Main application of Silicon-manganese alloy: Silicon-manganese is a kind of alloy that consists of silicon, manganese, iron and few carbon or some other elements, it’s a ferrous alloy which is used widely and high production capacity. Its consumption is in second in ferroalloy production. The manganese and silicon in silicon-manganese have strong oxygen affinity, using the silicon-manganese in smelting steel, will produce MnSiO3 and MnSiO4, their melting point are 12700C and 1327 0C respectively, which has the advantages of low melting point, big granule, easy to float up, good deoxidizing effect and so on. In the same condition, using manganese or silicon to deoxidize separately, the burn out rate are 46% and 37%, but it is only 29% if using manganese alloy to deoxidize. So, it is used widely to smelting steel and its output increases faster than ferroalloy’s, so has become an indispensable composite deoxidizing and alloy additives in steel industry. The silicon-manganese which contains carbon below 1.9% still is used to produce medium/low-carbon ferromanganese and semi-finished products of electro silicothermic process manganese metal. In the ferroalloy production enterprises, they called the silicon-manganese for steelmaking as commercial silicon-manganese, the silicon-manganese for medium/low-carbon ferromanganese as self-use silicon-manganese and the silicon-manganese for making manganese metal as high silicon-manganese.