Ferromanganese is an iron alloy composed of manganese and iron. Its raw materials are divided into manganese ore, coke and lime, which are generated by high temperature melting reaction. Ferromanganese is mainly used in converter, and electric furnace high-carbon ferromanganese is mainly used in steelmaking as deoxidizer, desulfurizer and alloy additive.

Ferromanganese is irregular block, according to the provisions of each weight is not more than 20 kilograms, in the humidity of the warehouse storage is not more than a year, in the dry area or warehouse storage is not more than a year and a half, ferromanganese in water damp will rust, the surface black.