Carbothermal Reduction of SiO2 Using Different Coal

In this study, the carbon thermal reduction of agglomerate composed of pure silica and carbon was studied at 1898 K, 1923 K, and 1948 K. The main product of this reaction is silicon carbide. Compare the reduction effects of four types of coal from different industrial silicon enterprises on the analysis of pure silica, and explore the application of different coal in silicon production. C4 coal has high SiO reactivity, while C1 coal has low SiO reactivity. An increase in temperature will reduce the reaction matching degree of coal and increase the amount of SiO gas escaping. C4 coal has a high and stable reaction matching degree, and the reaction rate is less affected by temperature, making it the best coal among the four types to produce SiC.