Raw material impurity removal treatment device for producing cobalt-impregnated magnesium oxide

Abstract

The present application relates to the field of magnesium oxide purification, in particular to a raw material impurity removal treatment device based on cobalt deposition grade magnesium oxide production, comprising a bearing rack, a first-stage impurity removal module and a second-stage impurity removal module are sequentially assembled inside the bearing rack along the material conveying direction, and a guide inclined plate is hingedly arranged between the first-stage impurity removal module and the second-stage impurity removal module, the present application forms a multi-stage continuous impurity removal structure by setting the first-stage impurity removal module, the second-stage impurity removal module and the air pressure feeding assembly, the flotation impurity removal effect is strengthened by reciprocating swinging of the cleaning frame, the surface floating impurities of the raw material are effectively separated, the meshing transmission cooperates with the corrugated guide rod structure, the material is hot-pressed, extruded, softened and peeled off from the fine inclusions and organic attachments, the scraper is arranged to prevent material adhesion, the air pressure feeding is cooperated to realize closed material transfer, the magnetic attraction sieve disc is used to complete iron removal and particle size screening, and the high-purity production requirements of the cobalt deposition grade magnesium oxide are met.

Description

Technical Field

[0001] This invention relates to the field of magnesium oxide purification, specifically to a raw material impurity removal device based on cobalt-precipitated magnesium oxide production. Background Technology

[0002] In the hydrometallurgical cobalt precipitation process, magnesium oxide is a key precipitation aid. The purity and activity of magnesium oxide directly determine the grade of cobalt salt products, cobalt recovery rate, and production unit consumption. Therefore, there are strict requirements for the purity of magnesium oxide raw materials, and it is necessary to strictly control organic impurities, fine inclusions, ferromagnetic impurities, and coarse agglomerates in the raw materials.

[0003] Currently, conventional magnesium oxide raw materials on the market contain mineral impurities and attached organic pollutants. If the impurities are not thoroughly removed, it is very easy to cause a decrease in the reactivity of the cobalt precipitation process and a high residual amount of magnesium, which will significantly reduce the grade of the finished cobalt hydroxide product. However, current traditional magnesium oxide impurity removal processes mostly employ a single static immersion screening method. This results in insufficient contact between the material and flotation reagents, poor removal of surface and embedded fine impurities, and a lack of graded impurity removal structures. Consequently, it is impossible to specifically remove different types of impurities, leading to common defects such as easy material adhesion, easy introduction of external contaminants during transportation, and insufficient iron impurity screening and removal capacity. Furthermore, the equipment linkage during the processing stage is poor, and the material dumping and transportation process is cumbersome, making it difficult to achieve continuous and closed impurity removal processing. This fails to meet the requirements for large-scale industrial production and purification of high-end cobalt-precipitated magnesium oxide.

[0004] To address this technical deficiency, a solution is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a raw material impurity removal device based on cobalt-grade magnesium oxide production, so as to solve the above-mentioned technical defects.

[0006] The objective of this invention can be achieved through the following technical solution: a raw material impurity removal device based on cobalt-grade magnesium oxide production, including a support frame, wherein a primary impurity removal module and a secondary impurity removal module are sequentially assembled inside the support frame along the material conveying direction, and a guide plate is hinged between the primary impurity removal module and the secondary impurity removal module; and a pneumatic feeding component is provided on the top inner wall of the support frame and at the upper end of the corresponding secondary impurity removal module. The primary impurity removal module includes a purification chamber and a settling chamber. The purification chamber is fixedly installed in the end area of ​​the inner wall of the bottom of the support frame, and the settling chamber is movably positioned directly above the purification chamber. A lifting cylinder is provided between the top of the settling chamber and the top of the inner wall of the support frame. A drive motor is provided on the inner wall of the top of the settling chamber, and a longitudinal lead screw is fixedly installed at the bottom output shaft of the drive motor. The bottom of the longitudinal lead screw is movably connected to an inverted concave lifting frame, and a cleaning frame is hinged to the middle section of the inverted concave lifting frame.

[0007] Furthermore, the length of the cleaning frame is less than the inner diameter of the purification chamber, and an L-shaped sliding groove is provided on the top of the cleaning frame. An L-shaped push-pull frame is slidably fitted on the top of the L-shaped sliding groove. Strip-shaped sliding grooves are provided on the front and rear sides of the bottom of the L-shaped push-pull frame. A sliding shaft is fixedly installed on the front and rear frame edges of the top of the cleaning frame. The sliding shaft is adapted to slide inside the long groove, and a matching reset spring assembly is provided between the inner walls of the long groove. The bottom end of one side of the L-shaped push-pull frame is provided with a beveled surface.

[0008] Furthermore, inside the settling chamber, a turntable is spirally connected to the outside of the longitudinal screw, and the outer diameter of the turntable is adapted to the inside of the settling chamber. A slider is arranged on the outer wall of the turntable and is adapted to slide inside the vertical groove set on the inner wall of the settling chamber. One end of the bottom of the turntable is hinged to a guide rod on one side of the front end of the cleaning frame.

[0009] Furthermore, inside the settling chamber, a turntable is spirally connected to the outside of the longitudinal screw, and the outer diameter of the turntable is adapted to the inside of the settling chamber. A slider is arranged on the outer wall of the turntable and is adapted to slide inside the vertical groove set on the inner wall of the settling chamber. One end of the bottom of the turntable is hinged to a guide rod on one side of the front end of the cleaning frame.

[0010] Furthermore, hollow rotary cylinders are movably installed at the front and rear ends of the bottom cylinder base, and the bottom of the hollow rotary cylinder is rotatably connected to the inner wall of the bearing frame. An auxiliary rotating gear is fixedly sleeved at the outer side of the hollow rotary cylinder, which is flush with the rack of the concave bearing plate, and the auxiliary rotating gear and the rack at the corresponding position of the concave bearing plate mesh with each other for transmission.

[0011] Furthermore, a vertical guide rod is longitudinally installed inside the hollow rotary cylinder, and a damping spring ring is provided between the bottom of the vertical guide rod and the corresponding inner wall of the hollow rotary cylinder. A continuous corrugated groove is opened on the outer wall of the vertical guide rod, and a bearing pin is provided on one side of the inner wall of the hollow rotary cylinder. The bearing pin is adapted to fit into the corrugated groove.

[0012] Furthermore, a horizontally arranged pull rod is fixedly installed on one side of the vertical guide rod, and the outer end of the pull rod extends into the concave carrier plate. One set of the pull rods has a heat-conducting pressure plate installed on the end away from the vertical guide rod through the upright, and two sets of tapered extrusion strips that are wider at the top and narrower at the bottom are installed on the bottom of the heat-conducting pressure plate. The bottom of the other set of the pull rods is hinged to an inclined material scraper through the upright.

[0013] Furthermore, the pneumatic feeding assembly includes a double-headed air pump located on the inner wall of the top of the support frame and above the concave carrier plate. The two airflow ports of the double-headed air pump are respectively connected to the inlet bend and the exhaust bend. A magnetic sieve plate is fixedly installed at the bottom of the inlet bend. The surface of the magnetic sieve plate is arranged with a mesh screening structure, and the magnetic sieve plate is arranged in relation to the vertically corresponding concave carrier plate. The bottom of the exhaust bend is directly opposite the material storage cylinder.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention employs a two-stage processing structure consisting of a first-stage flotation oscillation impurity removal and a second-stage hot-pressing extrusion for deep impurity removal. The first stage uses flotation liquid to separate impurities on the surface of the raw material by floating them with bubbles. The second stage uses hot-pressing to soften and extrude the fine impurities and organic deposits on the surface of the raw material, removing different types of impurities in layers. This significantly improves the purification accuracy of magnesium oxide raw materials and can stably meet the purity production standards for cobalt-grade products. Specifically, the first-stage flotation relies on the linkage of the lead screw, turntable and guide rod to drive the washing frame to swing and tilt back and forth, so that the raw material and flotation liquid can fully and evenly contact each other. Compared with static soaking and washing, the material contact reaction is more complete and the impurity removal speed is faster. It is equipped with an L-shaped push-pull frame that can open and close automatically. It automatically seals the material to prevent the material from spilling when settling and soaking, and automatically opens when lifting and unloading. The secondary impurity removal module relies on gear meshing transmission to achieve rotational drive, and in conjunction with the corrugated rotary groove structure, it drives the components to lift periodically. It integrates hot pressing impurity removal and material anti-sticking and scraping functions, and simultaneously completes impurity stripping and material orderly transfer, avoiding material adhesion and accumulation, and ensuring the continuous and smooth progress of the impurity removal process. In addition, a pneumatic feeding component is added to complete the material transfer in a closed airflow conveying method with negative pressure suction and positive pressure feeding, which isolates the material from external dust and debris pollution throughout the process; when paired with a magnetic sieve plate, it can simultaneously adsorb ferromagnetic impurities and screen the material particle size, remove coarse particle agglomerates, and further optimize the quality of raw materials. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural schematic diagram of the primary impurity removal module of the present invention; Figure 3 This is a planar sectional view of the overall structure of the present invention; Figure 4 This is a partial structural diagram of the secondary impurity removal module of the present invention; Figure 5 This is a cross-sectional view of the combination of the support frame and the secondary cleaning module of the present invention.

[0017] In the diagram: 1. Support frame; 2. Primary impurity removal module; 3. Secondary impurity removal module; 4. Guide plate; 5. Pneumatic feeding assembly; 21. Purification chamber; 22. Settling chamber; 23. Lifting cylinder; 24. Drive motor one; 25. Longitudinal lead screw; 26. Inverted concave lifting frame; 27. Cleaning frame; 28. L-shaped push-pull frame; 29. ​​Turntable; 210. Guide rod; 31. Bottom cylinder seat; 32. Drive motor two; 33. Concave carrier plate; 34. Hollow rotary cylinder; 35. Auxiliary rotating gear plate; 36. Vertical guide rod; 37. Damping spring ring; 38. Pull rod; 39. Heat-conducting pressure plate; 310. Conical extrusion strip; 311. Material scraper; 51. Double-headed air pump; 52. Magnetic sieve plate; 53. Material storage cylinder. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1-3 As shown, the raw material impurity removal device based on cobalt-grade magnesium oxide production includes a support frame 1. Inside the support frame 1, a primary impurity removal module 2 and a secondary impurity removal module 3 are sequentially assembled along the material conveying direction. A guide plate 4 is hinged between the primary impurity removal module 2 and the secondary impurity removal module 3. A pneumatic feeding component 5 is provided on the top inner wall of the support frame 1 and at the upper end of the corresponding secondary impurity removal module 3. The primary impurity removal module 2 includes a purification chamber 21 and a settling chamber 22. The purification chamber 21 is fixedly installed in the end area of ​​the bottom inner wall of the support frame 1, and the settling chamber 22 is movably positioned directly above the purification chamber 21. A lifting cylinder 23 is provided between the top of the settling chamber 22 and the top of the inner wall of the support frame 1. A drive motor 24 is provided on the inner wall of the top of the settling chamber 22, and a longitudinal lead screw 25 is fixedly installed at the bottom output shaft of the drive motor 24. The bottom of the longitudinal lead screw 25 is movably connected to an inverted concave lifting frame 26, and a cleaning frame 27 is hinged to the middle section of the frame of the inverted concave lifting frame 26. The length of the cleaning frame 27 is less than the inner diameter of the purification chamber 21, and the top of the cleaning frame 27 is provided with an L-shaped sliding groove. The outer wall of the cleaning frame 27 is made of hollow mesh. An L-shaped push-pull frame 28 is slidably fitted on the top of the L-shaped sliding groove. The bottom front and rear sides of the L-shaped push-pull frame 28 are provided with strip-shaped sliding grooves. A sliding shaft is fixedly installed on the front and rear frame edges of the top of the cleaning frame 27. The sliding shaft is adapted to slide inside the long groove, and a matching reset spring assembly is provided between the inner walls of the long groove. The bottom end of one side of the L-shaped push-pull frame 28 is provided with a beveled surface. Inside the settling chamber 22, a turntable 29 is screwed and connected to the outside of the longitudinal screw 25. The outer diameter of the turntable 29 is adapted to the inside of the settling chamber 22. A slider is arranged on the outer wall of the turntable 29 and is adapted to slide inside the vertical groove set on the inner wall of the settling chamber 22. One end of the bottom of the turntable 29 is hinged to the front end of the cleaning frame 27 with a guide rod 210.

[0020] In the specific operation, a quantitative flotation reagent and water are first injected into the purification chamber 21. The two are mixed to generate a flotation liquid system. In the initial state, the L-shaped push-pull frame 28 and the cleaning frame 27 are staggered vertically, and the top frame opening of the cleaning frame 27 has a half-opening. Then, the magnesium oxide raw material to be treated is put into the cleaning frame 27. Next, the lifting cylinder 23 is started, which drives the settling chamber 22 and its internal components to settle synchronously. The cleaning frame 27 is inserted into the purification chamber 21, and the inclined surface of the L-shaped push-pull frame 28 presses against the inner side of the cleaning frame 27, forcing the L-shaped push-pull frame 28 to slide inward along the L-shaped sliding groove, completely sealing the top opening of the cleaning frame 27 to prevent the material from overflowing during the settling process. At the same time, drive motor 24 starts, driving the longitudinal lead screw 25 to rotate. Utilizing the spiral structure, it drives the turntable 29 and guide rod 210 to sink and press against one end of the cleaning frame 27 (away from the L-shaped push-pull frame 28) to sink downwards. The raw material tilts towards the sinking end. Then, drive motor 24 drives the longitudinal lead screw 25 to rotate in the opposite direction, realizing the reset and lifting of the guide rod 210, and the cleaning frame 27 tends to be straight. This process is repeated to achieve the swing cleaning of the cleaning frame 27, further enhancing the cleaning effect on the magnesium oxide raw material. At this point, the raw material particles are in full contact with the flotation solution, impurities adhere to the bubbles and float to the surface of the liquid, and are discharged through the mesh of the cleaning frame 27. In addition, after cleaning, the lifting cylinder 23 pulls the cleaning frame 27 to rise until it is removed from the interior of the purification chamber 21, and the L-shaped push-pull frame 28 is reset under the push of the reset spring assembly and is vertically misaligned with the cleaning frame 27. At this time, the L-shaped push-pull frame 28 opens until the cleaning frame 27 passes the guide inclined plate 4 and is located at its upper end. Then, the drive motor 24 is started again to drive the longitudinal screw 25 to rotate. Using the spiral structure, the turntable 29 and the guide rod 210 are driven to sink and pull one end of the cleaning frame 27 (away from the L-shaped push-pull frame 28) to lift downward. The open end of the cleaning frame 27 sinks and the cleaning frame 27 is tilted so that the raw materials inside are poured into the guide inclined plate 4. The material slides down the guide inclined plate 4 to the secondary impurity removal module 3 and enters the next processing stage.

[0021] Example 2: Please refer to Figures 3-5As shown, the secondary impurity removal module 3 includes a bottom cylinder seat 31 fixedly installed in the center of the bottom inner wall of the support frame 1. A second drive motor 32 is embedded inside the bottom cylinder seat 31, and a concave carrier plate 33 is coaxially fixedly installed at the top output shaft of the second drive motor 32. The low-position discharge end of the guide plate 4 extends into the inner cavity of the concave carrier plate 33. Several sets of racks are arranged circumferentially on the outer wall of the bottom of the concave carrier plate 33. Hollow rotary cylinders 34 are movably installed at the front and rear ends of the bottom cylinder base 31, and the bottom of the hollow rotary cylinder 34 is rotatably connected to the inner wall of the bearing frame 1. An auxiliary rotating gear 35 is fixedly sleeved at the outer part of the hollow rotary cylinder 34 and the rack of the concave carrier plate 33, and the auxiliary rotating gear 35 and the rack at the corresponding position of the concave carrier plate 33 mesh with each other for transmission. A vertical guide rod 36 is installed longitudinally inside the hollow rotary cylinder 34, and a damping spring ring 37 is provided between the bottom of the vertical guide rod 36 and the corresponding inner wall of the hollow rotary cylinder 34. A continuous corrugated groove is opened on the outer wall of the vertical guide rod 36, and a bearing pin is provided on one side of the inner wall of the hollow rotary cylinder 34. The bearing pin is adapted to fit into the corrugated groove. A horizontally arranged pull rod 38 is fixedly installed on one side of the vertical guide rod 36. The outer end of the pull rod 38 extends into the concave carrier plate 33. One set of pull rods 38 has a heat-conducting pressure plate 39 installed on the end away from the vertical guide rod 36 through the upright. Two sets of tapered extrusion strips 310 with a wider top and a narrower bottom are installed at the bottom of the heat-conducting pressure plate 39. The bottom of the other set of pull rods 38 is hinged to an inclined material scraper 311 through the upright.

[0022] In actual operation, drive motor 32 starts, driving the concave carrier plate 33 to rotate. Its outer wall rack meshes with the inner side of the hollow rotating cylinder 34, causing the hollow rotating cylinder 34 to rotate synchronously. At the same time, the vertical guide rod 36, with the cooperation of the corrugated groove and the bearing pin, generates periodic up and down movement along the axial direction, driving the pull rod 38 and its auxiliary components to move synchronously. When the heat-conducting pressure plate 39 moves down with the pull rod 38, the conical extrusion strip 310 applies progressive pressure to the material falling into the concave carrier plate 33, using the thermal conduction effect to soften the residual organic impurities, and extruding them to separate them from the magnesium oxide particles. During the upward process, the bottom of the inclined material scraper 311 intermittently adheres to the inner wall of the concave carrier 33 and flips upward. As the concave carrier 33 rotates, it scoops up the material to prevent excessive adhesion to the inner wall of the concave carrier 33, which would affect subsequent screening. The entire process achieves deep purification of the material after primary impurity removal through a triple synergistic mechanism of rotation, extrusion, and scraping, effectively removing fine inclusions and surface impurities, and ensuring that the final product meets the purity requirements of cobalt-precipitated magnesium oxide.

[0023] Example 3: Please refer to Figure 3As shown, the pneumatic feeding assembly 5 includes a double-headed air pump 51 located on the inner wall of the top of the support frame 1 and above the concave carrier plate 33. The two airflow ports of the double-headed air pump 51 are respectively connected to the inlet bend and the outlet bend. A magnetic sieve plate 52 is fixedly installed at the bottom of the inlet bend. The surface of the magnetic sieve plate 52 is arranged with a mesh screening structure. The magnetic sieve plate 52 is arranged vertically corresponding to the concave carrier plate 33. The bottom of the outlet bend faces the material storage cylinder 53.

[0024] The specific operation process includes: after the dual-head air pump 51 is started, the air inlet bend generates negative pressure, which draws the material that has completed the secondary impurity removal in the concave carrier plate 33 into the magnetic suction screen plate 52; during this process, the magnetic suction screen plate 52 uses the built-in magnet to adsorb ferromagnetic impurities that may be mixed in, and at the same time the mesh structure screens the material by particle size, removing abnormal coarse particles or agglomerates. Subsequently, the dual-head air pump 51 switches to exhaust mode, blowing the clean material through the exhaust bend into the material storage cylinder 53 below for temporary storage, providing a stable supply for subsequent processes. The entire feeding process is completed in a closed airflow channel, avoiding external contamination, while achieving efficient and continuous material transfer and final quality assurance.

[0025] Working principle: When using this invention, the magnesium oxide raw material to be processed is first put into the cleaning frame 27, and then the settling chamber 22 is driven down by the lifting cylinder 23, so that the cleaning frame 27 is immersed in the flotation solution in the purification chamber 21. During this process, the L-shaped push-pull frame 28 automatically closes due to the interaction between the inclined surface and the inner wall of the cleaning frame 27, ensuring that the material does not overflow during the swing cleaning process; the drive motor 24 drives the longitudinal lead screw 25 to rotate in both directions, and through the linkage between the turntable 29 and the guide rod 210, the cleaning frame 27 is periodically tilted and reset, which enhances the contact efficiency between the particles and the flotation liquid, and promotes the attachment of impurities to the bubbles to float up and be discharged through the mesh. After cleaning, the lifting cylinder 23 lifts the cleaning frame 27 above the guide plate 4, and the guide rod 210 tilts the cleaning frame 27 again, pouring the clean material into the secondary impurity removal module 3. Then, the drive motor 32 starts, driving the concave carrier plate 33 to rotate, and drives the hollow rotating cylinder 34 to rotate synchronously through the meshing of the rack and the auxiliary rotating plate 35. The vertical guide rod 36 generates axial reciprocating motion under the cooperation of the corrugated rotating groove and the bearing pin, so that the heat-conducting pressure plate 39 applies heat and pressure to the material to separate residual organic matter. At the same time, the inclined material scraper 311 periodically scrapes up the material to prevent adhesion. Finally, the dual-head air pump 51 draws in the material after it has been screened by the magnetic sieve plate 52 for iron removal through negative pressure, and sends it into the material storage cylinder 53 with positive pressure, thus completing the closed-loop, efficient and high-purity impurity removal process.

[0026] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A raw material impurity removal device based on cobalt-grade magnesium oxide production, comprising a support frame (1), characterized in that: The bearing frame (1) is equipped with a primary impurity removal module (2) and a secondary impurity removal module (3) in sequence along the material conveying direction. A guide plate (4) is hinged between the primary impurity removal module (2) and the secondary impurity removal module (3). A pneumatic feeding assembly (5) is provided on the top inner wall of the bearing frame (1) and at the upper end of the corresponding secondary impurity removal module (3). The primary impurity removal module (2) includes a purification chamber (21) and a settling chamber (22). The purification chamber (21) is fixedly installed in the end area of ​​the bottom inner wall of the support frame (1), and the settling chamber (22) is movably arranged directly above the purification chamber (21). A lifting cylinder (23) is provided between the top of the settling chamber (22) and the top of the inner wall of the support frame (1). The settling chamber (22) is equipped with a drive motor (24) on the inner wall of the top end, and a longitudinal screw (25) is fixedly installed at the bottom output shaft of the drive motor (24). The bottom of the longitudinal screw (25) is movably connected to an inverted concave lifting frame (26), and a cleaning frame (27) is hinged to the middle section of the frame of the inverted concave lifting frame (26).

2. The raw material impurity removal device based on cobalt-grade magnesium oxide production according to claim 1, characterized in that, The length of the cleaning frame (27) is less than the inner diameter of the purification chamber (21), and an L-shaped sliding groove is provided on the top of the cleaning frame (27). An L-shaped push-pull frame (28) is slidably fitted on the top of the L-shaped sliding groove. A strip-shaped sliding groove is provided on the front and rear sides of the bottom of the L-shaped push-pull frame (28). A sliding shaft is fixedly installed on the front and rear frame edges of the top of the cleaning frame (27). The sliding shaft is adapted to slide inside the long groove, and a matching reset spring assembly is provided between the inner walls of the long groove. The bottom end of one side of the L-shaped push-pull frame (28) is set as a bevel.

3. The raw material impurity removal device based on cobalt-grade magnesium oxide production according to claim 1, characterized in that, Inside the settling chamber (22), a turntable (29) is spirally connected to the outside of the longitudinal screw (25). The outer diameter of the turntable (29) is adapted to the inside of the settling chamber (22). A slider is arranged on the outer wall of the turntable (29) and is adapted to slide in the vertical groove set on the inner wall of the settling chamber (22). One end of the bottom of the turntable (29) is hinged to the front end of the cleaning frame (27) with a guide rod (210).

4. The raw material impurity removal device based on cobalt-grade magnesium oxide production according to claim 1, characterized in that, The secondary impurity removal module (3) includes a bottom cylinder seat (31) fixedly installed in the center of the bottom inner wall of the support frame (1). A second drive motor (32) is embedded in the bottom cylinder seat (31), and a concave carrier plate (33) is coaxially fixedly installed at the top output shaft of the second drive motor (32). The low-position discharge end of the guide plate (4) extends to the inner cavity of the concave carrier plate (33). Several sets of racks are arranged circumferentially on the outer wall of the bottom of the concave carrier plate (33).

5. The raw material impurity removal device based on cobalt-grade magnesium oxide production according to claim 4, characterized in that, Hollow rotary cylinders (34) are movably installed at the front and rear ends of the bottom cylinder base (31), and the bottom of the hollow rotary cylinder (34) is rotatably connected to the inner wall of the bearing frame (1). An auxiliary rotary gear disc (35) is fixedly sleeved at the outer side of the hollow rotary cylinder (34) at the level of the rack of the concave carrier plate (33), and the auxiliary rotary gear disc (35) and the rack at the corresponding position of the concave carrier plate (33) mesh with each other for transmission.

6. The raw material impurity removal device based on cobalt-grade magnesium oxide production according to claim 5, characterized in that, A vertical guide rod (36) is installed longitudinally inside the hollow rotary cylinder (34), and a damping spring ring (37) is provided between the bottom of the vertical guide rod (36) and the corresponding inner wall of the hollow rotary cylinder (34). A continuous corrugated groove is opened on the outer wall of the vertical guide rod (36), and a bearing pin is provided on one side of the inner wall of the hollow rotary cylinder (34). The bearing pin is adapted to fit into the corrugated groove.

7. The raw material impurity removal device based on cobalt-grade magnesium oxide production according to claim 6, characterized in that, A horizontally arranged pull rod (38) is fixedly installed on one side of the vertical guide rod (36). The outer end of the pull rod (38) extends into the concave carrier plate (33). One set of the pull rods (38) has a heat-conducting pressure plate (39) installed on the end away from the vertical guide rod (36) through the upright. The bottom of the heat-conducting pressure plate (39) is equipped with two sets of tapered extrusion strips (310) that are wider at the top and narrower at the bottom. The bottom of the other set of the pull rods (38) is hinged to an inclined material scraper (311) through the upright.

8. The raw material impurity removal device based on cobalt-grade magnesium oxide production according to claim 1, characterized in that, The pneumatic feeding assembly (5) includes a double-headed air pump (51) located on the inner wall of the top of the support frame (1) and above the concave carrier plate (33). The two airflow ports of the double-headed air pump (51) are respectively connected to the air inlet bend and the air outlet bend. A magnetic sieve plate (52) is fixedly installed at the bottom of the air inlet bend. The surface of the magnetic sieve plate (52) is arranged with a mesh screening structure. The magnetic sieve plate (52) is set with the vertically corresponding concave carrier plate (33). The bottom of the air outlet bend is directly opposite the material storage cylinder (53).

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