WO2018103707A1 - Adjustable screening system for silicon residues - Google Patents

Abstract

An adjustable screening system for silicon residues, comprising two sealing plates (1) fixedly connected by means of a plurality of equal-height blocks (2) to form a frame with openings in the periphery. A flat plate (3) is provided on the opening of the bottom of the frame; one end of the flat plate (3) is connected to an arc-shaped plate (4); a blast nozzle (5) is further comprised and is connected to a high pressure gas storage tank (8) by means of a pipeline; a material conveyor belt (9) matching the flat plate (3) is further comprised. In the adjustable screening system for silicon residues, high pressure gas is rapidly sprayed out from the blast nozzle (5), and smashed mining slag is horizontally blown out from the flat plate (3), and enters a bending rail limited by the arc-shaped plate (4). After three to four times of smashing and sorting, pure silicon, which is about 30% of the silicon residues in weight; can be obtained, pure residues, which are about 40% in weight, are obtained, and silicon residue mixture powders, which are about 30% in weight, are left. Due to arrangement of a distributor (7), the system has multiple functions.

Description

Adjustable screening system for silicon slag Technical field

The invention relates to the field of recycling of silicon slag, in particular to an adjustable screening system for silicon slag.

Background technique

Silicon slag generally refers to the remainder of the ore after refining, and also contains a certain amount of silicon. There are many kinds of silicon slag, industrial silicon slag, solar silicon slag, semiconductor silicon slag and so on. Silicon slag can be used to re-crystallize, purify, and now silicon is scarce, and the price is high. Silico-manganese slag, also called silico-manganese smelting slag, is an industrial waste slag emitted when smelting silicon-manganese alloy. Its structure is loose, and its appearance is often light green particles, which are composed of some irregular amorphous amorphous particles. The silico-manganese slag is brittle and brittle, and the bulk silicon-manganese slag can be broken into small pieces by the crusher, and then the coarsely crushed material is further pulverized by entering the fine crusher to ensure that the material entering the silo can reach the monomer dissociation. The degree is then evenly sorted by a vibrating feeder and a belt conveyor to the trapezoidal jig. The main purpose of the crushing is to break the structure of the continuous body. The main purpose of the jigging is to recover the silicon-manganese alloy from the silicon-manganese slag. There is a large difference in specific gravity between silicomanganese slag and silicomanganese alloy. The metal and waste slag can be separated by the re-selection of the jig to obtain pure alloy and waste slag. Finally, the concentrate and tail can be separated by dehydration of the dewatering sieve. The mine is dehydrated.

Most of the current silicon slag treatment relies on manual selection. Under certain pulverization conditions, the silicon block with higher purity is selected by manual selection. The advantage of this is that the cost is low, but the efficiency is very poor. Moreover, the utilization rate of silicon slag is also very low; while the trapezoidal jig is used for sorting, the selected silicon has low purity, high cost, and low utilization of silicon slag.

Based on the characteristics of the existing technology and the industrial structure, it is urgent to propose a new process and supporting equipment to re-use industrial silicon slag to change the industrial structure of the silicon industry, optimize the industrial structure allocation, and realize the industrial upgrading.

Summary of the invention

The object of the present invention is to provide an adjustable screening system for silicon slag, which is used for the production of new silicon slag reuse, and realizes preliminary screening of silicon slag.

The invention is achieved by the following technical solutions:

An adjustable screening system for silicon slag, comprising two sealing plates, the two sealing plates are fixedly connected by a plurality of equal height blocks into a frame with an open periphery, and a flat plate is arranged on the opening at the bottom of the frame, one end of the flat plate Connecting a curved plate further includes an air nozzle that is connected to the high pressure gas storage tank by a pipe, and further includes a material conveying belt that is paired with the flat plate. The invention adopts two large-area sealing plates as the main body, and the whole frame is formed by fixed connection of a plurality of contour blocks, the frame has a cubic structure in use state, and the two sealing plates are in a vertical state, the frame is The upper, lower and both sides are open structures. In the state of use, a flat plate is arranged on the opening at the bottom of the frame as a storage place for the input material, and a curved plate is arranged between the two sealing plates, and a jet is also included. The nozzle, the air nozzle and the curved plate are respectively located on two sides of the flat plate, and the air nozzle is connected to the high-pressure gas storage tank through a pipeline. When used, the pulverized slag is transported to the flat plate through the material conveying belt, and the high-pressure storage connected to the air nozzle is opened. In the gas pipeline of the gas tank, the high-pressure gas is quickly ejected from the air nozzle, and the pulverized slag is blown horizontally from the flat plate, and enters a curved orbit which is restricted by the curved plate, and starts to perform a curved motion, in the process, Since the density of the purer silicon block, the purer waste residue, the mixture of the silicon block and the waste residue is different, the driving force of the gas is basically the same, In the space formed by the two sealing plates and the curved plates, the horizontal velocity is different, and the horizontal movement distance is different. According to this characteristic, the crushed silicon slag can be divided into three parts. : purer silicon, purer slag, silicon slag mixture, so that after preliminary pulverization and screening, part of silicon can be selected, and the purer silicon obtained can be directly used for silicon smelting, resulting in pure slag. Directly rounded off, the obtained silicon slag mixture is used for the next pulverization, and then repeated sorting until it can no longer be pulverized. It is found through experiments that after 3 to 4 times of pulverization and sorting, silicon slag can be obtained. About 30% of the weight of pure silicon, get 40% The relatively pure slag left and right, the remaining 30% of the silicon slag mixture powder, thus, by the application of the device of the invention, the artificial screening yield rate can be increased to 5% to 30%, which is sorted relative to the trapezoidal jig The 20% yield of the mode is still greatly improved. At the same time, the structure of the invention is simpler than that of the trapezoidal jig, and the operability is strong, which greatly reduces the input cost of the device; Pure silicon, pure slag, and silicon slag mixture are three parts. By setting two or three collecting hoppers, the three parts of materials are processed through the collecting hopper to form a complete production system.

The curved plate is smoothly connected to the end of the flat plate and curved to the highest point in the direction of the air nozzle. Specifically, the curved bending direction of the curved plate determines the moving direction of the sorting material by the airflow, and the length of the sealing plate can be greatly shortened by setting the structure to be bent and extended toward the air nozzle, saving space, when the curved plate After extending to the highest point, it limits the rising distance of the sorting material, so that its height can be controlled, and the opening at the top and the opening on the side of the frame can quickly spread the pressure of the high pressure gas, reducing the two sealing plates. The air pressure between the two allows the material to complete the free fall motion.

At least two collecting hoppers are arranged under the frame, and the collecting hopper and the flat plate are respectively located at two sides of the air nozzle, and a position adjustable feeder is arranged above the collecting hopper. Further, since the silicon slag is separated into three parts: a relatively pure silicon, a relatively pure slag, and a silicon slag mixture, three parts of the materials are collectively processed through the collecting hopper by providing two or three collecting hoppers. Forming a complete production system, by setting a positionable hopper above the collecting hopper, the top of the hopper is gradually widened downward to form a triangular cross-sectional structure, and the position can be adjusted to facilitate adaptation to different particle sizes. The screening of wind speed can form a multi-purpose machine.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

1. An adjustable screening system for silicon slag according to the present invention, a high-pressure gas is rapidly ejected from an air nozzle, and the pulverized slag is blown horizontally from the flat plate, and enters a curved track defined by the curved plate, and starts. Do curve motion, in this process, due to purer silicon blocks, purer waste, silicon blocks and waste The density of the mixture of slags is different, and the driving force of the gas is basically the same, and the arc movement can be performed in the space formed by the two sealing plates and the curved plates, and the horizontal speeds formed by them are different, causing horizontal movement thereof. According to this characteristic, the pulverized silicon slag can be divided into three parts: purer silicon, purer slag, and silicon slag mixture. Thus, after preliminary pulverization and screening, partial silicon can be selected. The purer silicon can be directly used for the smelting of silicon, and the obtained pure slag is directly discarded. The obtained silicon slag mixture is used for the next pulverization, and then repeated sorting until it can no longer be pulverized. It is known that after 3 to 4 times of pulverization and sorting, relatively pure silicon having a weight of about 30% of silicon slag can be obtained, and about 40% of relatively pure slag is obtained, and about 30% of the remaining silicon slag mixture powder is obtained. Thus, by using the apparatus of the present invention, the artificial screening yield rate can be increased to 5% to 30%, and the 20% yield rate of the sorting method relative to the trapezoidal jig is still allowed. There is a substantial improvement, and the structure of the invention is simple in structure and operability with respect to the trapezoidal jig, which greatly reduces the input cost of the device;

2. The invention relates to an adjustable screening system for silicon slag. The curved plate is arranged in the north to bend and extend toward the air nozzle, which can greatly shorten the length of the sealing plate and save space when the curved plate extends to the highest point. After that, the rising distance of the sorting material is limited, so that the height can be controlled, and the opening at the top and the opening on the side of the frame can quickly spread the pressure of the high pressure gas, reducing the air pressure between the two sealing plates. Allowing the material to complete free fall motion;

3. An adjustable screening system for silicon slag according to the present invention, by setting two or three collecting hoppers, three parts of materials are collectively processed through a collecting hopper to form a complete production system, which is above the collecting hopper. The feeder can be adjusted in position, and the top of the feeder is gradually widened downward to form a triangular cross-sectional structure, and the position can be adjusted to facilitate the screening of different particle sizes and wind speeds, and can be formed into a multi-purpose machine.

DRAWINGS

The drawings are intended to provide a further understanding of the embodiments of the present invention, and are not intended to limit the embodiments of the invention. In the drawing:

Figure 1 is a schematic view showing the structure of the present invention after removing a sealing plate.

Marked and corresponding part names in the drawing:

1-sealing plate, 2-contour block, 3-plate, 4-arc plate, 5-jet nozzle, 6-collector, 7-dispenser, 8-high pressure gas storage tank, 9-material conveyor belt.

detailed description

The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. As a limitation of the invention.

Example

As shown in FIG. 1 , an adjustable screening system for silicon slag comprises two sealing plates 1 , and two sealing plates 1 are fixedly connected by a plurality of equal height blocks 2 into a frame with an open periphery, a contour block. 2 distributed at the edge of the frame to form an unobstructed cavity structure between the two sealing plates 1, the frame has a cubic structure in use, and the two sealing plates 1 are in a vertical state, above the frame, The bottom and both sides are open structures. In the state of use, a flat plate 3 is arranged on the opening at the bottom of the frame as a storage place for the input material, and a curved plate 4 is disposed between the two sealing plates 1, and further includes a The air nozzle 5, the air nozzle 5 and the curved plate 4 are respectively located on two sides of the flat plate 3, and the air nozzle 5 is used for connecting with the high pressure gas. The curved bending direction of the curved plate 4 determines the moving direction of the sorting material by the air flow. By setting the structure to bend and extend toward the air nozzle 5, the length of the sealing plate 1 can be greatly shortened, and space is saved. When the curved plate 4 is extended to the highest point, the rising distance of the sorting material is limited, so that Height can be controlled, while the top is open The opening on the side of the mouth and the frame can quickly spread the pressure of the high pressure gas, reducing the air pressure between the two sealing plates, so that the material can complete the free falling body movement.

In use, the slag that has been pulverized is transported to the flat plate 3 through the material conveying belt 9, and the gas line connecting the high-pressure gas storage tank 8 of the air nozzle 5 is opened, and the high-pressure gas is quickly ejected from the air nozzle 5, and will be pulverized. The slag is blown horizontally from the flat plate 3, and enters a curved track defined by the curved plate 4, and starts to make a curved motion. In the process, due to the purer silicon block, the pure waste residue, the mixture of the silicon block and the waste residue The density of the gas is different, and the driving force of the gas is basically the same, and the arc motion can be performed in the space formed by the two sealing plates and the curved plate, and the horizontal speed formed by the difference is different, and the horizontal movement distance is different. According to this characteristic, the pulverized silicon slag can be divided into three parts: purer silicon, purer slag, silicon slag mixture, and three parts of the material are passed through the collecting hopper by setting two or three collecting hoppers 6. 6 to carry out centralized processing to form a complete production system. After preliminary pulverization and screening, partial silicon can be selected, and the purer silicon obtained can be directly used for smelting of silicon. The pure slag obtained is directly discarded, and the obtained silicon slag mixture is used for the next pulverization, and then the separation is repeated until it can no longer be pulverized; the hopper 7 which can adjust the position is arranged above the hopper 6 The top of the hopper 7 is gradually widened downward to form a triangular cross-sectional structure, and its position can be adjusted to facilitate the screening of different particle sizes and wind speeds, and can be formed into a multi-purpose machine; after trial, it is found that after 3 to 4 After the second pulverization and sorting, it is possible to obtain relatively pure silicon having a weight of about 30% of silicon slag, and obtain about 40% of relatively pure slag, and about 30% of the remaining silicon slag mixture powder, thus, through the apparatus of the present invention. The application can increase the artificial screening yield rate by 5% to 30%, and the 20% yield rate of the sorting method relative to the trapezoidal jig is still greatly improved. At the same time, the structure of the present invention is relative to the trapezoidal jigging. The machine is simple in structure and operability, which greatly reduces the input cost of the equipment.

The specific embodiments of the present invention have been described in detail with reference to the preferred embodiments of the present invention. All modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (3)

An adjustable screening system for silicon slag, characterized in that it comprises two sealing plates (1), and two sealing plates (1) are fixedly connected by a plurality of contour blocks (2) into a frame with an open periphery. A flat plate (3) is arranged on the opening at the bottom of the frame, and one end of the flat plate (3) is connected to a curved plate (4), and further includes an air nozzle (5) connected to the high pressure storage through a pipe. The gas canister (8) also includes a material conveyor belt (9) that mates with the plate (3). The adjustable screening system for silicon slag according to claim 1, characterized in that the curved plate (4) is smoothly connected at the end of the flat plate (3) and bent in the direction of the air nozzle (5) Extend to the highest point. The adjustable screening system for silicon slag according to claim 1, characterized in that at least two collecting hoppers (6), a collecting hopper (6) and a flat plate (3) are arranged under the frame. Located on both sides of the air nozzle (5), a position-adjustable distributor (7) is arranged above the collecting hopper (6).

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