Manganese silicon alloy is a commonly used composite deoxidizer in steelmaking, as well as a reducing agent for the production of medium and low carbon ferromanganese and the production of metallic manganese by electro silicothermic method.
Manganese and silicon are the main alloying elements used in carbon steel. Manganese is one of the main deoxidizers in the steelmaking process, and almost all steel grades require manganese for deoxidation. Because the oxygen products generated when using manganese for deoxidation have a lower melting point and are easy to float up; Manganese can also increase the deoxidation effect of strong deoxidizers such as silicon and aluminum. All industrial steel requires the addition of a small amount of manganese as a desulfurizer to enable hot rolling, forging, and other processes without fracture. Manganese is also an important alloying element in various steel grades, and more than 15% manganese is also added to alloy steel to increase its structural strength. Silicon is an important alloying element in pig iron and carbon steel, second only to manganese. In steel production, silicon is mainly used as a deoxidizer for molten metals or as an alloy additive to increase steel strength and improve its properties. Silicon is also an effective grinding medium, which can convert carbon in cast iron into free grinding carbon. The silicon content in standard gray cast iron and nodular cast iron can reach 4%. A large amount of manganese and silicon are added to the molten steel in the form of ferroalloys: manganese iron, silicon manganese, and silicon iron.
Silicon manganese alloy is produced by simultaneously reducing manganese ore (including manganese rich slag) and manganese oxide and silicon dioxide in silica using carbon in a submerged arc furnace. The production of manganese silicon alloy is carried out in a submerged arc furnace, using carbon reducing agents, manganese ore, manganese rich slag, sintered manganese ore, roasted manganese ore, and silica as raw materials, and lime, dolomite, fluorite, and other fluxes as fluxes for continuous production in the electric furnace.