The production methods of high carbon ferromanganese mainly include blast furnace method and electric furnace method.
The production of high-carbon ferromanganese by blast furnace method began in 1875 and has a history of more than 100 years. my country began to use blast furnaces to produce ferromanganese in 1949. The blast furnace method is an early method used in the production of high carbon ferromanganese. This method uses coke as the reducing agent and heat source, dolomite or limestone as the flux, and uses a blast furnace to produce high-carbon ferromanganese. However, since the amount of coke in the charge composition of blast furnace smelting is 5 to 6 times that of electric furnace smelting, more phosphorus in the coke is transferred into the alloy, and the furnace temperature during blast furnace smelting is lower, so during the smelting process The volatilization of phosphorus is about 10% lower than that of electric furnaces.
High carbon ferromanganese produced by the electric furnace method contains less impurities such as silicon, phosphorus and sulfur.
High carbon ferromanganese can be used as an alloy additive in the steelmaking process. Its main function is to increase the manganese content in the molten steel, promote carburization in the molten steel, and evenly distribute the carbon content in the molten steel, thereby improving the quality of the steel and improving the quality of the steel. mechanical properties and corrosion resistance. At the same time, high carbon ferromanganese can also eliminate inclusions produced during the steelmaking process and improve the quality of molten steel.
