushing device, wherein the crushing device comprises a crushing mechanism, a grinding mechanism and a screening mechanism which are arranged up and down, the grinding mechanism is connected with the crushing mechanism to coaxially rotate with the crushing mechanism, and the screening mechanism and the grinding mechanism synchronously and reversely rotate. Through the crushing mechanism, the grinding mechanism and the screening mechanism which are arranged up and down on the crushing device, lithium hydroxide particles are refined and screened twice in a manner of crushing, grinding in the same direction and then screening in the reverse direction, and then cyclic crushing is realized through the re-feeding device, so that the uniformity of the granularity of the lithium hydroxide particles conveyed by the conveying device is ensured; the production efficiency is improved; in addition, a production unit composed of the smashing device, the re-feeding device and the material conveying device is compact in structure, and the production cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium hydroxide production equipment, in particular to a lithium hydroxide crushing production unit. Background Art

[0002] Lithium hydroxide is a white, fine monoclinic crystal with a spicy taste and strong alkalinity. It can be used as an additive for alkaline battery electrolytes, increasing battery capacity by 12% to 15% and extending battery life by 2 to 3 times.

[0003] Lithium hydroxide easily absorbs carbon dioxide and moisture in the air to form clots. Therefore, when used, the water-containing lithium hydroxide particles need to be dried and crushed in order to facilitate more efficient utilization of the material during the production and processing process.

[0004] At present, the existing technology for lithium hydroxide crushing mostly uses compressed air or nitrogen as power to perform air flow crushing. Air flow crushing involves a large number of related equipment and pipelines, with high investment costs. The dispersed layout leads to large space occupation, and the production energy consumption is greatly increased during the processing process. The output crushed particles are of different sizes, which reduces production efficiency. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a lithium hydroxide crushing production unit to solve the problems in the existing technology of using air flow to crush lithium hydroxide, which involves a large number of related equipment and pipelines, high investment costs, and a large space occupation due to a dispersed layout. In addition, the production energy consumption is greatly increased during the processing process, and the output crushed particles are of different sizes, which reduces production efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A lithium hydroxide crushing production unit, comprising:

[0008] A comminution device for crushing, grinding and screening lithium hydroxide;

[0009] a re-feeding device, disposed downstream of the pulverizing device, for conveying un-pulverized lithium hydroxide to be re-fed into the pulverizing device for pulverization processing; and

[0010] A feeding device is provided downstream of the pulverizing device, and is used to transport the pulverized lithium hydroxide to the next process for use;

[0011] The crushing device includes:

[0012] upper shell;

[0013] A lower shell is provided directly below the upper shell;

[0014] A crushing mechanism, rotatably disposed in the upper portion of the upper shell, for crushing lithium hydroxide;

[0015] a grinding mechanism, disposed in the lower portion of the upper housing and connected to the crushing mechanism to rotate coaxially therewith, for grinding lithium hydroxide; and

[0016] The screening mechanism is arranged inside the lower shell and rotates synchronously and in the opposite direction with the grinding mechanism, and is used for screening lithium hydroxide.

[0017] Optionally, the upper shell is divided into a straight cylinder section, a first conical cylinder section and a second conical cylinder section in sequence from top to bottom, and the small end of the first conical cylinder section is butted against the small end of the second conical cylinder section;

[0018] The lower shell is a conical cylinder structure with the large end facing upwards. The conical cylinder is fixedly supported on the ground by four legs, and its upper edge is folded outwards to form an annular platform. The annular platform supports the upper shell by four pillars with diagonal braces.

[0019] The crushing mechanism includes a first motor, a central shaft, and a crushing knife. The first motor is fixedly mounted on the middle portion of the top cover of the straight tube section. The upper end of the central shaft is fixedly connected to the first output shaft of the first motor extending into the interior of the straight tube section. The crushing knife is connected to the central shaft via a flat key.

[0020] The grinding mechanism includes a grinding cone connected to the lower end of the central shaft, and a grinding channel is provided between the grinding cone and the second cone section;

[0021] The screening mechanism includes a screening bucket rotatably supported on the annular platform through a bearing, and the lower edge of the second conical cylinder section extends into the screening bucket so that the screening bucket surrounds the outlet of the grinding channel;

[0022] The outer side of the upper edge of the screen bucket is connected to a gear ring, the gear ring is engaged with a gear, and the gear is fixedly connected to a transmission shaft, the lower end of the transmission shaft is rotatably connected to the annular platform, and the upper end is connected to the second output shaft of the first motor through a belt drive;

[0023] The lower edge of the screen bucket is connected to a first discharge pipe, which is rotatably arranged on a second discharge pipe. The second discharge pipe seals and penetrates the discharge pipe arranged at the bottom of the lower shell to discharge the uncrushed lithium hydroxide to the re-feeding device. The discharge pipe is bent 90° to discharge the crushed lithium hydroxide to the feeding device.

[0024] Optionally, the crushing knives are arranged in multiple groups up and down, and each group of the crushing knives has multiple twisted blades evenly distributed around the circumference of the central axis, and each twisted blade twists from inside to outside to form a structure similar to fan blades;

[0025] The length of the twisted blades of each group of crushing knives decreases from top to bottom, and the twisted blades of two adjacent groups of crushing knives are staggered.

[0026] Optionally, the crushing knives are arranged in three groups up and down;

[0027] Each group of crushing knives has four twisted blades evenly distributed around the circumference of the central axis;

[0028] The twisted blades of two adjacent groups of crushing knives are staggered 45 degrees from each other.

[0029] Optionally, the grinding cone is a hollow truncated cone structure, and its top edge is rounded to facilitate material flow;

[0030] A grinding channel with an inverted eight-shaped structure in longitudinal section is formed between the outer conical surface of the grinding cone and the inner conical surface of the second cone cylinder segment.

[0031] Optionally, the grinding channel has a large inlet gap and a small outlet gap.

[0032] Optionally, the outer conical surface of the grinding cone is provided with a plurality of evenly distributed grinding bars along the generatrix direction thereof, for squeezing and crushing lithium hydroxide.

[0033] Optionally, the grinding bars have two specifications, one long and one short, which are spaced apart from each other and the long one is thinner and the short one is thicker.

[0034] Optionally, the re-feeding device includes a screw conveyor and a bucket elevator;

[0035] The screw conveyor is fixedly installed on the ground, with its inlet connected to the lower end of the second discharge pipe, and its outlet connected to the inlet of the bucket elevator through the first inclined pipe;

[0036] The bucket elevator outlet is communicated with the return port opened on the top cover through a second inclined pipe.

[0037] Optionally, the feeding device includes an induced draft fan fixedly mounted on the ground;

[0038] The induced draft fan inlet is communicated with an end of the discharge pipe away from the lower shell, and the outlet extends to the next process.

[0039] Compared with the prior art, the beneficial effects of the present invention are:

[0040] 1. Through the crushing mechanism, grinding mechanism and screening mechanism arranged above and below the crushing device, the lithium hydroxide particles are refined and screened twice in the manner of "first crushing, then grinding in the same direction, and then screening in the reverse direction". After that, the recycling crushing is achieved through the re-feeding device, which ensures the uniformity of the particle size of the lithium hydroxide particles transported by the feeding device and improves the production efficiency. In addition, the production unit composed of the crushing device, the re-feeding device and the feeding device has a compact structure, which greatly reduces the production cost.

[0041] 2. Through the staggered setting, the twisting blades of the next group of crushing knives can fill the vacancies of the twisting blades of the previous group of crushing knives and are located below the twisting blades of the previous group of crushing knives with a certain height difference. The twisting blades of the next group of crushing knives can collide with the clots in the lithium hydroxide particles again and crush them for the second time, thereby improving the crushing effect of the initial refinement of the lithium hydroxide particles.

[0042] 3. Two grinding bars of different specifications can produce different degrees of periodic squeezing on the lithium hydroxide entering the grinding channel, thereby improving the grinding effect of lithium hydroxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] Figure 1 It is a structural diagram of the utility model;

[0045] Figure 2 Schematic diagram of the structure of the grinding cone;

[0046] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of the middle part A;

[0047] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of part B in the middle. DETAILED DESCRIPTION

[0048] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0051] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0052] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0053] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0054] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0055] Referring to Figures 1-4 The utility model provides a lithium hydroxide crushing production unit, including:

[0056] Crushing device for crushing, grinding and screening lithium hydroxide;

[0057] Re -throw device, be located downstream of crushing device, for conveying the lithium hydroxide that is not crushed to be thrown into crushing device again to carry out crushing processing;And

[0058] Conveying device, be located downstream of crushing device, for conveying the lithium hydroxide that is crushed to next process to be used;

[0059] Wherein, crushing device includes:

[0060] Upper shell 100;

[0061] Lower shell 200, be located directly below upper shell 100;

[0062] Crushing mechanism 300, rotation is located in the upper part in upper shell 100, for crushing lithium hydroxide;

[0063] Grinding mechanism 400, be located in the lower part in upper shell 100 and be connected with crushing mechanism 300 to rotate coaxially with it, for grinding lithium hydroxide;And

[0064] Screening mechanism 500, be located inside lower shell 200 and rotate synchronously and reversely with grinding mechanism 400, for screening lithium hydroxide.

[0065] Specifically, upper shell 100 is sequentially divided into straight cylinder section 110, first tapered cylinder section 120 and second tapered cylinder section 130 from top to bottom, and the small end of first tapered cylinder section 120 is butt jointed with the small end of second tapered cylinder section 130;Lower shell 200 is in the form of a tapered cylinder with the large end upward, and the tapered cylinder is fixedly supported on the ground by four supporting legs 210, and an annular platform 220 is formed on the tapered cylinder by folding outward, and the annular platform 220 supports upper shell 100 by four supporting columns 230 with inclined braces 231;Crushing mechanism 300 includes a first motor 310, a central shaft 320 and a crushing knife 330, the first motor 310 is fixedly installed in the middle of the top cover 111 of straight cylinder section 110, the upper end of the central shaft 320 is fixedly connected with the first output shaft of the first motor 310 extending into the interior of straight cylinder section 110, and the crushing knife 330 is connected with the central shaft 320 by means of a flat key;Grinding mechanism 400 includes a grinding cone 410 connected with the lower end of the central shaft 320, and a grinding passage is arranged between the grinding cone 410 and the second tapered cylinder section 130;Screening mechanism 500 includes a screen 510 rotatably supported on the annular platform 220, and the second tapered cylinder section 130 extends into the screen 510 to enclose the outlet of the grinding passage;A gear ring 520 is connected to the upper side of the screen 510, and a gear 530 is engaged with the gear ring 520 (for details, see the drawings)Figure 3 As shown, the gear 530 is fixedly connected to a transmission shaft 540, the lower end of the transmission shaft 540 is rotatably connected to the annular platform 220, and the upper end is connected to the second output shaft of the first motor 310 through a belt drive; the lower edge of the sieve bucket 510 is connected to a first discharge pipe 550, which is rotatably arranged on the second discharge pipe 560 (see Figure 4 As shown), the second discharge pipe 560 seals and penetrates the discharge pipe 240 provided at the bottom of the lower shell 200 to discharge the uncrushed lithium hydroxide to the re-feeding device, and the discharge pipe 240 bends 90° to discharge the crushed lithium hydroxide to the feeding device.

[0066] During operation, the first motor 310 is started, and the crushing blade 330 and the grinding cone 410 are rotated coaxially via the first output shaft through the central shaft 320, and the transmission shaft 540 is rotated via the second output shaft through the belt drive, and the gear 530 rotates synchronously with the transmission shaft 540 to make the gear ring 520 rotate in the opposite direction, and the gear ring 520 drives the screen bucket 510 to rotate; the lithium hydroxide to be crushed is poured into the straight cylinder section 110 from the feeding port 112 on the top cover 111 of the straight cylinder section 110, and the lithium hydroxide first collides with the rotating crushing blade 330, thereby The block is crushed to obtain preliminary refinement, and then enters the grinding channel to rub against the grinding cone 410 to be ground and refined again, and then falls on the counter-rotating screen hopper 510 for screening. The lithium hydroxide that has been crushed to a particle size that meets the requirements falls into the lower shell 200 through the screen hopper 510, and is discharged to the feeding device through the discharge pipe 240 and transported to the next process for use. The uncrushed lithium hydroxide flows downward along the inclined inner wall of the screen hopper 510 into the first discharge pipe 550, and is discharged to the re-feeding device through the second discharge pipe 560 and is again fed into the crushing device for crushing. In other words, through the crushing mechanism 300, grinding mechanism 400 and screening mechanism 500 arranged above and below the crushing device, the lithium hydroxide particles are refined and screened twice in the manner of "first crushing, then grinding in the same direction, and then screening in the opposite direction". After that, the re-feeding device is used to realize circular crushing, ensuring the uniformity of the particle size of the lithium hydroxide particles transported by the feeding device and improving production efficiency. In addition, the production unit composed of the crushing device, re-feeding device and feeding device has a compact structure, which greatly reduces production costs.

[0067] See also Figure 1As shown, multiple groups of crushing blades 330 are arranged vertically. Each group of crushing blades 330 has multiple twisting blades evenly distributed around the central axis 320. Each twisting blade twists from the inside outward, forming a structure similar to fan blades. The twisting blades of each group of crushing blades 330 decrease in length from top to bottom, and the twisting blades of two adjacent groups of crushing blades 330 are staggered. This staggered arrangement allows the twisting blades of the next group of crushing blades 330 to fill the gap left by the twisting blades of the previous group of crushing blades 330, and to be positioned below the twisting blades of the previous group of crushing blades 330 with a certain height difference. The twisting blades of the next group of crushing blades 330 can collide with the clots in the lithium hydroxide particles again, causing them to break up again, thereby improving the initial refinement of the lithium hydroxide particles.

[0068] In this embodiment, three groups of crushing knives 330 are arranged above and below. Each group of crushing knives 330 has four twisted blades evenly distributed around the central axis 320. The twisted blades of two adjacent groups of crushing knives 330 are staggered by 45 degrees.

[0069] See also Figure 2 As shown, the grinding cone 410 has a hollow frustum structure with rounded corners on the top edge to facilitate material flow (rather than aggregation); between the outer conical surface of the grinding cone 410 and the inner conical surface of the second cone section 130 is a grinding channel with an inverted eight-shaped structure in longitudinal section.

[0070] To facilitate the entry of preliminarily refined lithium hydroxide particles into the grinding channel, the gap at the inlet (i.e., the upper side) of the grinding channel is large, while the gap at the outlet (i.e., the lower side) is small. Specifically, the taper of the second conical cylinder section 130 is smaller than that of the grinding cone 410. For example, the cone apex angle of the second conical cylinder section 130 is 90°, while the cone apex angle of the grinding cone 410 is 92°.

[0071] The outer conical surface of the grinding cone 410 is provided with a plurality of evenly distributed grinding bars 411 along the generatrix direction thereof, for squeezing and crushing lithium hydroxide.

[0072] The grinding bars 411 are provided in two sizes, one long and one short, spaced apart from each other, with the long one being thinner and the short one being thicker. Thus, the two different sizes of grinding bars 411 can produce varying degrees of periodic compression on the lithium hydroxide entering the grinding channel, thereby improving the grinding effect of the lithium hydroxide.

[0073] See also Figure 1As shown, the re-feeding device includes a screw conveyor 610 and a bucket elevator 620; the screw conveyor 610 is fixedly installed on the ground, its inlet is connected to the lower end of the second discharge pipe 560, and its outlet is connected to the inlet of the bucket elevator 620 through the first inclined pipe 630; the outlet of the bucket elevator 620 is connected to the return port 113 provided on the top cover 111 through the second inclined pipe 640. Specifically, the bucket elevator 620 includes a housing 621 and a second motor 622. The lower part of the housing 621 is fixedly installed in a pit reserved on the ground. The second motor 622 is installed on the upper part of the housing 621 and can drive a plurality of hoppers to circulate through a traction chain installed inside the housing 621, thereby transporting the incoming material horizontally from the screw conveyor 610 to the first inclined pipe 630, and then lifting it to the second inclined pipe 640 for discharge.

[0074] See also Figure 1 As shown, the conveying device includes an induced draft fan 650 fixed to the ground. The inlet of induced draft fan 650 is connected to the end of discharge pipe 240 away from lower housing 200, and the outlet extends to the next process. When induced draft fan 650 is activated, it uses negative pressure suction to suck the lithium hydroxide, which has been crushed to the required particle size, from discharge pipe 240 to the next process.

[0075] The above embodiments are only preferred embodiments of the present invention and are not limitations on the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A lithium hydroxide crushing production unit, characterized in that: include: A comminution device for crushing, grinding and screening lithium hydroxide; a re-feeding device, disposed downstream of the pulverizing device, for conveying un-pulverized lithium hydroxide to be re-fed into the pulverizing device for pulverization processing; and A feeding device is provided downstream of the pulverizing device, and is used to transport the pulverized lithium hydroxide to the next process for use; The crushing device includes: upper shell; A lower shell is provided directly below the upper shell; A crushing mechanism, rotatably disposed in the upper portion of the upper shell, for crushing lithium hydroxide; a grinding mechanism, disposed in the lower portion of the upper housing and connected to the crushing mechanism to rotate coaxially therewith, for grinding lithium hydroxide; and The screening mechanism is arranged inside the lower shell and rotates synchronously and in the opposite direction with the grinding mechanism, and is used for screening lithium hydroxide.

2. The lithium hydroxide pulverization production unit according to claim 1, characterized in that: The upper shell is divided into a straight cylinder section, a first conical cylinder section and a second conical cylinder section in sequence from top to bottom, and the small end of the first conical cylinder section is butted against the small end of the second conical cylinder section; The lower shell is a conical cylinder structure with the large end facing upwards. The conical cylinder is fixedly supported on the ground by four legs, and its upper edge is folded outwards to form an annular platform. The annular platform supports the upper shell by four pillars with diagonal braces. The crushing mechanism includes a first motor, a central shaft, and a crushing knife. The first motor is fixedly mounted on the middle portion of the top cover of the straight tube section. The upper end of the central shaft is fixedly connected to the first output shaft of the first motor extending into the interior of the straight tube section. The crushing knife is connected to the central shaft via a flat key. The grinding mechanism includes a grinding cone connected to the lower end of the central shaft, and a grinding channel is provided between the grinding cone and the second cone section; The screening mechanism includes a screening bucket rotatably supported on the annular platform through a bearing, and the lower edge of the second conical cylinder section extends into the screening bucket so that the screening bucket surrounds the outlet of the grinding channel; The outer side of the upper edge of the screen bucket is connected to a gear ring, the gear ring is engaged with a gear, and the gear is fixedly connected to a transmission shaft, the lower end of the transmission shaft is rotatably connected to the annular platform, and the upper end is connected to the second output shaft of the first motor through a belt drive; The lower edge of the screen bucket is connected to a first discharge pipe, which is rotatably arranged on a second discharge pipe. The second discharge pipe seals and penetrates the discharge pipe arranged at the bottom of the lower shell to discharge the uncrushed lithium hydroxide to the re-feeding device. The discharge pipe is bent 90° to discharge the crushed lithium hydroxide to the feeding device.

3. The lithium hydroxide pulverization production unit according to claim 2, characterized in that: The crushing knives are arranged in multiple groups up and down, and each group of the crushing knives has multiple twisting blades evenly distributed around the circumference of the central axis, and each twisting blade twists from the inside to the outside to form a structure similar to fan blades; The length of the twisted blades of each group of crushing knives decreases from top to bottom, and the twisted blades of two adjacent groups of crushing knives are staggered.

4. The lithium hydroxide pulverization production unit according to claim 3, characterized in that: The crushing knives are arranged in three groups up and down; Each group of crushing knives has four twisted blades evenly distributed around the circumference of the central axis; The twisted blades of two adjacent groups of crushing knives are staggered 45 degrees from each other.

5. The lithium hydroxide pulverization production unit according to any one of claims 2 to 4, characterized in that: The grinding cone is a hollow truncated cone structure with rounded corners on the top edge to facilitate material flow. A grinding channel with an inverted eight-shaped structure in longitudinal section is formed between the outer conical surface of the grinding cone and the inner conical surface of the second cone cylinder segment.

6. The lithium hydroxide pulverization production unit according to claim 5, characterized in that: The grinding channel has a large inlet gap and a small outlet gap.

7. The lithium hydroxide pulverization production unit according to claim 5, characterized in that: The outer conical surface of the grinding cone is provided with a plurality of evenly distributed grinding bars along the generatrix direction thereof, which are used for squeezing and crushing lithium hydroxide.

8. The lithium hydroxide pulverization production unit according to claim 7, characterized in that: The grinding bars have two specifications, one long and one short. They are spaced apart from each other, with the long one being thinner and the short one being thicker.

9. The lithium hydroxide pulverization production unit according to any one of claims 2 to 4 and 6 to 8, characterized in that: The re-feeding device includes a screw conveyor and a bucket elevator; The screw conveyor is fixedly installed on the ground, with its inlet connected to the lower end of the second discharge pipe, and its outlet connected to the inlet of the bucket elevator through the first inclined pipe; The bucket elevator outlet is communicated with the return port opened on the top cover through a second inclined pipe.

10. The lithium hydroxide pulverization production unit according to claim 9, characterized in that: The feeding device includes an induced draft fan fixedly installed on the ground; The induced draft fan inlet is communicated with an end of the discharge pipe away from the lower shell, and the outlet extends to the next process.

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