Metal silicon multi-stage crushing unit

Abstract

The utility model relates to the technical field of silicon powder production equipment discloses metal silicon powder multistage crusher unit, including primary crusher, secondary crusher, screening machine and transmission device, the export of primary crusher with one inlet end intercommunication of secondary crusher, secondary crusher with screening machine connects, and the coarse material export of screening machine passes through transmission device and another inlet end intercommunication of secondary crusher, the utility model closes the cycle crushing and effectively guarantees that metal silicon raw materials are fully smashed, and at the same time, the work efficiency and practicality are effectively improved to the metal silicon raw materials and carry out the classification crushing.

Description

Technical Field

[0001] This utility model relates to the technical field of silicon powder production equipment, specifically to a multi-stage crushing unit for metallic silicon powder. Background Technology

[0002] Metallic silicon powder, also known as silicon powder or silicon micropowder, is a gray or black powdery substance whose main component is silicon (Si), with a purity typically above 98%. Metallic silicon powder possesses high purity, high activity, and good electrical conductivity, making it suitable for high-precision industrial applications. In practice, a crushing device is required to crush the metallic silicon raw material. This device offers advantages such as structural stability, convenient crushing, and good performance.

[0003] The prior art discloses a pulverizing device for silicon carbide production, with publication number CN211612955U. The device includes a pulverizing body, a motor, a belt, a pulley, a filter screen, a feed pipe, a baffle, a support frame, an air duct, a suction port, a rotating rod, a pulverizing roller, a discharge port, a pulverizing wall, pulverizing blades, and a pulverizing inlet. When using this pulverizing device, first check whether the various structures of the pulverizing body are intact. After the inspection, start the motor. The motor drives the rotating rod to rotate via the pulley and belt, which in turn drives the pulverizing roller at its lower end to rotate. The device is activated by connecting the air duct above the feed port to an external exhaust fan. Silicon carbide raw material is then fed into the main body of the crushing device through the feed pipe, slides down the baffle to the crushing port, and falls between the crushing roller and the crushing wall. The crushing blades on the crushing roller and the crushing wall crush the silicon carbide raw material. The crushed silicon carbide raw material is discharged through the discharge port. The feed port then filters the crushed silicon carbide powder, which is smaller than the filter screen aperture, through the filter screen and transports it to a designated location via the air duct. This completes the series of operations of the silicon carbide production crushing device.

[0004] In the aforementioned utility model, the motor drives the crushing roller to rotate via a belt, pulley, and rotating rod. The crushing roller works in conjunction with the crushing wall to crush the raw materials. However, this method can only perform one stage of crushing and cannot guarantee that the raw materials are fully crushed. At the same time, larger raw materials cannot enter the space between the crushing roller and the crushing wall, causing the crushing process to stop and reducing the practicality of this utility model. Utility Model Content

[0005] The purpose of this invention is to provide a closed-loop crushing system that effectively ensures that the silicon metal raw material is fully crushed. At the same time, the system can perform graded crushing of the silicon metal raw material to effectively improve working efficiency and practicality.

[0006] This utility model is implemented as follows:

[0007] A multi-stage crushing unit for silicon metal powder includes a primary crusher, a secondary crusher, a screening machine, and a first conveying device. The outlet end of the primary crusher is connected to one inlet end of the secondary crusher. The secondary crusher is connected to the screening machine. The coarse material outlet of the screening machine is connected to the other inlet end of the secondary crusher through the conveying device.

[0008] Furthermore, the primary crusher includes a primary crushing box, a crushing rotor is rotatably connected inside the primary crushing box, a hammer is fixedly connected to the outer ring side of the crushing rotor, and multiple impact plates are connected to the primary crushing box, with the multiple impact plates arranged around the crushing rotor.

[0009] Furthermore, the secondary crusher includes a secondary crushing box, in which a crushing roller is rotatably connected. The inner sidewall of the secondary crushing box has a crushing groove that matches the surface of the crushing roller. The crushing groove and the crushing roller are movably embedded in each other. A grinding ball is coaxially connected below the crushing roller. A grinding groove is fixedly connected to the secondary crushing box. The inner sidewall of the grinding groove is in contact with the surface of the grinding ball. A material outlet is provided at the bottom of the grinding groove. The bottom of the grinding ball passes through the bottom discharge port of the secondary crushing box and is connected to the screening machine.

[0010] Furthermore, the screening machine includes a screening box, in which a screening screen and a guide brush are provided. The guide brush is coaxially connected to the secondary crusher and contacts the upper surface of the screening screen. The screening box has a coarse material outlet and a fine material outlet on its side and bottom, respectively. The edge of the screening screen is located within the discharge range of the coarse material outlet.

[0011] Furthermore, the screening screen is in the shape of an inverted bucket, and the inclination of the inclined surface is less than 20°.

[0012] Furthermore, the guide brush is L-shaped, with one end of the horizontal part of the guide brush coaxially connected to the secondary crusher, the corner of the guide brush fitting into the connection between the screening mesh and the screening box, and the vertical part of the guide brush contacting and fitting into the inner wall of the screening box.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention's closed-loop crushing system effectively ensures that the silicon metal raw material is fully crushed. At the same time, the graded crushing of the silicon metal raw material effectively improves work efficiency and practicality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0017] Figure 2 yes Figure 1 A magnified view of the central section;

[0018] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0019] Reference numerals: 1. Primary crushing box; 2. Crushing rotor; 3. Hammer plate; 4. Impact plate; 5. Secondary crushing box; 6. Crushing roller; 7. Crushing trough; 8. Grinding ball; 9. Grinding trough; 10. Conveying device; 11. Screening box; 12. Screening screen; 13. Guide brush. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] Please see Figures 1 to 3 A multi-stage crushing unit for silicon metal powder includes a primary crusher, a secondary crusher, a screening machine, and a first conveying device 10. The outlet end of the primary crusher is connected to one inlet end of the secondary crusher. The secondary crusher is connected to the screening machine. The coarse material outlet of the screening machine is connected to the other inlet end of the secondary crusher through the conveying device 10.

[0022] Please see Figures 1 to 3The primary crusher includes a primary crushing box 1, a crushing rotor 2 rotatably connected inside the primary crushing box 1, a hammer 3 fixedly connected to the outer ring side of the crushing rotor 2, and multiple impact plates 4 connected to the primary crushing box 1, with the multiple impact plates 4 arranged around the crushing rotor 2.

[0023] Please see Figures 1 to 3 The secondary crusher includes a secondary crushing box 5, in which a crushing roller 6 is rotatably connected. The inner sidewall of the secondary crushing box 5 has a crushing groove 7 that matches the surface of the crushing roller 6. The crushing groove 7 and the crushing roller 6 are movably embedded in each other. A grinding ball 8 is coaxially connected below the crushing roller 6. A grinding groove 9 is fixedly connected to the secondary crushing box 5. The inner sidewall of the grinding groove 9 is in contact with the surface of the grinding ball 8. A material outlet is opened at the bottom of the grinding groove 9. The bottom of the grinding ball 8 passes through the bottom discharge port of the secondary crushing box 5 and is connected to the screening machine.

[0024] Please see Figures 1 to 3 The screening machine includes a screening box 11, in which a screening screen 12 and a guide brush 13 are provided. The guide brush 13 is coaxially connected to the secondary crusher and contacts the upper surface of the screening screen 12. The sides and bottom of the screening box 11 are respectively provided with a coarse material outlet and a fine material outlet. The edge of the screening screen 12 is located within the discharge range of the coarse material outlet.

[0025] Please see Figures 1 to 3 The screening screen 12 is in the shape of an inverted bucket, and the inclination of the inclined surface is less than 20°.

[0026] Please see Figures 1 to 3 The guide brush 13 is L-shaped. One end of the horizontal part of the guide brush 13 is coaxially connected to the secondary crusher. The corner of the guide brush 13 is attached to the connection between the screening screen 12 and the screening box 11. The vertical part of the guide brush 13 is in contact with the inner wall of the screening box 11.

[0027] In practical applications, large pieces of material enter the primary crushing chamber 1 from the inlet end of the primary crusher. The motor drives the crushing rotor 2 of the primary crusher to rotate at high speed (usually 500-1500 r / min), which in turn drives the hammers 3 connected to the crushing rotor 2 to rotate at high speed. The material is violently impacted by the high-speed rotating hammers 3, and after gaining kinetic energy, the material flies out tangentially. At this point, the material is initially crushed, and due to centrifugal force, it forms high-speed motion. The high-speed flying material hits the impact plate 4 on the primary crushing chamber 1, generating a rebound effect, and returns to the impact area of ​​the hammers 3 for further crushing. After primary crushing... The crushed material enters the secondary crushing chamber 5 of the secondary crusher. Driven by a motor, the crushing roller 6, grinding balls 8, and guide brush 13 rotate coaxially. Due to centrifugal force, the material enters the space between the crushing roller 6 and the grinding trough 7 for further crushing and refining. The refined material falls into the space between the grinding balls 8 and the grinding trough 9 due to gravity, where the rotating grinding balls 8 grind and pulverize the material again. This multiple crushing and grinding process effectively improves the quality of the metallic silicon powder. The pulverized material then enters the screening chamber 11 of the screening machine through the material outlet. The material falls onto the screening screen 12, which is an inverted bucket shape with an inclined surface. When the angle is less than 20°, due to the large mass and inertia of large particles, they can roll down to the edge of the screening screen 12, assisting in the initial separation of coarse and fine materials. The rotating guide brush 13 agitates the material, allowing qualified material to pass through the screening screen 12 at an accelerated speed and exit through the fine material outlet at the bottom. Coarse particles that fail to pass through the screening screen 12 roll down to the edge of the inclined screen 12 and are collected by the guide brush 13 at the coarse material outlet, then discharged to the conveying device 10. The corner of the "L"-shaped guide brush 13 fits into the connection between the screening screen 12 and the screening box 11, and the vertical part of the guide brush 13 fits into the inner surface of the screening box 11. The side wall facilitates the collection and discharge of material from the connection between the screening screen 12 and the screening box 11 to the conveying device 10. The conveying device 10 is a auger. The coarse particles screened out enter the feed end of the conveying device 10 from the screening machine. Driven by the motor, the material is conveyed to the top of the crushing roller 6 of the secondary crushing box 5 and discharged. The coarse particles screened out are then ground and crushed again by the crushing roller 6 and the grinding balls 8, forming a closed crushing process until qualified. The closed-loop crushing of this utility model effectively ensures that the silicon metal raw material is fully crushed. At the same time, the graded crushing of the silicon metal raw material effectively improves the working efficiency and practicality.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage crushing unit for metallic silicon powder, characterized in that: It includes a primary crusher, a secondary crusher, a screening machine, and a conveying device (10). The outlet end of the primary crusher is connected to one inlet end of the secondary crusher. The secondary crusher is connected to the screening machine. The coarse material outlet of the screening machine is connected to the other inlet end of the secondary crusher through the conveying device (10).

2. The multi-stage crushing unit for metallic silicon powder according to claim 1, characterized in that, The primary crusher includes a primary crushing box (1), a crushing rotor (2) is rotatably connected inside the primary crushing box (1), a hammer (3) is fixedly connected to the outer ring side of the crushing rotor (2), and multiple impact plates (4) are connected to the primary crushing box (1), with the multiple impact plates (4) arranged around the crushing rotor (2).

3. The multi-stage crushing unit for metallic silicon powder according to claim 1, characterized in that, The secondary crusher includes a secondary crushing box (5), a crushing roller (6) is rotatably connected inside the secondary crushing box (5), a crushing groove (7) matching the surface of the crushing roller (6) is opened on the inner side wall of the secondary crushing box (5), the crushing groove (7) and the crushing roller (6) are movably embedded in each other, a grinding ball (8) is coaxially connected below the crushing roller (6), a grinding groove (9) is fixedly connected to the secondary crushing box (5), the inner side wall of the grinding groove (9) is in contact with the surface of the grinding ball (8), a material outlet is opened at the bottom of the grinding groove (9), and the bottom of the grinding ball (8) passes through the bottom discharge port of the secondary crushing box (5) and is connected to the screening machine.

4. The multi-stage crushing unit for metallic silicon powder according to claim 1, characterized in that, The screening machine includes a screening box (11), in which a screening screen (12) and a guide brush (13) are provided. The guide brush (13) is coaxially connected to the secondary crusher. The guide brush (13) is in contact with the upper surface of the screening screen (12). The side and bottom of the screening box (11) are respectively provided with a coarse material outlet and a fine material outlet. The edge of the screening screen (12) is located within the discharge range of the coarse material outlet.

5. The multi-stage crushing unit for metallic silicon powder according to claim 4, characterized in that, The screening mesh (12) is in the shape of an inverted bucket, and the inclination of the inclined surface is less than 20°.

6. The multi-stage crushing unit for metallic silicon powder according to claim 4, characterized in that, The guide brush (13) is L-shaped. One end of the horizontal part of the guide brush (13) is coaxially connected to the secondary crusher. The corner of the guide brush (13) is attached to the connection between the screening screen (12) and the screening box (11). The vertical part of the guide brush (13) is in contact with the inner wall of the screening box (11).

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