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[Chemical Knowledge]：Manufacturing method and process of metal silicon

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The manufacturing method
of metal silicon
1. Introduction

Metal silicon is an important raw material for chemical production, which is widely used in metallurgy, ceramics, glass, electronics and other fields. With the continuous development of science and technology, the manufacturing method of metal silicon is also constantly improved, improving its purity and yield. This article will introduce the manufacturing method of metal silicon, including raw material preparation, electric arc furnace melting, refining and purification steps.

2. Raw Material Preparation

The manufacture of metallic silicon first requires the preparation of suitable raw materials. The main raw materials are quartz sand and coke, in which quartz sand contains a large amount of silica, and coke is used as a reducing agent. In the process of raw material preparation, the content of impurity elements needs to be strictly controlled to ensure the purity of the final product.

3. electric arc furnace melting

electric arc furnace melting is a key step in the manufacture of metallic silicon. The prepared raw material is introduced into an electric arc furnace, and the raw material is melted by the high temperature generated by the arc. In this process, the carbon in the coke reacts with the silica in the quartz sand to produce metallic silicon and carbon monoxide. During the smelting process, it is necessary to maintain a suitable temperature and atmosphere in the furnace to ensure the smooth progress of the reaction.

4. refining and purifying

metal silicon smelting in an electric arc furnace also contains certain impurity elements, so it needs to be refined and purified. In the process of refining, by adding specific additives, the impurity elements and additives are chemically reacted to form compounds that are easy to separate. Then through certain physical operations, such as filtration, distillation, etc., the impurity elements are separated from the metal silicon to obtain high-purity metal silicon.

5. subsequent treatment

refined and purified metal silicon also needs subsequent treatment, such as cooling, crushing, screening, etc., to meet different use requirements. At the same time, it is also necessary to strictly control the quality of the production process to ensure product quality and stability.

6. Conclusion The manufacturing method of

metal silicon includes the steps of raw material preparation, electric arc furnace melting, refining and purification. In the production process, it is necessary to strictly control the process parameters of each link to ensure the purity and yield of the product. At the same time, with the continuous progress of science and technology, the manufacturing method of metal silicon is also constantly improved and optimized, which provides new ideas and methods for improving product quality and production efficiency.

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