Ferrosilicon acts as a deoxidizer, alloying agent and reducing agent. The role of silicon manganese is deoxidizing agent, alloying agent and desulfurizing agent. Silicon can significantly improve the elasticity and permeability of steel. Manganese can reduce the brittleness of the stiffness, improve the heat treatment performance of the stiffness, and increase the strength, hardness and wear resistance of the stiffness. Silicon-manganese alloys can deoxidize and may increase the manganese content in the finished steel and increase the strength of the steel. As a result, the proportion of silicon-manganese alloy used as a deoxidizer is gradually higher than that of ferrosilicon. As the saying goes, "you can't make steel without manganese." At present, the role of manganese in the steel production process cannot be replaced by other elements.