ferrosilicon is an indispensable  in steelmaking industry. for steelmaking, ferrosilicon is used for precipitation deoxidation and diffusion deoxidation. Brick iron is also used as an alloying agent in steel-making， Ferro silicon can be used as alloy elements join agent, widely used in low alloy steel

used as inoculant and nodulizer in cast iron industry. 75 ferrosilicon is an important inoculant and nodularizing agent in theproduction of ductile iron.use as reductant in ferroalloy production. Not only is there a large chemical affinity between silicon and oxygen, ferrosilicon is low in carbon. Therefore, high silicon ferrosilicon (or siliceous alloy) is a kind of reductant commonly used in the production of low carbon ferroalloy in ferroalloy industry.

75 ferrosilicon is commonly used in the high temperature smelting of metallic magnesium in the pidgeon process. When magnesium in Mgo is replaced, about 1.0 tons of ferrosilicon is consumed for every ton of magnesium produced, which plays an important role in magnesium production.