A device and method for preparing carbonyl iron powder

Abstract

The present invention relates to the technical field of carbonyl iron powder, and discloses a device and a method for preparing carbonyl iron powder, wherein the device for preparing carbonyl iron powder comprises a grinding part, wherein the grinding part comprises a base, wherein the base is rotatably connected to a cylinder through a first bearing seat and a second bearing seat arranged on the upper surface thereof, and an end of the cylinder close to the second bearing seat is designed to be open. The device and the method for preparing carbonyl iron powder can effectively solve the problem that when a ball mill is used to prepare flaky carbonyl iron powder in the prior art, the production loading amount of different batches is different, while the ratio of raw materials to grinding balls in the ball mill is rated unchanged, and when the loading amount in the ball mill is too small, the impact force is insufficient and the ball milling time is prolonged; when the loading amount in the ball mill is too large, the distance between the grinding balls is too close, resulting in over-grinding, generating unnecessary fine particles or agglomerates, thereby affecting the particle size and yield of the carbonyl iron powder.

Description

Technical Field

[0001] The invention relates to the technical field of carbonyl iron powder, and in particular to a device and a method for preparing carbonyl iron powder. Background Art

[0002] Carbonyl iron powder is a multifunctional ultrafine metal powder material. Carbonyl iron powder has the advantages of high saturation magnetization intensity, high magnetic permeability and excellent temperature stability, making it one of the absorbing materials with excellent absorbing performance and a wide range of applications. Carbonyl iron powder is widely used in industry, such as binders for the manufacture of cemented carbide, magnetic materials, powder metallurgy products, catalysts and chemical raw materials.

[0003] When using a ball mill to prepare flaky carbonyl iron powder, the production loading capacity of different batches is different, while the ratio of raw materials to grinding balls inside the ball mill remains unchanged. When the loading capacity inside the ball mill is too small, it will lead to insufficient impact force and extend the ball milling time; when the loading capacity inside the ball mill is too large, the distance between the grinding balls is too close, causing excessive grinding, producing unnecessary fine particles or agglomerates, thereby affecting the particle size and output of the carbonyl iron powder. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a device and a method for preparing carbonyl iron powder, which can effectively solve the problem that when the prior art uses a ball mill to prepare flaky carbonyl iron powder, the production loading amounts of different batches are different, while the ratio of raw materials to grinding balls inside the ball mill is rated unchanged. When the loading amount inside the ball mill is too small, it will lead to insufficient impact force and extend the ball milling time; when the loading amount inside the ball mill is too large, the distance between the grinding balls is too close, resulting in excessive grinding, generating unnecessary fine particles or agglomerates, thereby affecting the particle size and output of the carbonyl iron powder.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a device for preparing carbonyl iron powder, comprising:

[0009] The grinding part includes a base, the base is rotatably connected to a cylinder through a first bearing seat and a second bearing seat arranged on the upper surface of the base, the end of the cylinder close to the second bearing seat is open, the open end of the cylinder is fixedly connected to a gear ring, the gear ring is transmission-connected to a driving unit arranged on the upper surface of the base, and the circumferential inner wall of the cylinder is fixedly connected to a lining plate group;

[0010] The adjusting part, the base is slidably connected to a sliding seat through an electric slide rail provided on its surface, the sliding seat is fixedly connected to a hollow shaft through a circular groove provided inside thereof, and the inner wall of the hollow shaft is fixedly connected to a support column, and one end of the support column close to the cylinder is fixedly connected to a grate plate for filtering external carbonyl iron powder, and a grate gap communicating with the inside of the hollow shaft is provided inside the grate plate;

[0011] The outer circumferential surface of the grate plate is provided with a telescopic mechanism that fits with the inner wall of the lining plate group, and the side of the grate plate close to the hollow shaft is provided with an adjusting member that can be used to adjust the telescopic mechanism.

[0012] Furthermore, the telescopic mechanism includes a telescopic member, a placement cavity is provided on the circumferential outer surface of the grate plate, an elastic member connected to the inner wall of the telescopic member is arranged inside the placement cavity, and a telescopic plate is fixedly connected to one side of the telescopic member close to the sliding seat.

[0013] Furthermore, a sliding block is fixedly connected to one side of the telescopic plate close to the telescopic member, and a sliding cavity connected to the placement cavity is opened at one end of the grate plate close to the support column, and the outer surface of the sliding block slides in contact with the inner wall of the sliding cavity.

[0014] Furthermore, the telescopic member is provided with multiple circular arrays with the support column as the axis, an L-shaped groove is opened on one side of the telescopic member, and an L-shaped plate is fixedly connected to the other side of the telescopic member, and the thickness of the L-shaped groove and the L-shaped plate are designed to be the same.

[0015] Furthermore, the adjusting member includes a ring plate, the circumferential inner wall of the ring plate is in contact with the circumferential outer surface of the hollow shaft, the side of the ring plate close to the sliding seat is rotatably connected to a connecting rod via a rotating shaft, the side of the telescopic plate close to the hollow shaft is fixedly connected to a shaft rod, and the connecting rod is slidably connected to the shaft rod via a sliding groove provided on its surface.

[0016] Furthermore, a side of the ring plate away from the grate plate is fixedly connected to a transmission gear via a connecting column, the transmission gear is rotationally connected to a side of the sliding seat close to the grate plate, and a reinforcing rib is fixedly connected to the middle of the connecting column.

[0017] Furthermore, a loading port is provided at one end of the cylinder body close to the first bearing seat, and a discharging port is provided on the lower surface of the hollow shaft.

[0018] A method for preparing carbonyl iron powder using a device for preparing carbonyl iron powder comprises the following steps:

[0019] S1: Use the adjusting piece to adjust the telescopic mechanism to the retracted state, start the electric slide rail, and move the grate plate toward the cylinder;

[0020] S2: Determine the corresponding ball mill volume according to the amount of processed raw materials, and move the grate plate to the required position inside the cylinder;

[0021] S3: Using the adjusting member to restore the telescopic mechanism to the expanded state, the outer surface of the telescopic member is in contact with the inner wall of the lining plate group;

[0022] S4: Add the grinding balls and external carbonyl iron powder into the cylinder from the feeding port, start the driving unit, the cylinder rotates, and the carbonyl iron powder inside the cylinder starts to be ball-milled;

[0023] S5: After ball milling, the carbonyl iron powder flows from the grate gap to the hollow shaft under the action of the air flow system, and is finally discharged from the discharge port.

[0024] Beneficial Effects

[0025] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0026] The present invention is provided with a cylinder and a grate plate, and the sliding seat is controlled by an electric slide rail to drive the grate plate to move inside the cylinder. By adjusting the position of the grate plate, the volume of the space enclosed by the grate plate and the inside of the cylinder is determined, and the internal space can be flexibly adjusted to meet the processing requirements of raw materials of different specifications and types. When the internal loading volume of the cylinder is large, the grate plate is moved toward the open end of the cylinder, and the space enclosed by the grate plate and the inside of the cylinder becomes larger; when the internal loading volume of the cylinder is small, the grate plate is moved toward the upper material port, and the space enclosed by the grate plate and the inside of the cylinder becomes smaller, thereby changing the volume of the ball-millable part inside the cylinder, controlling the ball-milling intensity, accurately obtaining the particle size distribution of the required processed raw materials, improving the consistency of the product, ensuring the contact frequency and energy transfer efficiency between the grinding balls and the raw materials, and thus improving the ball-milling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a flow chart of a method for preparing carbonyl iron powder according to an embodiment of the present invention;

[0029] Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0030] Figure 3 It is a cross-sectional schematic diagram of a cylinder and an adjusting portion according to an embodiment of the present invention;

[0031] Figure 4It is a schematic structural diagram of a sliding seat, a grate plate and a hollow shaft according to an embodiment of the present invention;

[0032] Figure 5 Schematic cross-sectional view of a hollow shaft, a support column and a grate plate in an embodiment of the present invention;

[0033] Figure 6 For the embodiment of the present invention Figure 5 A schematic diagram of the structure with a partial enlargement at the center;

[0034] Figure 7 It is a schematic diagram of the separation structure of the grate plate, the telescopic mechanism and the adjusting member according to an embodiment of the present invention;

[0035] Figure 8 This is a schematic structural diagram of a telescopic member according to an embodiment of the present invention;

[0036] Fig. 9 This is a schematic structural diagram of a ring plate, a connecting column, a reinforcing rib and a transmission gear according to an embodiment of the present invention;

[0037] Fig.10 It is a schematic diagram of the cross-sectional structure of a support column according to an embodiment of the present invention.

[0038] The numbers in the figure represent respectively: 1. grinding part; 11. base; 12. first bearing seat; 13. second bearing seat; 14. cylinder; 141. gear ring; 142. lining plate group; 15. feeding port; 2. adjusting part; 21. electric slide rail; 22. sliding seat; 23. hollow shaft; 24. supporting column; 25. grate plate; 251. grate gap; 252. placement cavity; 26. telescopic mechanism; 261. telescopic part; 2611. L-shaped groove; 2612. L-shaped plate; 262. elastic part; 263. telescopic plate; 264. slider; 265. sliding cavity; 27. adjusting part; 271. ring plate; 272. connecting rod; 273. slide groove; 274. connecting column; 275. transmission gear; 276. reinforcing rib; 28. discharge port. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The present invention will be further described below in conjunction with the embodiments.

[0041] Example:

[0042] See also Figure 2-Figure 10The present invention provides a technical solution: a device for preparing carbonyl iron powder, comprising:

[0043] The grinding part 1 comprises a base 11, the base 11 is rotatably connected to a cylinder 14 through a first bearing seat 12 and a second bearing seat 13 arranged on the upper surface thereof, the end of the cylinder 14 close to the second bearing seat 13 is open, the open end of the cylinder 14 is fixedly connected to a gear ring 141, the gear ring 141 is drivingly connected to a driving unit arranged on the upper surface of the base 11, and a lining plate group 142 is fixedly connected to the circumferential inner wall of the cylinder 14;

[0044] The adjusting part 2, the base 11 is slidably connected to the sliding seat 22 through an electric slide rail 21 opened on the surface thereof, the sliding seat 22 is fixedly connected to the hollow shaft 23 through a circular groove opened inside thereof, and the inner wall of the hollow shaft 23 is fixedly connected to a support column 24, and the end of the support column 24 close to the cylinder 14 is fixedly connected to a grate plate 25 that can be used to filter external carbonyl iron powder, and the interior of the grate plate 25 is provided with a grate gap 251 that is connected to the interior of the hollow shaft 23; the electric slide rail 21 drives the grate plate 25 to move inside the cylinder 14, so as to change the actual volume that can be ball-milled.

[0045] The outer circumferential surface of the grate plate 25 is provided with a telescopic mechanism 26 that fits with the inner wall of the lining plate group 142 , and the side of the grate plate 25 close to the hollow shaft 23 is provided with an adjusting member 27 that can be used to adjust the telescopic mechanism 26 .

[0046] The telescopic mechanism 26 includes a telescopic member 261 . A placement cavity 252 is provided on the circumferential outer surface of the grate plate 25 . An elastic member 262 connected to the inner wall of the telescopic member 261 is provided inside the placement cavity 252 . A telescopic plate 263 is fixedly connected to one side of the telescopic member 261 close to the sliding seat 22 .

[0047] A slider 264 is fixedly connected to one side of the telescopic plate 263 close to the telescopic member 261, and a sliding cavity 265 connected to the placement cavity 252 is provided at one end of the grate plate 25 close to the support column 24, and the outer surface of the slider 264 slides in contact with the inner wall of the sliding cavity 265. The slider 264, the sliding cavity 265 and the elastic member 262 cooperate with each other to enable the telescopic member 261 to be telescoped on the circumferential surface of the grate plate 25.

[0048] The telescopic members 261 are provided with a plurality of telescopic members 261 arranged in a circular array with the support column 24 as the axis, an L-shaped groove 2611 is provided on one side of the telescopic member 261, and an L-shaped plate 2612 is fixedly connected to the other side of the telescopic member 261, and the thickness of the L-shaped groove 2611 and the L-shaped plate 2612 are designed to be the same. The inner wall of the L-shaped plate 2612 of one telescopic member 261 fits the L-shaped groove 2611 of the adjacent telescopic member 261.

[0049] The adjusting member 27 includes a ring plate 271, the circumferential inner wall of the ring plate 271 fits with the circumferential outer surface of the hollow shaft 23, the side of the ring plate 271 close to the sliding seat 22 is rotatably connected to a connecting rod 272 via a rotating shaft, the side of the telescopic plate 263 close to the hollow shaft 23 is fixedly connected to a shaft, and the connecting rod 272 is slidably connected to the shaft via a sliding groove 273 provided on its surface.

[0050] A transmission gear 275 is fixedly connected to the side of the ring plate 271 away from the grate plate 25 through a connecting column 274. The transmission gear 275 is rotatably connected to the side of the sliding seat 22 close to the grate plate 25. A reinforcing rib 276 is fixedly connected to the middle of the connecting column 274. A driving gear meshing with the transmission gear 275 is provided on the surface of the sliding seat 22. The transmission gear 275 can be rotated on the surface of the sliding seat 22 by starting the driving gear.

[0051] A loading port 15 is disposed at one end of the cylinder 14 close to the first bearing seat 12 , and a discharging port 28 is disposed on the lower surface of the hollow shaft 23 .

[0052] Adjustment process before ball milling:

[0053] In actual application, in the initial state, the elastic member 262 in the telescopic mechanism 26 is in the expanded state, the circumferential outer surface of the telescopic member 261 is farthest from the grate plate 25, the telescopic member 261 is in the extended state, and the distance between the highest point of the circumference of the telescopic member 261 and the axis of the support column 24 is greater than the radius of the circumferential inner wall formed by the lining plate group 142 inside the cylinder 14, and the grate plate 25 in the adjusting part 2 is located outside the cylinder 14, and the adjusting part 2 and the grinding part 1 are in a separated state.

[0054] Start the electric slide rail 21, the sliding seat 22 moves toward the cylinder 14, and the hollow shaft 23, the support column 24 and the grate plate 25 fixedly connected to the sliding seat 22 move together with it toward the cylinder 14. The open end of the cylinder 14 is fixed with a gear ring 141 by bolts. The inner diameter of the gear ring 141 is the same as the inner wall radius of the cylinder 14. When the outer end of the grate plate 25 is about to contact the side of the gear ring 141 away from the cylinder 14, the driving gear on the surface of the sliding seat 22 is started. The driving gear is driven by the driving force set inside the sliding seat 22. The driving gear is meshed with the transmission gear 275. The transmission gear 275 rotates a small stroke under the drive of the driving gear. The transmission gear 275 slides on the outer end surface of the sliding seat 22 with the hollow shaft 23 as the axis. The transmission gear 275, the connecting column 274, the reinforcing ribs 276 and the ring plate 271 are all fixedly connected. The connecting column 274 is used to connect the transmission gear 275 and the ring plate 271 into a whole. A plurality of connecting columns 274 are arranged in a circular array with the hollow shaft 23 as the axis. The reinforcing ribs 276 ensure the stability of the structure.

[0055] In the initial state, the telescopic plate 263 will follow the telescopic member 261 in the expanded state to move away from the axis of the grate plate 25, and the shaft rod fixedly connected to the telescopic plate 263 will slide in contact with the inner wall of the slide groove 273 in the connecting rod 272, and the shaft rod will contact with the top of the inner wall of the slide groove 273. The side of the ring plate 271 away from the grate plate 25 is fixedly connected with a rotating shaft, and the distance between the rotating shaft and the shaft rod is at the maximum state. The connecting rod 272 connects the ring plate 271 with the telescopic plate 263. When the transmission gear 275 rotates slightly, the ring plate 271 will be driven to rotate slightly around the hollow shaft 23, and the rotating shaft fixedly connected to the ring plate 271 will rotate together. At this time, the connecting rod 272 is in an inclined state. As the ring plate 271 continues to rotate, the inclination of the connecting rod 272 increases, and the connecting rod 272 connects the shaft rod that is already at the top of the inner wall of its slide groove 273, giving the shaft rod a pulling force diagonally downward.

[0056] The shaft is fixedly connected to the telescopic plate 263, and the telescopic plate 263 moves vertically inside the sliding cavity 265 by means of the slider 264. Therefore, the downward pulling force given to the shaft by the connecting rod 272 is transformed into a downward force under the action of the slider 264 and the sliding cavity 265, so that the telescopic plate 263 moves toward the axis of the grate plate 25. When the telescopic plate 263 moves to the bottom of the inner wall of the slide groove 273, the telescopic plate 263 is fixedly connected to the telescopic member 261, and the telescopic member 261 moves with it. The telescopic member 261 moves downward in the sliding cavity 265 inside the grate plate 25 by means of the slider 264 inside the telescopic member 261. All the telescopic members 261 shrink toward the axis of the grate plate 25. The elastic member 262 located between the telescopic member 261 and the placement cavity 252 opened on the outer surface of the grate plate 25 is compressed by the downward squeezing force of the telescopic member 261. During this process, the outer surface of the L-shaped groove 2611 opened on one side of the telescopic part 261 and the inner wall of the L-shaped plate 2612 on the adjacent side of the telescopic part 261 always fit and slide together, and the inner wall of the L-shaped plate 2612 on one side of the telescopic part 261 and the outer surface of the L-shaped groove 2611 opened on another adjacent telescopic part 261 always fit and slide together.

[0057] At this time, all the telescopic parts 261 are in a retracted state, and the inner wall of the telescopic part 261 fits with the circumferential outer surface of the grate plate 25. In this state, the circumferential area composed of all the telescopic parts 261 is smaller than the circumferential area composed of the lining plate group 142 inside the cylinder 14. Under the action of the electric slide rail 21, the grate plate 25 can move along with the sliding seat 22, the hollow shaft 23 and the support column 24 until the grate plate 25 moves to the inside of the cylinder 14. The cylinder 14 is designed with a single-sided opening. Due to the movable nature of the grate plate 25, in a single use, the space enclosed by the grate plate 25 and the inside of the cylinder 14 is the volume of the device used this time. Therefore, when using the device, the staff will equip it with a rated number of grinding balls based on the amount of raw materials produced this time and the specified ball-to-material ratio. The total value of the grinding balls and the raw material carbonyl iron powder particles is the loading capacity. According to the internal calculation value, the grinding volume that matches the loading capacity is obtained, and the electric slide rail 21 moves the grate plate 25 to a position where the volume enclosed by the grate plate 25 and the cylinder 14 is equal to the required volume.

[0058] According to the number of raw materials in the production batch, the grate plate 25 is moved to a suitable position. At this time, the driving gear on the surface of the sliding seat 22 drives the transmission gear 275 meshing with it to reverse. The transmission gear 275 takes the hollow shaft 23 as the axis and slides on the outer end surface of the sliding seat 22 until it moves to the initial position of the transmission gear 275. The corresponding transmission gear 275 will drive the connecting column 274, the reinforcing rib 276 and the ring plate 271 to rotate together. The ring plate 271 returns to its initial position during the rotation until the three points of the shaft, the rotating shaft and the axis of the support column 24 are on the same axis. The inner wall of the slide groove 273 in the connecting rod 272 fits with the shaft rod. During this process, the top of the inner wall of the slide groove 273 and the outer surface of the shaft rod are always in contact during the return process of the connecting rod 272. The shaft rod and the connecting rod 272 produce relative displacement, and the telescopic plate 263 and the telescopic member 261 fixedly connected to the shaft rod move together. The elastic member 262 is slightly expanded as the telescopic plate 263 moves away from the circumferential outside of the grate plate 25 until the circumferential outer surface of the telescopic plate 263 fits with the inner wall of the lining plate group 142 inside the cylinder 14. At this time, the elastic member 262 is not fully unfolded and has elastic potential energy, which can make the outer surface of the telescopic member 261 fit tightly against the inner wall of the lining plate group 142. All the telescopic members 261 are unfolded to fit against the inner wall of the lining plate group 142, and the L-shaped grooves 2611 between adjacent telescopic members 261 fit against the L-shaped plates 2612. After unfolding, the material placed inside the cylinder 14 will not leak from the telescopic member 261 to the space enclosed by the outer surface of the hollow shaft 23 and the cylinder 14. The unfolded telescopic member 261 is away from the side of the connecting rod 272, and its L-shaped plate 2612 slides against the L-shaped groove 2611. After the L-shaped plate 2612 moves away, the surface of the telescopic member 261 with the L-shaped groove 2611 is left in a relatively sealed state.

[0059] Ball milling process of flake carbonyl iron powder:

[0060] The granular carbonyl iron powder raw material and grinding balls are put into the cylinder 14 from the feeding port 15, and the driving unit on the upper surface of the base 11 starts to operate, driving the gear ring 141 to rotate, and the gear ring 141 is fixedly connected to the cylinder 14. The cylinder 14 starts to operate under the action of the gear ring 141 and the driving unit, and the cylinder 14 rotates with the center of the first bearing seat 12 and the second bearing seat 13 as the axis. The first bearing seat 12 and the second bearing seat 13 can support the cylinder 14 to ensure its balance during rotation. The cylinder 14 is fixedly connected with a liner group 142 by bolts. The liner groups 142 are interference fit, and the surface of the liner group 142 is relatively smooth. The granular carbonyl iron powder raw material and the grinding balls are in the space surrounded by the grate plate 25 and the inner wall of the cylinder 14 to be ground.

[0061] During the grinding process, the grate plate 25 remains stationary. As the cylinder 14 starts to rotate, the grinding balls are lifted to a certain height due to inertia and then fall under the action of gravity, impacting and grinding the granular carbonyl iron powder raw material. The carbonyl iron powder raw material and the grinding balls slide and roll in the cylinder 14 as the cylinder 14 rotates. This complex movement allows the granular carbonyl iron powder raw material to be effectively ground. During the grinding process, the equipment is equipped with an air flow system to help the tiny flaky carbonyl iron powder after grinding to flow out from the grate gap 251 at the grate plate 25 to the inside of the hollow shaft 23. The size of the grate gap 251 is determined according to the process so as to screen out qualified flaky carbonyl iron powder. The flaky carbonyl iron powder in the hollow shaft 23 continues to follow the air flow system and flows from the discharge port 28 at the end into the subsequent powder selection equipment or dust collection system. At the same time, during the grinding process, due to friction and impact, the steel balls and carbonyl iron powder will generate a lot of heat. The air flow system can take away this heat to prevent the internal temperature of the ball mill from being too high and protect the equipment from heat damage.

[0062] The process of resetting after ball milling:

[0063] When all the raw materials inside the cylinder 14 are ground and reach the required state, the power supply of the driving unit is disconnected. Since the grinding balls and the initial raw materials are placed inside the cylinder 14 from the loading port 15, the lining plate on the inner wall of the cylinder 14 near the loading port 15 is more worn. Therefore, the degree of wear in the axial range inside the cylinder 14 deviates, and due to the continuous rotation of the ball mill, the degree of wear in the radial range inside the cylinder 14 is basically the same. Therefore, when the grate plate 25 moves to the outside of the cylinder 14, the telescopic mechanism 26 arranged outside the circumference of the grate plate 25 needs to be retracted. This retraction process is consistent with the contraction process of tightening the telescopic member 261 by driving the ring plate 271 through the transmission gear 275 during the adjustment process before grinding. When all telescopic parts 261 are in the retracted state, the circumferential area formed by all telescopic parts 261 is smaller than the circumferential area formed by the lining plate group 142 inside the cylinder 14, and the grate plate 25 and the telescopic mechanism 26 on its circumferential outer surface can slide smoothly outward inside the cylinder 14 without being stuck.

[0064] The sliding seat 22 drives the grate plate 25 to move in the electric slide rail 21, so that the grate plate 25 moves to the side away from the cylinder 14 until it is completely separated from the cylinder 14. After it is completely separated, the telescopic mechanism 26 set on the outer circumference of the grate plate 25 is restored and unfolded. This unfolding process is consistent with the unfolding process of the ring plate 271 driven by the transmission gear 275 to move the telescopic member 261 before grinding. After the telescopic mechanism 26 is fully unfolded, the telescopic member 261 can be cleaned. At this time, the open end of the cylinder 14 is in an open state. The staff uses a special cleaning tool to clean and discharge the remaining grinding balls and a small amount of ground carbonyl iron powder inside the cylinder 14. At this point, the ball milling is completed and waits for the next use.

[0065] In summary, the ball milling process has the following advantages:

[0066] Advantage 1: By moving the sliding seat 22 and the support column 24 through the electric slide rail 21, the position of the grate plate 25 inside the cylinder 14 can be accurately controlled, so as to adjust the size of the space between the grate plate 25 and the inner wall of the cylinder 14, and the internal space can be flexibly adjusted to meet the processing requirements of raw materials of different specifications and types. When the internal load of the cylinder 14 is large, the grate plate 25 is moved toward the open end of the cylinder 14, and the space enclosed by the grate plate 25 and the inside of the cylinder 14 becomes larger; when the internal load of the cylinder 14 is small, the grate plate 25 is moved toward the upper material port 15, and the space enclosed by the grate plate 25 and the inside of the cylinder 14 becomes smaller, thereby changing the volume of the ball-millable part inside the cylinder 14, controlling the ball-milling intensity, and accurately obtaining the particle size distribution of the required processed raw materials, improving the consistency of the product, ensuring the contact frequency and energy transfer efficiency between the grinding balls and the raw materials, and thus improving the ball-milling efficiency.

[0067] Advantage 2: Due to its unique equipment characteristics, the internal lining plate group 142 of the ball mill is prone to wear. The telescopic mechanism 26 arranged on the circumference of the grate plate 25 can adapt to the lining plates with different degrees of wear in different use stages. The wear can be compensated by adjusting the position of the telescopic member 261 to maintain the grinding efficiency.

[0068] Advantage three: Since the grinding balls and the initial processed raw materials are placed inside the cylinder 14 from the feeding port 15, the lining plate on the inner wall of the cylinder 14 close to the feeding port 15 wears more severely, while the lining plate on the inner wall of the cylinder 14 away from the feeding port 15 wears normally. Therefore, in the same period, the degree of wear of the lining plate group 142 inside the cylinder 14 within the axial range deviates, and the telescopic mechanism 26 can adapt to the grate plate 25 at different positions.

[0069] Advantage 4: During the ball milling process, the particle size and shape of the raw materials will change. In the early stage of ball milling, a larger impact force may be required to break larger raw material particles, while in the later stage, a smaller impact force is required to avoid over-grinding and adhesion of the raw materials. By changing the position of the grate plate 25, a variable volume ball mill is obtained, which can adapt to the needs of grinding balls at different stages, and the activity space and impact force of the grinding balls can be changed by adjusting the volume.

[0070] Advantage 5: By precisely controlling the position of the grate plate 25 to change the volume required for ball milling conditions, unnecessary energy consumption and waste of raw materials can be reduced, while reducing operational risks. At the same time, after the ball milling is completed, the grate plate 25 can be completely moved to the outside of the cylinder 14, which makes it very easy to clean the interior of the equipment and reduces maintenance costs.

[0071] Advantage six: the L-shaped grooves 2611 and the L-shaped plates 2612 opened on the outer surfaces of adjacent telescopic members 261 fit together. When the telescopic members 261 are in the unfolded state, there is no gap on the surface of the telescopic members 261 close to the feeding port 15, and the telescopic members 261 are in a relatively sealed state, thereby preventing unqualified raw materials from flowing out. The air flow system can accelerate the outflow of qualified raw materials from the grate gaps 251, and at the same time can effectively remove a large amount of heat generated during the ball milling process, thereby improving production safety.

[0072] See also Figure 1 Another aspect of the present invention provides a method for preparing carbonyl iron powder using a device for preparing carbonyl iron powder, comprising the following steps:

[0073] S1: Use the adjusting member 27 to adjust the telescopic mechanism 26 to a retracted state, start the electric slide rail 21, and move the grate plate 25 toward the cylinder 14;

[0074] S2: Determine the corresponding ball mill volume according to the amount of the processed raw materials, and move the grate plate 25 to the required position inside the cylinder 14;

[0075] S3: Using the adjusting member 27 to restore the telescopic mechanism 26 to the expanded state, the outer surface of the telescopic member 261 is in contact with the inner wall of the lining plate assembly 142;

[0076] S4: Add the grinding balls and the external carbonyl iron powder into the cylinder 14 from the feeding port 15, start the driving unit, the cylinder 14 rotates, and the carbonyl iron powder in the cylinder 14 starts to be ball-milled;

[0077] S5: After ball milling, the carbonyl iron powder flows from the grate gap 251 to the hollow shaft 23 under the action of the wind flow system, and is finally discharged from the discharge port 28.

[0078] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for preparing carbonyl iron powder, characterized in that: include: A grinding part (1), the grinding part (1) comprising a base (11), the base (11) being rotatably connected to a cylinder (14) via a first bearing seat (12) and a second bearing seat (13) arranged on the upper surface thereof, the end of the cylinder (14) close to the second bearing seat (13) being designed to be open, the open end of the cylinder (14) being fixedly connected to a gear ring (141), the gear ring (141) being transmission-connected to a driving unit arranged on the upper surface of the base (11), and the circumferential inner wall of the cylinder (14) being fixedly connected to a lining plate group (142); The adjusting part (2) comprises a base (11) slidably connected to a sliding seat (22) via an electric slide rail (21) provided on the surface thereof, the sliding seat (22) being fixedly connected to a hollow shaft (23) via a circular groove provided inside thereof, and a support column (24) being fixedly connected to the inner wall of the hollow shaft (23), and a grate plate (25) for filtering external carbonyl iron powder being fixedly connected to one end of the support column (24) close to the cylinder (14), and a grate slit (251) communicating with the inside of the hollow shaft (23) being provided inside the grate plate (25); The outer circumferential surface of the grate plate (25) is provided with a telescopic mechanism (26) that fits with the inner wall of the lining plate group (142), and an adjusting member (27) that can be used to adjust the telescopic mechanism (26) is provided on one side of the grate plate (25) close to the hollow shaft (23); The telescopic mechanism (26) comprises a telescopic member (261), a placement cavity (252) is provided on the circumferential outer surface of the grate plate (25), an elastic member (262) connected to the inner wall of the telescopic member (261) is arranged inside the placement cavity (252), a telescopic plate (263) is fixedly connected to the side of the telescopic member (261) close to the sliding seat (22), a sliding block (264) is fixedly connected to the side of the telescopic plate (263) close to the telescopic member (261), a sliding block (264) is provided at one end of the grate plate (25) close to the support column (24) and connected to the placement cavity (252), the outer surface of the sliding block (264) slides in contact with the inner wall of the sliding cavity (265), and the adjusting member (27) comprises a ring The ring plate (271) has a circumferential inner wall that fits with the circumferential outer surface of the hollow shaft (23); the side of the ring plate (271) close to the sliding seat (22) is rotatably connected to a connecting rod (272) via a rotating shaft; the side of the telescopic plate (263) close to the hollow shaft (23) is fixedly connected to a shaft; the connecting rod (272) is slidably connected to the shaft via a sliding groove (273) provided on its surface; the side of the ring plate (271) away from the grate plate (25) is fixedly connected to a transmission gear (275) via a connecting column (274); the transmission gear (275) is rotatably connected to the side of the sliding seat (22) close to the grate plate (25); and a reinforcing rib (276) is fixedly connected to the middle of the connecting column (274).

2. The device for preparing carbonyl iron powder according to claim 1, characterized in that: The telescopic member (261) is provided with a plurality of circular arrays with the support column (24) as the axis, an L-shaped groove (2611) is provided on one side of the telescopic member (261), and an L-shaped plate (2612) is fixedly connected to the other side of the telescopic member (261), and the thickness of the L-shaped groove (2611) and the L-shaped plate (2612) are designed to be the same.

3. The device for preparing carbonyl iron powder according to claim 1, characterized in that: A loading port (15) is provided at one end of the cylinder (14) close to the first bearing seat (12), and a discharging port (28) is provided on the lower surface of the hollow shaft (23).

4. A method for preparing carbonyl iron powder using the device for preparing carbonyl iron powder according to claim 3, characterized in that: The steps include: S1: using the adjusting member (27) to adjust the telescopic mechanism (26) to a retracted state, starting the electric slide rail (21), and moving the grate plate (25) toward the cylinder (14); S2: Determine the corresponding ball mill volume according to the amount of the processed raw materials, and move the grate plate (25) to the required position inside the cylinder (14); S3: using the adjusting member (27) to restore the telescopic mechanism (26) to the expanded state, so that the outer surface of the telescopic member (261) fits with the inner wall of the lining plate assembly (142); S4: adding grinding balls and external carbonyl iron powder into the cylinder (14) from the feeding port (15), starting the driving unit, rotating the cylinder (14), and starting ball milling of the carbonyl iron powder inside the cylinder (14); S5: After ball milling, the carbonyl iron powder flows from the grate gap (251) to the hollow shaft (23) under the action of the wind flow system, and is finally discharged from the discharge port (28).

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