The characteristics of medium carbon ferromanganese are lower carbon content, which can be used in various fields, but it is still widely used in the field of steelmaking. Manganese is a good element for steelmaking. Medium carbon ferromanganese can greatly improve the hardness value of steel in steelmaking. It is used to produce special steel, stainless steel and other special steels. The specially treated medium carbon ferromanganese carbon element can be reduced to around 0.2.
Medium carbon ferromanganese is an indispensable deoxidizer and desulfurized in the steel industry. Good steel needs to be deoxidized and desulfurized in the smelting process, and the use of a deoxidizer will greatly increase the cost. Therefore, ferromanganese is an inexpensive deoxidizer. Desulfurization is to separate sulfur and other harmful substances in steel, so that ferromanganese can achieve the purpose of desulfurization, effectively reduce the content of harmful elements in steel, and improve the quality of steel. In the steelmaking industry, about 3-5 kg of 75% manganese is consumed per ton of steel produced. According to the different carbon content, ferromanganese can be divided into three categories: low carbon: carbon does not exceed 0.7%; medium carbon: carbon does not exceed 0.7% to 2.0%; high carbon: carbon does not exceed 2.0% to 8.0%.
In the foundry industry, adding medium carbon ferromanganese to cast iron can be used as the inoculation material and spheroidizing material of ductile iron, which can prevent the formation of carbides, promote the precipitation of graphite, greatly shorten the spheroidization time, and greatly reduce the formation of impurities in molten iron. Improve the quality of cast iron and improve the performance of cast iron. In addition, the blockage of the water inlet of the smelting furnace is reduced, and the service life of the smelting furnace is effectively prolonged.
In steelmaking, medium carbon ferromanganese is a commonly used alloy as a deoxidizing material and an alloy additive material. Manganese ore for medium carbon ferromanganese smelting generally requires 30-40% manganese, the medium carbon ferromanganese ratio is greater than 7, and the phosphorus-manganese ratio is less than 0.003, the manganese carbonate ore should be roasted before smelting, and then sintered into powder ore. The ore with high iron and phosphorus content can only be used together, or the manganese-rich slag with low iron and phosphorus content can be obtained by selective reduction, and coke is used for reduction in coking. Some factories also use lean coal or anthracite, the auxiliary raw material is mainly lime, and silica is usually added when smelting manganese-silicon alloy.
Due to the characteristics of medium carbon ferromanganese, it is widely used in the foundry industry, in the iron and steel industry and in steelmaking. It is mainly composed of manganese and iron. Ferromanganese is a widely used deoxidizer and alloy material in steelmaking. It is composed of Manganese ore and is smelted by a blast furnace and electric furnace. The density of manganese is 7.43g/cm3, the melting point is 1245, C, and the boiling point is 2150. Manganese and oxygen have a strong affinity and can form stable manganese oxides with oxygen. In addition, manganese As an alloy additive, iron can improve the hardness, plasticity, toughness, and wear resistance of steel. It is widely used in structural steel, tool steel, stainless heat-resistant steel, wear-resistant steel and other alloy steels.