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Ferrosilicon is a kind of deoxidizer, essential to steel-making. It is widely used in the steel-making and foundry. Ferrosilicon is used in precipitation desoxydation and diffusible desoxydation in the process of steel-making. A certain amount of silicon was added into the steel can help improve its intensity. Hardness and flexibility significantly. It also has a big effect on improving the permeability of steel, bringing down the hysteresis loss of transformer steel.