Manganese-silicon alloy is the most important variety of ferroalloys, accounting for about 1/3 of the total output of domestic ferroalloys. Manganese-silicon alloy is mainly made up of manganese ore (including manganese-rich slag), coke and silica. Among them, manganese ore is the main source of manganese element (Mn) in manganese-silicon alloy. Because manganese-silicon alloy requires high ratio of manganese to iron and manganese to phosphorus, it also needs to be used with part of manganese-rich slag with low Fe and P. The role of coke in the production of manganese silicon is the same as that of ferrosilicon, mainly used as reducing agent. Silica is the main source of silicon element (Si) in manganese-silicon alloy.
Manganese-silicon alloys can be divided into ordinary manganese-silicon and high silicon manganese-silicon. Among them, the production of ordinary manganese-silicon alloy accounts for the vast majority, mainly used as composite deoxidizer and alloy agent in steelmaking, in addition to a certain extent as a desulfurizer; High silicon manganese silicon (or low carbon manganese silicon) is mainly used to replace the formula of "electrolytic manganese + ferrosilicon" in stainless steel products to produce 200 series of stainless steel, and used as a reducing agent in smelting and refining of low carbon ferromanganese and electrosilicon thermal production of manganese metal. The benchmark for the futures contract is plain manganese silicon, the most widely used brand known as FeMn68Si18.
Steel-making is the main use of mg-Si alloy. Because adding manganese element (Mn) to steel can improve the quality of steel, reduce the brittleness of steel, but also strengthen the strength of steel, so "no manganese can not become steel". Silicon-manganese alloy has become the main source of Mn in steelmaking due to its excellent cost performance. According to estimates, the average consumption of manganese silicon alloy per ton of crude steel is about 14kg