First, ferrosilicon is very common in the steel-making industry.It is mainly used as a deoxidizer and an alloying agent. That’s because there is a step in the steel-making process, which is deoxidation. Because silicon and oxygen have a great affinity, that’s why ferrosilicon is used as a deoxidizer.
Second, ferrosilicon in cast iron, can be used as inoculant and spheroidizing agent, adding some ferrosilicon in the production process can effectively prevent the formation of iron carbide and thus effectively help graphite spheroidizing.
Third, ferrosilicon can be used as a coating electrode.