The process of metal silicon 98 is a slag-free process
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The process of metal silicon 98 is a slag-free process
The process of metal silicon 98 is a slag-free process. Chemical silicon smelting requires not only strict selection of silicon dioxide and low impurity content, but also high mechanical strength, sufficient thermal stability, and appropriate particle size composition. Silica for chemical dissolution. Natural silicon oxide can exist as an independent quartz mineral, or as rock silica or sandstone in the form of silica almost piled up with silicon oxide. Some of the impurities and fixatives in the silicon oxide minerals used to produce chemical silicon are completely reduced during the dissolution process, some enter the product silicon in the form of compounds, and some generate slag. The main reducing agents used for chemical silicon smelting are petroleum coke, asphalt charcoal, and charcoal. In order to increase the resistivity of the charge and improve the chemical activity, coal coke, gangue coke, blue charcoal, semi-coke, low-temperature coke, and wood chips can also be combined. The chemical composition of the carbonaceous reducing agent mainly considers the fixation of carbon, ash, volatile components, and moisture. Generally, it is required that the carbon fixation is high, the total amount of reducing agent required is reduced, the impurities brought into the ash are reduced, the amount of slag is reduced, the power consumption is reduced, and the impurity content in the chemical silicon is reduced. This will not only increase energy consumption and reduce product quality, but also bring difficulties to the smelting process. Therefore, the chemical composition of silicon oxide-containing minerals used for chemical smelting silicon is very strict. Carbonaceous reducing agents have high resistivity and high porosity. The resistivity of the charge mainly depends on the carbonaceous reducing agent. Carbonaceous reducing agents have high resistivity, good chemical activity, and high silicon recovery rate.
The above is an introduction to the smelting process of metallic silicon 98. If you need to know more, please feel free to contact us!
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