What is ferro manganese

Ferro manganese alloy is an iron alloy composed of manganese and iron, which is used as a deoxidizer and alloy additive in steelmaking and is the most used iron alloy. Reduction smelting of ferro manganese has two kinds of flux method (also known as low manganese slag method) and no flux method (high manganese slag method). The principle of the flux method is the same as that of blast furnace smelting, except that electric energy replaces the coke used for heating. By adding lime to form high basicity slag (CaO/SiO2 1.3~1.6) to reduce the loss of manganese. A low iron and low phosphorus manganese rich slag with low alkalinity (CaO/SiO2 less than 1.0) and high manganese content is formed by fluxless smelting without lime. With this method, the amount of slag is small, the power consumption can be reduced, and the evaporation loss of manganese can be reduced due to the low slag temperature. At the same time, the by-product manganese rich slag (containing 25~40% manganese) can be used as the raw material for smelting manganese silicon alloy, and the comprehensive recovery rate of manganese is higher (more than 90%).

Ferro manganese is widely used, mainly in steelmaking and casting industries.
Ferro manganese is usually used in deoxidizer and desulfurizer, good steel need smelting deoxidizer desulfurization treatment, the use of deoxidizer will greatly increase its cost, so ferro manganese is a cheap deoxidizer, desulfurization refers to steel sulfur and other harmful substances, ferro manganese can achieve the purpose of desulfurization, effectively reduce the content of harmful elements in steel, improve the quality of steel. Ferro manganese is a good accelerator and nodulator in casting. Adding ferromanganese in the casting process can effectively earth fossil ink and greatly shorten the nodularization time. On the other hand, high-carbon ferro manganese can also greatly reduce the shape of impurities in hot metal, improve the quality of cast iron, reduce the blockage of the smelting furnace, and effectively extend the service life of the smelting furnace.