Calcium silicon alloy can improve the properties of cast steel more than ferrosilicon
Silicon calcium alloys are mainly used in steelmaking and cast iron production. Silicon calcium alloy is a very good composite deoxidizer, silicon and calcium and oxygen affinity is very big, the resulting oxide can be combined into a complex compound with low melting point, its particles are large, easy to float scum, and into spheres. Calcium and sulfur in the silicon calcium alloy form a stable compound CaS, but CaS is insoluble in molten steel, so the deoxidation of silicon calcium alloy also has the effect of desulfurization. Because the liquid steel deoxidized by Silicon calcium alloy is relatively pure, Silicon calcium alloy is commonly used as deoxidizer when smelting steel and special alloy steel. At present, Silicon calcium alloy can replace aluminum for final deoxidization.
In the production of cast iron, calcium silicon alloy can improve the properties of cast iron more effectively than ferrosilicon. Silica-calcium alloy is an effective inoculant, promoting the formation of spherical stone, but also can play the effect of deoxygenation, desulfurization, denitrification and silicon increase.
