High Grade Silicon Block

The process of smelting metallic Silicon  from silicon oxide minerals is a slag-free process. Chemical silicon smelting is strict in the selection of silica. It not only needs low impurity content, but also requires high mechanical strength, sufficient thermal stability, and appropriate particle size composition. It is best to use silica for chemical silicon smelting. Natural silica exists either as an independent quartz mineral, or as silica, a rock composed almost entirely of silica, or as sandstone in the form of silica. Impurities and adherents in silicon oxide minerals used in the production of chemical silicon are either completely reduced or partially reduced during the smelting process, and some enter the product silicon in the form of compounds or generate slag. This not only increases energy consumption and reduces product quality, but also causes difficulties in the smelting process. Therefore, there are strict requirements on the chemical composition of silicon oxide-containing minerals used in chemical silicon smelting. It is required that SiO2 is greater than 99%, Fe2O3 is less than 0.15%, Al2O3 is not greater than 0.2%, CaO is not greater than 0.1%, and the sum of impurities is not greater than 0.6%. The silica used must be washed with water and the surface must be clean before smelting.