Si-C alloy is a new type of alloy used in converters. It is generally called silicon-carbon alloy and high carbon silicon. It is a replace material of  ferrosilicon, silicon carbide, and recarburizer, reduce the amount of deoxidizer, and be used in the deoxidation alloying process of converter smelting. The effect is stable, and the chemical composition, mechanical properties and internal control quality of the steel are better than the traditional process. High carbon silicon improve the quality of molten steel, improve product quality, improve product new energy, reduce the amount of alloy added, reduce steelmaking costs, and increase economic benefits.