Blast furnace method: Ferromanganese is produced in a blast furnace with high output and low cost. It is still widely used at home and abroad. The blast furnace method is to add manganese ore, coke, lime and other materials to the blast furnace for smelting to obtain blast furnace ferromanganese containing 52%~76% manganese/0.4%~0.6 phosphorus.
Since the difference between smelting ferromanganese in a blast furnace and an electric furnace lies in the different heat sources, the structure, geometry and operation methods of the furnace body, the principles of smelting ferromanganese in the two furnaces are the same.
However, the phosphorus content of products smelted from the same manganese ore is different. The phosphorus content of blast furnace products is slightly higher than that of electric furnace products by 0.07% to 0.11%. This is because the amount of coke in the charge composition of blast furnace smelting is 5-6 times that of electric furnace smelting. Therefore, more phosphorus in the coke is transferred into the alloy, and the furnace temperature is lower during blast furnace smelting. Therefore, the volatilization of phosphorus during the smelting process is about 10% lower than that of electric furnaces.
The characteristic of medium carbon ferromanganese is lower carbon content. Medium carbon ferromanganese can be used in many fields, but it is still widely used in the field of steelmaking. Manganese is a better element used in steelmaking. Medium carbon ferromanganese can greatly improve the hardness value of steel in steelmaking and is used to produce special steels, stainless steel and other special steels. The carbon element of specially treated medium carbon ferromanganese can be reduced to about 0.2!
Due to the characteristics of medium carbon ferromanganese, it is widely used in the foundry industry, the steel industry and 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 is smelted by blast furnaces and electric furnaces. The density of manganese is 7.43g/cm3², the melting point is 1245℃, and the boiling point is 2150℃. Manganese has a strong affinity with oxygen and can form stable manganese oxide 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 steel, heat-resistant steel, wear-resistant steel and other alloy steels. Manganese also has the ability to desulfurize and reduce the harmful effects of sulfur. effect.
