Calcium Silicon is used to control the shape, size and distribution of oxide and sulfur residues that affect the fluidity, workability, ductility and impact properties of the final product.
Calcium-Silica alloys are used as deoxidant and desulfurizer in steel production. Calcium and Silicon both have a strong chemical affinity for oxygen. Calcium in particular has a strong chemical affinity not only for oxygen but also for sulfur and nitrogen.
Calcium Silicon can also be in powder form and can be used in wire form. Wire CaSi may be used in integrated steelmaking facilities. The reason for this is that CaSi can be difficult to hold in the liquid metal due to its very low density and high reactivity compared to steel.