Silicon Carbide is a new kind of reinforced steel-making deoxidizing agent and ideal thermal insulating agent. It is used for deoxidation. The usage dose is 1-4kg/t can make electricity consumption to reduce 15-20Kw/h and time to reduce 15-20min per furnace to raise productivity rate to 8-10%. Large melting furnace, longer melting time, lead to more crystallization, bigger crystals, higher purity and less impurities.