Tianjin Global Alloy Material Co., Ltd.

In steelmaking, Ferromanganese Balls is used as a deoxidizer and alloy additive and is the most commonly used ferroalloy.

Manganese ore used for smelting FeMn Alloy generally requires a manganese content of 30~40%, a manganese-iron ratio greater than 7, and a phosphorus-manganese ratio less than 0.003. Before smelting, manganese carbonate ore must be roasted and the powdered ore must be sintered and agglomerated.

Ores containing high iron and phosphorus can generally only be used together, or manganese-rich slag with low iron and low phosphorus can be produced through selective reduction. Coke is used as a reducing agent during smelting, and some factories also use lean coal or anthracite. The auxiliary raw material is mainly lime, and silica is generally added when smelting manganese-silicon alloy.

The general international standard for carbon ferromanganese is 75~80% manganese. To adapt to the raw material conditions of low-grade manganese ore, China has stipulated brands with lower manganese content (electric furnace ferromanganese contains more than 65% manganese and blast furnace manganese iron blocks contain 50% manganese. %above).

In the past, blast furnaces were mainly used to smelt carbon ferromanganese. With the development of the electric power industry, the use of electric furnaces has gradually increased.