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Method for processing silicon powder and its system

A processing method and technology of silicon powder, applied in chemical instruments and methods, methods of granulating raw materials, silicon and other directions, can solve the problems of poor labor conditions and environmental protection, difficult particle size control, and low powder yield, etc. The conveying speed is slow, the air consumption is small, and the effect of reducing the baking process

Inactive Publication Date: 2006-04-19
蓝星安迪苏股份有限公司
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  • Summary
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AI Technical Summary

Problems solved by technology

[0008] The traditional powder making method adopts the ball milling method, which has disadvantages such as difficulty in particle size control, poor working conditions and poor environmental protection. In the past domestic and foreign patents and documents, there are not many reports on silicon powder processing methods and systems, especially for the production of organochlorosilanes. The processing of silica fume has not been reported
According to an abstract report, compared with ball milling milling, the use of punching milling milling process has the advantages of convenient operation and good environmental protection, but there are still defects such as poor safety and low milling yield.

Method used

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Embodiment Construction

[0017] The silicon block is hoisted into the silo by a crane at a flow rate of 3.1T / h, conveyed and measured by a belt, and then enters the jaw crusher, and the particle size of the crushed product is controlled to be about 30mm. After entering the crushed material bin through the bucket elevator, the material is fed into the vertical mill through electromagnetic vibration. Under the action of negative pressure -0.005MPa, the ground silicon powder is lifted to the bag filter by nitrogen gas, and the clean gas system Recycling, the filtered silicon powder is screened, and a part of the coarse powder is returned to the mill by using the potential difference. The qualified silicon powder (average particle size is 80μm) enters the finished product warehouse at a flow rate of 3T / h, and the silicon powder in the finished product warehouse is fed by the gas The knife-type pulse pneumatic conveying device is sent to the organochlorosilane synthesis system. Because the surface of silic...

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PUM

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Abstract

The present invention relates to a processing method of silicon powder. The silicon powder can be ground to a certain grain size for synthesizing organic chlorosilane monomer. It includes breaking device, grinding device, dust-removing device, conveying device and correspondent connecting pipeline and nitrogen gas circulating use system.

Description

technical field [0001] The invention relates to a processing method for grinding silicon block into a certain particle size and silicon powder for synthesizing organochlorosilane monomers. Including crushing device, milling device, dust removal device, conveying device and corresponding connecting pipes and nitrogen recycling system. Background technique [0002] Silicon has a profound impact on the development of science and technology and economy. Its main uses are: [0003] 6. Important raw materials for semiconductor devices, especially on integrated circuits. [0004] 7. The main raw material for the synthesis of organosilicon and chlorosilanes. [0005] 8. Make temperature-resistant, corrosion-resistant and wear-resistant coatings. Such as the production of silicon nitride. [0006] 9. Prepare special coatings. [0007] 10. An important component of aluminum-silicon alloy. [0008] The traditional powder making method adopts the ball milling method, which has di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/02B02C1/00B01J2/00C07F7/00
Inventor 汤庆成郭守涛郑重宋小明舒道德程红斌贾怀高
Owner 蓝星安迪苏股份有限公司