Metal silicon powder production system

Abstract

The utility model provides a metal silicon powder production system and relates to the technical field of metal silicon powder production. The metal silicon powder production system comprises: a feeding unit for inputting a silicon material; a primary crushing unit is further arranged, is communicated with the feeding unit and is used for processing a silicon material to produce silicon particles; a secondary crushing unit is further arranged, and the secondary crushing unit communicates with the primary crushing unit through a conveying unit; the secondary crushing unit is used for processing silicon particles to produce silicon powder; the screening and collecting unit is communicated with the secondary crushing unit and is used for screening the silicon powder to produce qualified silicon powder; wherein the conveying unit can be communicated with the primary crushing unit and the plurality of secondary crushing units; the production efficiency, the plant space utilization rate, the equipment utilization rate and the personnel efficiency in the metal silicon powder production process can be comprehensively improved.

Description

Technical Field

[0001] This utility model relates to the field of metallic silicon powder production technology, specifically a metallic silicon powder production system. Background Technology

[0002] As the world's largest producer of industrial silicon, China occupies a pivotal position in the global industrial silicon industry chain, and its production and supply capabilities have a profound impact on the stability and development of the global industrial silicon market. As a key raw material for polysilicon production, the stable supply of metallic silicon powder is crucial for ensuring production continuity and cost control. Currently, silicon ingot grinding equipment on the market generally adopts a single-line production mode, although multiple units are combined for production. For example, the authorized announcement number CN219193574U, entitled "A High-Efficiency Complete Set of Metallic Silicon Powder Production Equipment," unloads metallic silicon ingots into a ground silo, feeds them to a conveyor via a main vibrating feeder, and then the conveyor transports the silicon ingots to a mobile feeding cart. The mobile feeding cart moves to the first silo of several complete sets of production units for feeding. This scheme improves efficiency through continuous production using several complete sets of production units.

[0003] However, when faced with large-scale, continuous production, the aforementioned patented solutions and other existing technologies have significant limitations in terms of production efficiency, equipment utilization, and cost control capabilities, and also have low factory space utilization and personnel efficiency. Utility Model Content

[0004] This invention addresses the significant limitations in production efficiency, equipment utilization, plant space utilization, and personnel efficiency of existing silicon metal powder production systems by providing a silicon metal powder production system that comprehensively improves these aspects.

[0005] The technical solution adopted in this utility model is:

[0006] A silicon metal powder production system, comprising:

[0007] The feeding unit is used to input silicon material;

[0008] A primary crushing unit, connected to the feeding unit, is used to process silicon material to produce silicon particles;

[0009] The secondary crushing unit is connected to the primary crushing unit via a transport unit; the secondary crushing unit is used to process silicon particles to produce silicon powder.

[0010] The screening and collection unit is connected to the secondary crushing unit and is used to screen silicon powder to produce qualified silicon powder.

[0011] The transport unit can connect the primary crushing unit and multiple secondary crushing units.

[0012] Furthermore, the feeding unit has at least a raw material buffer bin and a first vibrating feeder; the first discharge port of the raw material buffer bin is connected to the first vibrating feeder; and the first vibrating feeder is connected to the primary crushing unit.

[0013] Furthermore, the transport unit has at least a transport belt; a coarse material elevator is provided between the transport belt and the primary crushing unit; and several production line hoppers are provided on the side of the transport belt, and an unloading trolley is provided on the transport belt; the unloading trolley can unload the silicon particles on the transport belt into the production line hopper.

[0014] Furthermore, the secondary crushing unit has at least a second vibrating feeder and a secondary crusher; the second vibrating feeder is connected to the discharge end of the production line silo; the feed end of the secondary crusher is connected to the second vibrating feeder; and the screening and collecting unit has at least a primary screening machine, the feed end of the primary screening machine being connected to the discharge end of the secondary crusher.

[0015] Furthermore, the secondary crushing unit also includes at least a dual cyclone separator and a cyclone collection bin; the dual cyclone separator is connected to the discharge end of the secondary crusher, and the dust removal powder outlet of the dual cyclone separator is connected to the dust collection unit; the silicon powder outlet of the dual cyclone separator is connected to the cyclone collection bin; and the discharge end of the cyclone collection bin is connected to the screening and collection unit.

[0016] Furthermore, the secondary crushing unit also has at least a tertiary crusher, the feed end of which is connected to the unqualified silicon powder discharge end of the primary screening machine; and the screening and collecting unit also has at least a secondary screening machine, the feed end of which is connected to the discharge end of the tertiary crusher.

[0017] Furthermore, a return unit is provided between the unqualified silicon powder discharge end of the secondary screening machine and the transport unit.

[0018] Furthermore, the qualified silicon powder discharge end of the screening machine of the screening and collection unit is connected to a finished product buffer bin, and the undersize powder discharge end of the screening machine of the screening and collection unit is connected to an undersize powder bin.

[0019] Furthermore, the discharge end of the finished product buffer bin is connected to an automatic packaging line and / or a finished product elevator; the finished product elevator is connected to a system discharge port.

[0020] Furthermore, it also includes:

[0021] The PLC control unit is used to control the operation of the feeding unit, primary crushing unit, secondary crushing unit and screening and collection unit.

[0022] The beneficial effects of this utility model are:

[0023] 1. This utility model improves production efficiency by setting up a transport unit between the primary and secondary crushing units, connecting the primary crushing unit and multiple secondary crushing units. Primary coarse crushing is achieved through centralized feeding, followed by secondary crushing via belt conveyor. The original forklift and overhead crane feeding method is optimized to centralized belt conveyor, improving personnel efficiency and reducing cross-operation between forklifts, overhead cranes, and personnel, thus significantly reducing safety risks. This achieves a comprehensive improvement in production efficiency, plant space utilization, equipment utilization, and personnel efficiency, while reducing equipment investment. It solves the problem that existing silicon powder production systems have significant limitations in production efficiency, equipment utilization, plant space utilization, and personnel efficiency.

[0024] 2. This utility model also solves the noise problem caused by multiple single-line crushing by setting up both the feeding unit and the primary crushing unit outside the plant through centralized primary crushing. This reduces occupational health hazards for relevant positions. Furthermore, the smaller silicon blocks after coarse crushing reduce wear and tear on the equipment during transportation. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a front view of the production system according to an embodiment of the present utility model;

[0027] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 This utility model Figure 1 Enlarged view of point B in the middle;

[0029] Figure 4 This is a schematic diagram of the production system of Embodiment 1 of this utility model;

[0030] Figure 5 This is a schematic diagram of the production system of Embodiment 2 of this utility model;

[0031] Figure 6This is a schematic diagram of the production system of Embodiment 3 of this utility model;

[0032] Figure 7 This is a schematic diagram of the production system of Embodiment 4 of this utility model.

[0033] Reference numerals: 100-feeding unit, 110-raw material buffer bin, 111-first feed inlet, 112-first discharge outlet, 120-first vibrating feeder;

[0034] 200 - Primary crushing unit; 210 - Primary crusher;

[0035] 300 - Transport unit, 310 - Coarse material elevator, 320 - Conveyor belt, 322 - Unloading trolley, 330 - Production line hopper, 331 - Second inlet, 332 - Second outlet, 333 - Flow scale;

[0036] 400 - Secondary crushing unit, 410 - Secondary vibrating feeder, 420 - Secondary crusher, 430 - Tertiary crusher, 440 - Double cyclone separator, 450 - Cyclone collection bin, 460 - Silicon powder elevator;

[0037] 510 - Primary screening machine, 520 - Secondary screening machine, 530 - Finished product buffer silo, 540 - Finished product elevator, 550 - System discharge port, 560 - Under-screen powder silo, 570 - Automatic packaging line;

[0038] 600 - Dust collection unit; 610 - Exhaust fan; 620 - Dust collector;

[0039] 710 - Return material vibrating conveyor. Detailed Implementation

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.

[0042] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.

[0043] Example 1

[0044] Existing silicon metal powder production systems have significant limitations in terms of production efficiency, equipment utilization, and cost control when facing large-scale, continuous production. In addition, they suffer from low plant space utilization and low personnel efficiency.

[0045] To address the aforementioned problems in the prior art, this embodiment provides a metallic silicon powder production system for processing silicon blocks into metallic silicon powder. This system comprehensively improves production efficiency, plant space utilization, equipment utilization, and personnel efficiency in the metallic silicon powder production process. Please refer to... Figures 1-4 The silicon metal powder production system mainly includes: a feeding unit 100, a primary crushing unit 200, a conveying unit 300, a secondary crushing unit 400, a screening and collection unit, and a PLC control unit.

[0046] The feeding unit 100 is used to add silicon blocks into the processing and transport line of the production system, so that they can be processed by subsequent transport and processing units. For example... Figure 1 , Figure 2 As shown, the feeding unit 100 mainly includes a first vibrating feeder 120. The first vibrating feeder 120 is mainly composed of a vibrating frame, a vibrating motor, springs, a support base, and wear-resistant liners. When working, after the vibrating motor starts, the frame vibrates forcibly on the support springs, and the material slides and throws on the feed trough, thereby achieving the feeding purpose.

[0047] The primary crushing unit 200 is used for coarse crushing of silicon ingots, breaking them into silicon particles with a diameter of less than 15mm. In this embodiment, the primary crushing unit 200 mainly includes a primary crusher 210, which is a jaw crusher. Jaw crushers are stable in performance, have a low failure rate, a large crushing ratio, and a wide range of applications. They have no requirements on the size of the silicon material and can directly crush silicon ingots to produce silicon material of the required size. The primary crusher 210 mainly consists of a frame, a moving jaw, a fixed jaw, and a motor, and has a feed end and a discharge end. Alternatively, in one or more other embodiments, the primary crusher 210 may also be a hammer crusher or similar device.

[0048] The transport unit 300 is used to transport silicon particles with a diameter of less than 15mm obtained from the primary crushing unit 200 to the secondary crushing unit 400 for further crushing. The transport unit 300 mainly includes a coarse material elevator 310, a conveyor belt 320, and production line hoppers 330. The coarse material elevator 310 mainly consists of a motor, transmission mechanism, and lifting buckets, and is primarily used to lift the silicon particles. The lower end of the coarse material elevator 310 connects to the discharge end of the primary crusher 210 for loading silicon particles; the upper end of the coarse material elevator 310 connects to the conveyor belt 320 for unloading silicon particles. The conveyor belt 320 is positioned above the coarse material elevator 310 and is mainly used for horizontally transporting silicon particles; a discharge trolley 322 is also installed on the conveyor belt 320. Meanwhile, several production line hoppers 330 are located to the side of the conveyor belt 320 and distributed along the transport direction of the conveyor belt 320. The production line silo 330 is equipped with a second inlet 331 for feeding silicon granules and a second outlet 332 for discharging silicon granules; and the unloading trolley 322 on the conveyor belt 320 can unload the silicon granules on the conveyor belt 320 into several production line silos 330 respectively.

[0049] This embodiment includes multiple secondary crushing units 400 for further refining silicon particles to obtain silicon powder. The secondary crushing unit 400 mainly includes a second vibrating feeder 410, a secondary crusher 420, a double cyclone separator 440, and a cyclone collection bin 450. The second vibrating feeder 410 is located below the second discharge port 332 of the production line hopper 330. The secondary crusher 420 is a roller crusher, suitable for medium and fine crushing operations. It crushes materials by squeezing them with rotating rollers, resulting in a large crushing ratio and uniform output particle size. The secondary crusher 420 mainly consists of a frame, motor, and rollers. The feed end of the secondary crusher 420 is connected to the second vibrating feeder 410, receiving silicon particles with a diameter less than 15mm. The silicon particles are crushed into the desired silicon powder product within the secondary crusher 420. Meanwhile, a dual cyclone separator 440 is installed at the discharge end of the secondary crusher 420. The dual cyclone separator 440 screens the crushed silicon powder, separating it into upper dust-collecting powder and lower silicon powder. The upper part of the dual cyclone separator 440 is connected to the dust collection unit 600, and the dust-collecting powder is transported to the dust collection unit 600 through a pipeline. The dust-collecting powder collected by the dust collection unit 600 is manually bagged for recycling. The lower part of the dual cyclone separator 440 is connected to the cyclone collection bin 450, and the silicon powder is transported to the cyclone collection bin 450 through a pipeline. The inlet end of the cyclone collection bin 450 is connected to the dual cyclone separator 440; the outlet end of the cyclone collection bin 450 is connected to the screening and collection unit, used to transport the silicon powder to the screening and collection unit.

[0050] In this embodiment, multiple screening and collection units are provided in conjunction with the secondary crushing unit 400 to screen and collect the silicon powder produced by the secondary crushing unit 400. The screening and collection unit mainly includes a primary screening machine 510, a finished product buffer silo 530, and a system outlet 550. The primary screening machine 510 mainly consists of a base, a screening tank, a screen, and a vibration mechanism, and is equipped with a feed end and multiple discharge ends. The feed end of the primary screening machine 510 is connected to the discharge end of the cyclone collection silo 450, used to screen the silicon powder collected by the cyclone collection silo 450 to obtain qualified silicon powder, unqualified silicon powder, and undersize powder, which are output from different discharge ends of the primary screening machine 510. The feed end of the finished product buffer silo 530 is connected to the qualified silicon powder discharge end of the primary screening machine 510, used to collect and temporarily store the qualified silicon powder. Meanwhile, a finished product elevator 540 is installed between the system outlet 550 and the finished product buffer silo 530. The qualified silicon powder is transported to the system outlet 550 for external discharge and collection via the finished product elevator 540.

[0051] The PLC control unit is used to control the coordinated operation of other units in the silicon metal powder production system of this embodiment. The PLC control unit can automatically operate each piece of equipment, or it can use a one-button start / stop function to allow equipment to start and stop in an orderly manner according to a predetermined program. By constructing an intelligent production system through the PLC control unit, real-time monitoring of equipment operating status, intelligent analysis of production data, and predictive management of equipment maintenance are achieved, further improving production efficiency and reducing energy consumption and labor costs.

[0052] One specific working method of this embodiment is as follows:

[0053] First, standard silicon blocks (10-100mm) are transported to the feeding port by forklift and manually fed into the system. Then, the operator starts operating the system through the PLC control unit. The silicon blocks are fed into the primary crusher 210 by the first vibrating feeder 120 for coarse crushing. After coarse crushing, silicon particles smaller than 15mm are obtained and lifted to the conveyor belt 320 by the coarse material elevator 310. The silicon particles are then conveyed to the production line of each secondary crushing unit 400 for secondary crushing. The silicon powder after secondary crushing is screened by the double cyclone separator 440. The dust collected from the top enters the dust collection unit 600 and is manually bagged. The screened silicon powder is conveyed to the cyclone collection bin 450. After that, the silicon powder enters the primary screening machine 510 for processing. The qualified silicon powder enters the finished product buffer bin 530 and is then conveyed to the system outlet 550 for external discharge and collection.

[0054] In this embodiment, the silicon metal powder production system connects the primary crushing unit 200 and multiple secondary crushing units 400 via a transport unit 300. Primary coarse crushing is achieved through centralized feeding, followed by secondary crushing via belt conveyor. This increases single-line output from 5 tons / hour to over 6 tons / hour, significantly improving production efficiency. The original forklift and overhead crane feeding method is optimized to centralized belt conveyor, increasing personnel efficiency by approximately 30% while reducing cross-operation between forklifts, overhead cranes, and personnel, thus significantly lowering safety risks. This achieves a comprehensive improvement in production efficiency, plant space utilization, equipment utilization, and personnel efficiency, while reducing equipment investment. It solves the problem that existing silicon metal powder production systems have significant limitations in production efficiency, equipment utilization, plant space utilization, and personnel efficiency.

[0055] Meanwhile, existing silicon powder production systems also suffer from high factory noise during the crushing process. In this embodiment, centralized primary crushing is implemented, with both the feeding unit 100 and the primary crushing unit 200 located outside the factory, solving the factory noise problem caused by multiple single-line crushing and thus reducing occupational health hazards for relevant positions. Furthermore, the silicon blocks become smaller after coarse crushing, reducing wear and tear on the equipment during transportation.

[0056] Furthermore, the feeding unit 100 in this embodiment is also equipped with a raw material buffer silo 110, which is located above the first vibrating feeder 120. The raw material buffer silo 110 has a first inlet 111 for feeding silicon blocks and a first outlet 112 for discharging silicon blocks, with the first outlet 112 connected to the first vibrating feeder 120. The raw material buffer silo 110 can temporarily store materials, ensuring stable and uniform feeding to the subsequent primary crushing unit 200, and preventing overload or underload of the equipment due to uneven upstream material flow. Simultaneously, the raw material buffer silo 110 is also equipped with a baffle plate and a baffle valve. The baffle plate can block the first outlet 112, and the baffle valve can change the blocking area to limit and regulate the flow rate of silicon blocks discharged. In addition, the raw material buffer silo 110 and its associated material conveying method result in low vibration, low dust, and low noise during material conveying, effectively ensuring the occupational health of workers and reducing pollution to the working environment.

[0057] Furthermore, in this embodiment, a flow meter 333 is installed in the second inlet 331 of the production line silo 330. The flow meter 333 is electrically connected to the PLC control unit. The flow meter 333 feeds back the silicon particle flow rate of the second inlet 331 to the PLC control unit, thereby adjusting the unloading time and unloading speed of the unloading trolley 322 and controlling the feed amount of the production line silo 330.

[0058] Furthermore, the production line hopper 330 in this embodiment also adopts a buffer hopper structure design, which can better control the transportation speed of silicon particles on different secondary crushing production lines.

[0059] Furthermore, the screening and collection unit in this embodiment is also equipped with an undersize powder bin 560. The feed end of the undersize powder bin 560 is connected to the discharge end of the undersize powder from the primary screening machine 510, for collecting and temporarily storing the undersize powder. Furthermore, the dust collection unit 600 in this embodiment includes an induced draft fan 610, a dust collector 620, and a dust collection pipe. The inlet of the dust collection pipe is connected to the dust removal powder outlet of the double cyclone separator 440; and the dust collection unit 600 is also connected to a fully sealed dust extraction system for the silicon powder production line, achieving dust-free operation and maintenance. The dust collected by the dust collection unit 600 is manually loaded into ton bags for recycling. In addition, the undersize powder and dust removal powder from the undersize powder bin 560 are bagged and manually transported by forklift to outside the boundary area.

[0060] Preferably, in this embodiment, the frequency converter system of the crusher adopts a heavy-duty series frequency converter. The frequency of each frequency-converted device can be set through the control panel of the PLC control unit. The operating fault status of all devices is centrally displayed and recorded on the display screen of the PLC control unit to adapt to the system load requirements. Simultaneously, an operable touch screen is placed on the production line where each unit is located, allowing operation of all devices via the touch screen. Furthermore, emergency stop devices are provided near each crusher and elevator. In addition, the silicon powder production system of this embodiment also includes spark detectors, air pressure testers, and other detectors on the production line where each unit is located. The PLC control unit is electrically connected to these detectors and has an interlocking program for system control based on the test results.

[0061] Example 2

[0062] Based on the above embodiments, a second embodiment is provided below as a further improvement.

[0063] Please see Figure 5 The feeding unit 100, primary crushing unit 200, transportation unit 300 and dust collection unit 600 in the second embodiment are roughly the same as those in the first embodiment. The improvements in this embodiment are mainly in the secondary crushing unit 400 and the screening and collection unit.

[0064] like Figure 5As shown in the illustration, in this embodiment, the secondary crushing unit 400 is mainly equipped with a tertiary crusher 430; the screening and collection unit is mainly equipped with a secondary screening machine 520. A silicon powder elevator 460 is installed between the tertiary crusher 430 and the primary screening machine 510 of the screening and collection unit. One end of the silicon powder elevator 460 is connected to the unqualified silicon powder discharge end of the primary screening machine 510. The silicon powder with unqualified particle size screened by the primary screening machine 510 is fed into the tertiary crusher 430 for tertiary crushing via the silicon powder elevator 460. The discharge end of the tertiary crusher 430 is connected to the secondary screening machine 520. The secondary screening machine 520 screens the silicon powder after tertiary crushing to obtain qualified silicon powder, unqualified silicon powder, and undersize powder, which are output from different discharge ends of the secondary screening machine 520. The discharge end of the qualified silicon powder is connected to the finished product buffer silo 530; the discharge end of the undersize powder is connected to the undersize powder silo 560.

[0065] In this embodiment, the silicon metal powder production system further processes the unqualified silicon powder obtained by the primary screening machine 510 by setting up a three-stage crusher 430 and a secondary screening machine 520, thereby improving the utilization rate of raw materials and reducing waste.

[0066] In addition, the screening and collection unit in this embodiment replaces the finished product elevator 540 and the system discharge port 550 with an automatic packaging line 570. The automatic packaging line 570 is directly connected to the finished product buffer silo 530, which automatically packages and transports qualified silicon powder. The packaged products are then unloaded manually from the automatic packaging line 570.

[0067] Example 3

[0068] Based on the above embodiments, a third embodiment is provided below as a further improvement.

[0069] Please see Figure 6 In the third embodiment, the feeding unit 100, primary crushing unit 200, transportation unit 300, secondary crushing unit 400, screening and collection unit and dust collection unit 600 are roughly the same as in the first embodiment. The main improvement in this embodiment is the addition of a return material unit.

[0070] The recycling unit is used to recover and reuse substandard silicon powder. For example... Figure 6 As shown in the figure, in this embodiment, the return material unit mainly includes a return material vibrating conveyor 710, which is mainly composed of a vibrator, a conveying trough and a balance base frame. One end of the return material vibrating conveyor 710 is connected to the unqualified silicon powder discharge end of the primary screening machine 510; the other end of the return material vibrating conveyor 710 is connected to the conveyor belt 320 of the transport unit 300.

[0071] In this embodiment, the silicon metal powder production system incorporates a return unit to reprocess the substandard silicon powder obtained from the primary screening machine 510, thereby improving the utilization rate of raw materials and reducing waste.

[0072] Example 4

[0073] Based on the above embodiments, a fourth embodiment is provided below as a further improvement.

[0074] Please see Figure 7 The feeding unit 100, primary crushing unit 200, transportation unit 300, secondary crushing unit 400 and dust collection unit 600 in the fourth embodiment are largely the same as those in the second embodiment. The main improvement in this embodiment is the addition of a return material unit and an improvement to the screening and collection unit.

[0075] like Figure 7 As shown, the screening and collection unit in this embodiment is equipped with both an automatic packaging line 570 and the finished product elevator 540 and system discharge port 550 from the first embodiment. In use, the finished product elevator 540 and system discharge port 550 or the automatic packaging line can be used to deliver qualified silicon powder. The two production lines can produce silicon powder for different purposes, including silicon powder used directly as a product and silicon powder requiring further processing.

[0076] Meanwhile, in this embodiment, the recycling unit is used to recover and reuse substandard silicon powder. The recycling unit mainly includes a recycling vibrating conveyor 710, one end of which is connected to the substandard silicon powder discharge end of the secondary screening machine 520; the other end of the recycling vibrating conveyor 710 is connected to the conveyor belt 320 of the transport unit 300. In this embodiment, the silicon powder production system, by setting up the recycling unit, re-feeds the substandard silicon powder obtained from the secondary screening machine 520 back into the system for processing, improving the utilization rate of raw materials and reducing waste.

[0077] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A silicon metal powder production system, characterized in that, Include: The feeding unit (100) is used to feed silicon material; The primary crushing unit (200) is connected to the feeding unit (100) and is used to process silicon material to produce silicon particles; The secondary crushing unit (400) is connected to the primary crushing unit (200) via a transport unit (300); the secondary crushing unit (400) is used to process silicon particles to produce silicon powder. The screening and collection unit is connected to the secondary crushing unit (400) and is used to screen silicon powder to produce qualified silicon powder. The transport unit (300) is capable of connecting the primary crushing unit (200) and multiple secondary crushing units (400).

2. The silicon metal powder production system as described in claim 1, characterized in that, The feeding unit (100) has at least a raw material buffer bin (110) and a first vibrating feeder (120); the first discharge port (112) of the raw material buffer bin (110) is connected to the first vibrating feeder (120); and the first vibrating feeder (120) is connected to the primary crushing unit (200).

3. The silicon metal powder production system as described in claim 1, characterized in that, The transport unit (300) has at least a transport belt (320); a coarse material elevator (310) is provided between the transport belt (320) and the primary crushing unit (200); and a number of production line hoppers (330) are provided on the side of the transport belt (320), and a discharge trolley (322) is provided on the transport belt (320); the discharge trolley (322) can unload the silicon particles on the transport belt (320) into the production line hopper (330).

4. The silicon metal powder production system as described in claim 3, characterized in that, The secondary crushing unit (400) has at least a second vibrating feeder (410) and a secondary crusher (420); the second vibrating feeder (410) is connected to the discharge end of the production line hopper (330); the feed end of the secondary crusher (420) is connected to the second vibrating feeder (410); and the screening and collecting unit has at least a primary screening machine (510), the feed end of the primary screening machine (510) is connected to the discharge end of the secondary crusher (420).

5. The silicon metal powder production system as described in claim 4, characterized in that, The secondary crushing unit (400) further includes at least a double cyclone separator (440) and a cyclone collection bin (450); the double cyclone separator (440) is connected to the discharge end of the secondary crusher (420), and the dust outlet of the double cyclone separator (440) is connected to the dust collection unit (600); the silicon powder outlet of the double cyclone separator (440) is connected to the cyclone collection bin (450); and the discharge end of the cyclone collection bin (450) is connected to the screening and collection unit.

6. The silicon metal powder production system as described in claim 4, characterized in that, The secondary crushing unit (400) also has at least a tertiary crusher (430), the feed end of which is connected to the unqualified silica powder discharge end of the primary screening machine (510); and the screening and collecting unit also has at least a secondary screening machine (520), the feed end of which is connected to the discharge end of the tertiary crusher (430).

7. The silicon metal powder production system as described in claim 6, characterized in that, A return unit is provided between the unqualified silicon powder discharge end of the secondary screening machine (520) and the transport unit (300).

8. The silicon metal powder production system as described in claim 1, characterized in that, The qualified silicon powder discharge end of the screening machine of the screening and collection unit is connected to the finished product buffer silo (530), and the undersize powder discharge end of the screening machine of the screening and collection unit is connected to the undersize powder silo (560).

9. The silicon metal powder production system as described in claim 8, characterized in that, The discharge end of the finished product buffer silo (530) is connected to an automatic packaging line (570) and / or a finished product elevator (540); the finished product elevator (540) is connected to a system discharge port (550).

10. The metallic silicon powder production system according to any one of claims 1-9, characterized in that, Also includes: The PLC control unit is used to control the operation of the feeding unit (100), the primary crushing unit (200), the secondary crushing unit (400), and the screening and collection unit.

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