Dry granulation method and device for silicon-containing powder or silicon-containing fine particles

Abstract

The invention discloses a dry granulation method and device for silicon-containing powder or silicon-containing fine particles, and relates to the related field of powder granulation, and the method comprises the following steps: collecting the silicon-containing powder or silicon-containing fine particles into a storage device to obtain a silicon-containing material; the silicon-containing material is quantitatively conveyed into the lifter through the regulator; the lifter lifts the silicon-containing material from the first height to a second height; quantitatively conveying the silicon-containing material at the second height into a material pressing device through a feeder; the material pressing device is used for carrying out dry-method pressing granulation on the silicon-containing material and outputting metal silicon hard particles; the metal silicon hard particles are screened through the screening device, finished silicon hard particles are output, and screened dust is conveyed to the bottom of the lifter to be recycled. The technical problems of resource waste and value reduction loss existing in existing silicon-containing powder or fine particle recovery treatment are solved, and the technical effects of achieving maximum utilization of resources and reducing the value reduction loss are achieved.

Description

Technical Field

[0001] The present application relates to the field of powder granulation, and in particular to a dry granulation method and device for silicon-containing powder or silicon-containing fine particles. Background Art

[0002] In the silicon industry chain, the production process of metallic silicon is often accompanied by crushing or cutting processes, which produce a large amount of metallic silicon powder as a by-product. These silicon-containing powders or fine particles are considered to be a low-value by-product due to their fine particle size and high content of impurity elements. Especially for industrial silicon, a product with a brittle nature, about 2-4% of fine particles below 0.25 mm and dust powder will be produced during the product finishing process. These fine particles and dust have high impurity content and low specific gravity, so it is technically difficult to directly add them to high-temperature silicon melt for remelting and recovery. Due to the difficulty of recycling, these by-products can only be sold at low prices, resulting in waste of resources and impairment losses.

[0003] In the current related technologies, the recycling and processing of silicon-containing powder or fine particles has technical problems such as resource waste and impairment loss. Summary of the invention

[0004] The present application provides a dry granulation method and device for silicon-containing powder or silicon-containing fine particles, which collects silicon-containing powder or silicon-containing fine particles into a storage device, quantitatively conveys the silicon-containing material to a lifter through a regulator, the lifter lifts the silicon-containing material from a first height to a second height, quantitatively conveys the silicon-containing material at the second height to a press through a feeder, the presser performs dry pressing on the silicon-containing material to granulate, outputs metallic silicon hard particles, screens the metallic silicon hard particles through a screener, outputs finished silicon hard particles, and conveys the screened dust to the bottom of the lifter for recycling, etc., so as to convert the silicon-containing powder or fine particles originally low-value by-products into valuable metallic silicon hard particles, thereby achieving the technical effect of maximizing the utilization of resources and reducing impairment losses.

[0005] The present application provides a dry granulation method for silicon-containing powder or silicon-containing fine particles, comprising:

[0006] Silicon-containing powder or silicon-containing fine particles are collected in a storage device to obtain silicon-containing material; the silicon-containing material is quantitatively transported to a lifter through a regulator; the lifter lifts the silicon-containing material from a first height to a second height; the silicon-containing material at the second height is quantitatively transported to a press through a feeder; the presser performs dry pressing on the silicon-containing material to granulate, and outputs metallic silicon hard particles; the metallic silicon hard particles are screened through a screener, and finished silicon hard particles are output, and the screened dust is transported to the bottom of the lifter for recycling.

[0007] In a possible implementation, the pressurizer performs dry pressing on the silicon-containing material to granulate, outputs metallic silicon hard granules, and performs the following processing:

[0008] The material press comprises a pre-pressing area and a main pressing area, wherein the material is pressed based on a first group of pressing rollers in the pre-pressing area, and the material is pressed based on a second group of pressing rollers in the main pressing area, wherein the second group of pressing rollers is arranged behind the first group of pressing rollers; in the pre-pressing area, the first group of pressing rollers uses the pre-pressing pressure to perform preliminary compaction on the silicon-containing material to obtain a dense silicon-containing material; in the main pressing area, the second group of pressing rollers uses the main pressing pressure to perform dry compaction on the dense silicon-containing material to granulate, and output metallic silicon hard particles.

[0009] In a possible implementation, after outputting the metal silicon hard particles, the following processing is performed:

[0010] A main pressure control parameter-silicon hard particle specification prediction model is established, wherein the main pressure control parameters include rotational speed, frequency and main pressure, and the silicon hard particle specifications include silicon hard particle strength, silicon hard particle hardness and silicon hard particle density; if any specification parameter of the output metal silicon hard particles does not meet the preset expectations, the rotational speed, frequency and main pressure are adaptively adjusted according to the main pressure control parameter-silicon hard particle specification prediction model.

[0011] In a possible implementation, the main pressure control parameter-silicon hard particle specification prediction model is established, and the following processing is performed:

[0012] Collect experimental data, the experimental data including experimental silicon hard particle strength, experimental silicon hard particle hardness and experimental silicon hard particle density of silicon hard particles produced under different experimental rotational speeds, experimental frequencies and experimental main pressure settings; use the experimental rotational speed, experimental frequency and experimental main pressure as input data, and the experimental silicon hard particle strength, experimental silicon hard particle hardness and experimental silicon hard particle density as output data, use supervised learning to train the neural network, use mean square error as the loss function, optimize the network weights through the back propagation algorithm, and after the training is completed, obtain the main pressure control parameter-silicon hard particle specification prediction model.

[0013] In a possible implementation, the silicon-containing material is quantitatively transported to the lifter through a regulator, and the following processing is performed:

[0014] The real-time flow rate and real-time density of the silicon-containing material are monitored by the sensor at the regulator outlet; it is determined whether the real-time flow rate and real-time density simultaneously meet the target flow rate and target density. If any parameter does not meet the target value, the opening of the regulator is PID controlled to ensure that the silicon-containing material is quantitatively transported to the lifter.

[0015] The present application also provides a dry granulation device for silicon-containing powder or silicon-containing fine particles, comprising:

[0016] A storage device is used to store silicon-containing materials, wherein the silicon-containing materials include silicon-containing powder or silicon-containing fine particles; a regulator is connected to the outlet of the storage device and is used to quantitatively convey the silicon-containing materials to the bottom of the lifter; a lifter is connected to the outlet of the regulator and is used to lift the silicon-containing materials from a first height at the bottom to a second height at the top; a feeder is connected to the top of the lifter and is used to quantitatively convey the silicon-containing materials to a press; a presser is connected to the outlet of the feeder and is used to dry-press the silicon-containing materials into granules and output metallic silicon granules; a sifter is connected to the outlet of the presser and is used to sieve the metallic silicon granules, and the sieved upper layer of finished silicon granules are output through the first outlet, and the lower layer of dust enters the bottom of the lifter through the second outlet for recycling.

[0017] In a possible implementation, the screener is a double-layer vibrating screen, and the aperture of the upper screen is larger than the aperture of the lower screen.

[0018] In a possible implementation, the regulator includes a butterfly valve, a star-shaped feed valve, a single-seat ball valve, or a double-seat ball valve.

[0019] The present application proposes a dry granulation method and device for silicon-containing powder or silicon-containing fine particles. First, the silicon-containing powder or silicon-containing fine particles are collected in a storage device to obtain a silicon-containing material. Then, the silicon-containing material is quantitatively transported to a lifter through a regulator. The lifter lifts the silicon-containing material from a first height to a second height. Then, the silicon-containing material at the second height is quantitatively transported to a press through a feeder. The press performs dry pressing on the silicon-containing material to granulate the silicon-containing material and outputs metallic silicon hard particles. Finally, the metallic silicon hard particles are screened through a screener to output finished silicon hard particles. The screened dust is transported to the bottom of the lifter for recycling, thereby achieving the technical effect of maximizing the utilization of resources and reducing impairment losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the accompanying drawings of the embodiment of the present invention will be briefly introduced below. A flow chart is used in the present application to illustrate the operations performed by the device according to the embodiment of the present application. It should be understood that the previous or following operations are not necessarily performed accurately in order. On the contrary, various steps can be processed in reverse order or simultaneously as needed. At the same time, other operations can also be added to these processes, or one or more operations can be removed from these processes.

[0021] Figure 1 A schematic flow chart of a dry granulation method for silicon-containing powder or silicon-containing fine particles provided in an embodiment of the present application.

[0022] Figure 2A schematic structural diagram of a dry granulation device for silicon-containing powder or silicon-containing fine particles provided in an embodiment of the present application.

[0023] Description of the reference numerals: storage 1, regulator 2, elevator 3, feeder 4, press 5, screener 6. DETAILED DESCRIPTION

[0024] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0025] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0026] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict, and the terms "first\second" involved are merely to distinguish similar objects and do not represent a specific ordering of objects. The terms "including" and "having" and any variations are intended to cover non-exclusive inclusions, for example, a process, method, device, product, or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products, or devices. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of this application. The terms used herein are for the purpose of describing the embodiments of the present application only.

[0027] The present application embodiment provides a dry granulation method for silicon-containing powder or silicon-containing fine particles, such as Figure 1 As shown, the method includes:

[0028] Step S100, collecting silicon-containing powder or silicon-containing fine particles into a storage device to obtain silicon-containing materials. Specifically, silicon-containing powder or silicon-containing fine particles are obtained from the production source, and the silicon-containing powder or fine particles are sent to the storage device through a conveying device (such as a conveyor belt, a pipeline, etc.). The storage device is a container or device for temporarily storing silicon-containing powder or fine particles, and has sealing properties to prevent the material from being damp or contaminated.

[0029] Step S200, quantitatively conveying the silicon-containing material to the elevator through the regulator. Specifically, the regulator is a device for controlling the material conveying amount, and has metering and regulating functions. According to the preset conveying amount, the conveying speed of the silicon-containing material is controlled. After the silicon-containing material passes through the regulator, it is quantitatively conveyed into the elevator. The elevator is a device for lifting materials from a low place to a high place, such as a bucket elevator, a screw elevator, etc.

[0030] In step S300, the lifter lifts the silicon-containing material from a first height to a second height. Specifically, the lifter is started to lift the silicon-containing material from a first height (lower position) to a second height (higher position).

[0031] Step S400, quantitatively conveying the silicon-containing material at the second height to the press through the feeder. Specifically, after the silicon-containing material is lifted to the second height, the feeder quantitatively conveys the silicon-containing material into the press according to a preset conveying amount. The feeder has metering and conveying functions, and the press is a device for compressing and granulating the material, such as a tablet press, a roller press, etc.

[0032] Step S500, the pressurizer performs dry pressing and granulation on the silicon-containing material to output metal silicon hard particles. Specifically, the pressurizer compresses and granulates the silicon-containing material. During the compression process, the silicon-containing material is compressed into metal silicon hard particles with a certain shape and size. After the compression is completed, the metal silicon hard particles are discharged from the pressurizer. The dry pressing and granulation refers to a method of granulating the material by physical force (compression, extrusion, etc.) under anhydrous conditions.

[0033] Step S600, the metal silicon granules are screened by a screener, the finished silicon granules are output, and the screened dust is transported to the bottom of the lifter for recycling. Specifically, after the metal silicon granules enter the screener, they are screened into particles of different sizes. The finished silicon granules that meet the requirements are collected and output. The screened dust (overfine or unqualified particles) is transported to the bottom of the lifter and re-enters the granulation process for recycling. The embodiment of the present application adopts technical means such as collecting silicon-containing powder or silicon-containing fine particles into a storage device, quantitatively conveying the silicon-containing material to a lifter through a regulator, the lifter lifts the silicon-containing material from a first height to a second height, quantitatively conveying the silicon-containing material at the second height to a press through a feeder, the presser dry-presses the silicon-containing material into granules, outputs metallic silicon hard particles, screens the metallic silicon hard particles through a screener, outputs finished silicon hard particles, and conveys the screened dust to the bottom of the lifter for recycling, etc., to convert the silicon-containing powder or fine particles that were originally low-value by-products into valuable metallic silicon hard particles, thereby achieving the technical effect of maximizing the utilization of resources and reducing impairment losses.

[0034] In a possible implementation, the press performs dry pressing and granulation on the silicon-containing material, and outputs metallic silicon hard particles. Step S500 further includes step S510, wherein the press includes a pre-pressing area and a main pressing area, in which the material is pressed based on a first group of pressing rollers, and in the main pressing area, the material is pressed based on a second group of pressing rollers, wherein the second group of pressing rollers is arranged after the first group of pressing rollers. Specifically, the press is designed to include two independent areas: a pre-pressing area and a main pressing area. In the pre-pressing area, a group of pressing rollers (a first group of pressing rollers) is installed, which is responsible for preliminary compaction of the silicon-containing material. In the main pressing area, another group of pressing rollers (a second group of pressing rollers) is installed, which is responsible for further compaction and granulation of the silicon-containing material. Among them, the pressing roller is a cylindrical device for compacting the material, which is made of a hard material and has a certain surface roughness to increase friction. Step S520, in the pre-pressing area, the first group of pressing rollers uses a pre-pressing pressure to perform preliminary compaction on the silicon-containing material to obtain a compact silicon-containing material. Specifically, after the silicon-containing material is fed into the pre-pressing area, the first group of rollers starts to rotate and performs preliminary compaction on the silicon-containing material with a preset pre-pressing pressure. After preliminary compaction, the silicon-containing material becomes more compact to form a compact silicon-containing material. Step S530, in the main pressing area, the second group of rollers uses the main pressing pressure to dry-press and granulate the compact silicon-containing material, and outputs metal silicon hard particles. Specifically, the compact silicon-containing material is fed from the pre-pressing area to the main pressing area, and the second group of rollers starts to rotate and performs further compaction and granulation on the compact silicon-containing material with a preset main pressing pressure. After compaction and granulation, the compact silicon-containing material is converted into metal silicon hard particles, and the metal silicon hard particles are discharged from the press. This implementation method reduces the energy consumption and time in the subsequent granulation process by preliminarily compacting the silicon-containing material, and the compact silicon-containing material is more easily further compacted and granulated, thereby improving the overall granulation efficiency.

[0035] In a possible implementation, after the output of the metal silicon hard particles, step S500 further includes step S540, establishing a main pressure control parameter-silicon hard particle specification prediction model, wherein the main pressure control parameters include rotation speed, frequency and main pressure pressure, and the silicon hard particle specifications include silicon hard particle strength, silicon hard particle hardness and silicon hard particle density. Specifically, collect experimental data, and use machine learning methods to construct a prediction model between the main pressure control parameters and the silicon hard particle specifications. This model can predict the specification parameters of the silicon hard particles based on the given main pressure control parameters. Among them, the main pressure control parameters refer to the key parameters in the main pressure process that affect the specifications of the metal silicon hard particles, including rotation speed, frequency and main pressure pressure. The silicon hard particle specifications refer to the physical properties of the metal silicon hard particles, including the strength of the silicon hard particles (the ability to resist external force damage), the hardness of the silicon hard particles (the ability of the surface to resist scratches or pressing) and the density of the silicon hard particles (the mass per unit volume). Step S550, if any of the specification parameters in the output metal silicon hard particles do not meet the preset expectations, the rotation speed, frequency and main pressure pressure are adaptively adjusted according to the main pressure control parameter-silicon hard particle specification prediction model. Specifically, the output metal silicon hard particles are subjected to specification detection, including the measurement of silicon hard particle strength, hardness and density. The detected specification parameters are compared with the preset expected specifications. If any specification parameter does not meet the preset expectations, the main pressure control parameter-silicon hard particle specification prediction model is used to predict the adjusted main pressure control parameters. According to the prediction results of the model, the rotation speed, frequency and main pressure are adaptively adjusted. The metal silicon hard particles are re-produced using the adjusted parameters and the specification detection is performed again. If the specifications still do not meet expectations, the above steps are repeated until a parameter combination that meets the requirements is found. This implementation method reduces the production of unqualified products and improves product quality by adaptively adjusting the main pressure control parameters to quickly find a parameter combination that meets the silicon hard particle specification requirements.

[0036] In a possible implementation, the main pressure control parameter-silicon hard particle specification prediction model is established, and step S540 further includes step S541, collecting experimental data, and the experimental data includes the experimental silicon hard particle strength, experimental silicon hard particle hardness and experimental silicon hard particle density of the silicon hard particles produced under different experimental rotation speeds, experimental frequencies and experimental main pressure settings. Specifically, experiments are conducted under different experimental rotation speeds, experimental frequencies and experimental main pressure settings, and silicon hard particles are produced according to the set experimental conditions, and the strength, hardness and density of the produced silicon hard particles are measured. The experimental conditions (rotation speed, frequency, main pressure) and silicon hard particle specifications (strength, hardness, density) are recorded as input and output data for model training. Step S542, using the experimental rotation speed, experimental frequency and experimental main pressure as input data, and the experimental silicon hard particle strength, experimental silicon hard particle hardness and experimental silicon hard particle density as output data, using supervised learning to train the neural network, using mean square error as the loss function, optimizing the network weights through the back propagation algorithm, and after the training is completed, the main pressure control parameter-silicon hard particle specification prediction model is obtained. Specifically, the experimental data collected in step S541 are divided into input data (rotation speed, frequency, main pressure) and output data (silicon hard particle strength, hardness, density). A convolutional neural network is used to establish a mapping relationship between input and output, and the mean square error is used as a loss function to measure the difference between the model prediction value and the actual value. The supervised learning method is adopted to optimize the weight of the neural network through the back propagation algorithm to minimize the loss function. After the training is completed, the model is saved. This implementation method improves the accuracy and reliability of the model by collecting experimental data and establishing a model based on actual production conditions.

[0037] In a possible implementation, the silicon-containing material is quantitatively transported to the lifter through the regulator, and step S200 further includes step S210, monitoring the real-time flow rate and real-time density of the silicon-containing material through the sensor at the outlet of the regulator. Specifically, a flow sensor and a density sensor are installed at the outlet of the regulator. The flow sensor is used to measure the flow rate of the silicon-containing material when it passes through the regulator, and the density sensor is used to measure the density of the material. Step S220, determine whether the real-time flow rate and real-time density meet the target flow rate and target density at the same time. If any parameter does not meet the target value, the opening of the regulator is PID controlled to enable the silicon-containing material to be quantitatively transported to the lifter. Specifically, the target flow rate and target density of the silicon-containing material are set in the control system according to production requirements and quality requirements. The real-time flow rate and real-time density are compared with the target flow rate and target density to determine whether they meet the target value at the same time. If any parameter does not meet the target value, the PID (proportional-integral-differential) control algorithm is started to adjust the opening of the regulator. PID control generates control signals by calculating the current error (difference between target value and actual value), the integral of the error and the differential of the error, thereby achieving precise control of the regulator opening. As the regulator opening is adjusted, the flow rate and density of the silicon-containing material gradually approach the target value, thereby achieving the purpose of quantitative delivery to the lifter. This implementation method ensures the accuracy and stability of delivery by real-time monitoring of the flow rate and density of the silicon-containing material, timely detecting and correcting deviations.

[0038] In the above, refer to Figure 1 A dry granulation method for silicon-containing powder or silicon-containing fine particles according to an embodiment of the present invention is described in detail. Figure 2 A dry granulation device for silicon-containing powder or silicon-containing fine particles according to an embodiment of the present invention is described.

[0039] A dry granulation device for silicon-containing powder or silicon-containing fine particles according to an embodiment of the present invention is used to solve the technical problems of resource waste and impairment losses in the existing recycling and treatment of silicon-containing powder or fine particles, thereby achieving the technical effect of maximizing resource utilization and reducing impairment losses.

[0040] A dry granulation device for silicon-containing powder or silicon-containing fine particles comprises: a storage 1 for storing silicon-containing materials, wherein the silicon-containing materials include silicon-containing powder or silicon-containing fine particles; a regulator 2, connected to the outlet of the storage 1, and used for quantitatively conveying the silicon-containing materials to the bottom of a lifter; a lifter 3, connected to the outlet of the regulator 2, and used for lifting the silicon-containing materials from a first height at the bottom to a second height at the top; a feeder 4, connected to the top of the lifter 3, and used for quantitatively conveying the silicon-containing materials to a press; a press 5, connected to the outlet of the feeder 4, and used for dry-pressing the silicon-containing materials into granules and outputting metallic silicon hard particles; a sifter 6, connected to the outlet of the press 5, and used for sieving the metallic silicon hard particles, wherein the sieved upper layer of finished silicon hard particles is output through the first outlet, and the lower layer of dust enters the bottom of the lifter 3 through the second outlet for recycling.

[0041] In a possible implementation, the screener 6 is a double-layer vibrating screen, and the aperture of the upper screen is larger than the aperture of the lower screen. Specifically, the aperture of the upper screen is designed to be relatively large, and is mainly used to screen out larger metallic silicon hard particles, which have met the production requirements and can be directly output as finished products. The aperture of the lower screen is smaller, and is used to further screen smaller particles and dust that have not been intercepted by the upper screen. These smaller particles and dust have failed to form ideal hard particles due to various reasons (such as incomplete compression, material characteristics, etc.), and therefore need to be processed through recycling. The double-layer vibrating screen generates vibrations through a built-in vibration device, causing the material to jump and roll on the screen, thereby achieving effective screening. Through the combination of vibration and double-layer screens, efficient screening effects are achieved, production efficiency is improved, material waste is reduced, and the quality consistency of the final product is ensured.

[0042] In a possible implementation, the regulator 2 includes a butterfly valve, a star-shaped feed valve, a single-seat ball valve, and a double-seat ball valve. Specifically, the butterfly valve is used for regulating materials with a larger flow rate. Due to its simple structure and fast opening and closing speed, it is suitable for occasions where frequent flow adjustment is required. The star-shaped feed valve is suitable for processing powdered or granular materials due to its compact structure and good sealing. The single-seat ball valve is used for regulation occasions that require higher sealing performance and smaller flow. Due to its compact structure and easy operation, it is suitable for processing high-pressure or corrosive materials. The double-seat ball valve is used for occasions that require a larger flow adjustment range and higher sealing performance. Due to its complex structure and high adjustment accuracy, it is suitable for processing materials with higher flow control requirements. Different valves have different characteristics and application scenarios. By selecting the appropriate valve type and combination, the flow rate of silicon-containing materials can be accurately controlled to ensure that the materials can be stably and quantitatively transported to the lifter 3.

[0043] A dry granulation device for silicon-containing powder or silicon-containing fine particles provided in an embodiment of the present invention can execute a dry granulation method for silicon-containing powder or silicon-containing fine particles provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0044] The above specific implementation manner does not constitute a limitation to the protection scope of the present application. It should be understood by those skilled in the art that various modifications, combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application. In some cases, the actions or steps recorded in the present application can be performed in an order different from that in the embodiment and can still achieve the desired results. In addition, the process depicted in the accompanying drawings does not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Claims

1. A dry granulation method for silicon-containing powder or silicon-containing fine particles, characterized in that: The method comprises: collecting silicon-containing powder or silicon-containing fine particles into a storage container to obtain silicon-containing material; The silicon-containing material is quantitatively transported to the lifter through a regulator; The lifter lifts the silicon-containing material from a first height to a second height; The silicon-containing material at the second height is quantitatively conveyed to the pressing device by the feeder; The press performs dry pressing on the silicon-containing material to granulate, and outputs metallic silicon hard granules; The metallic silicon granules are screened by a screener to output finished silicon granules, and the screened dust is transported to the bottom of the lifter for recycling.

2. A dry granulation method for silicon-containing powder or silicon-containing fine particles according to claim 1, characterized in that: The pressurizer performs dry pressing on the silicon-containing material to granulate and outputs metallic silicon hard particles, including: The material press comprises a pre-pressing area and a main pressing area, in which the material is pressed based on a first group of pressing rollers in the pre-pressing area, and in which the material is pressed based on a second group of pressing rollers in the main pressing area, wherein the second group of pressing rollers is arranged behind the first group of pressing rollers; In the pre-pressing area, the first group of pressing rollers preliminarily compacts the silicon-containing material using pre-pressing pressure to obtain a compact silicon-containing material; In the main pressing area, the second group of pressing rollers uses the main pressing pressure to dry-press the compact silicon-containing material into granules, and outputs metallic silicon hard granules.

3. A dry granulation method for silicon-containing powder or silicon-containing fine particles according to claim 2, characterized in that: After the outputting of the metal silicon hard particles, the method further comprises: Establishing a main pressure control parameter-silicon hard particle specification prediction model, wherein the main pressure control parameters include rotation speed, frequency and main pressure, and the silicon hard particle specifications include silicon hard particle strength, silicon hard particle hardness and silicon hard particle density; If any specification parameter of the output metal silicon hard particles does not meet the preset expectations, the rotation speed, frequency and main pressure are adaptively adjusted according to the main pressure control parameter-silicon hard particle specification prediction model.

4. A dry granulation method for silicon-containing powder or silicon-containing fine particles according to claim 3, characterized in that: The method of establishing a main pressure control parameter-silicon hard particle specification prediction model includes: Collecting experimental data, the experimental data including experimental silicon hard particle strength, experimental silicon hard particle hardness and experimental silicon hard particle density of silicon hard particles produced under different experimental rotation speeds, experimental frequencies and experimental main pressure settings; The experimental rotational speed, experimental frequency and experimental main pressure are used as input data, and the experimental silicon hard particle strength, experimental silicon hard particle hardness and experimental silicon hard particle density are used as output data. The neural network is trained by supervised learning, and the mean square error is used as the loss function. The network weights are optimized by the back propagation algorithm. After the training is completed, the main pressure control parameter-silicon hard particle specification prediction model is obtained.

5. The dry granulation method of silicon-containing powder or silicon-containing fine particles according to claim 1, characterized in that: The method of quantitatively conveying the silicon-containing material to the lifter through the regulator comprises: The real-time flow rate and real-time density of the silicon-containing material are monitored by the sensor at the regulator outlet; It is determined whether the real-time flow rate and real-time density simultaneously meet the target flow rate and target density. If any parameter does not meet the target value, the opening of the regulator is PID controlled to allow the silicon-containing material to be quantitatively transported to the lifter.

6. A dry granulation device for silicon-containing powder or silicon-containing fine particles, characterized in that: The device is used to implement the dry granulation method of a silicon-containing powder or silicon-containing fine particles according to any one of claims 1 to 5, and the device comprises: A storage device for storing silicon-containing materials, wherein the silicon-containing materials include silicon-containing powder or silicon-containing fine particles; A regulator connected to the outlet of the storage device and used for quantitatively conveying the silicon-containing material to the bottom of the lifter; A lifter connected to the outlet of the regulator, used to lift the silicon-containing material from a first height at the bottom to a second height at the top; A feeder connected to the top of the lifter and used for quantitatively conveying the silicon-containing material to the press; A pressurizer, connected to the outlet of the feeder, for dry-pressing the silicon-containing material into granules and outputting metallic silicon granules; The screener is connected to the outlet of the press and is used to screen the metallic silicon hard particles. The screened upper layer of finished silicon hard particles is output through the first outlet, and the lower layer of dust enters the bottom of the lifter through the second outlet for recycling.

7. A dry granulation device for silicon-containing powder or silicon-containing fine particles as claimed in claim 6, characterized in that: The sifter is a double-layer vibrating screen, and the aperture of the upper screen is larger than the aperture of the lower screen.

8. A dry granulation device for silicon-containing powder or silicon-containing fine particles as claimed in claim 6, characterized in that: The regulator includes a butterfly valve, a star-shaped feed valve, a single-seat spherical valve, and a double-seat spherical valve.

Images