Manganese is one of the most important alloying elements in iron and steel materials. Manganese can change the strength, hardness, toughness, wear resistance, heat resistance and other properties of iron and steel materials. Manganese in iron and steel materials is mainly obtained by adding ferromanganese alloy to its melt.
Ferromanganese can be divided into high carbon, medium carbon and low carbon ferromanganese due to different carbon content. Among them, high carbon ferromanganese is strictly limited due to its high carbon content, which will significantly increase the carbon content of steel when added to steel materials. Due to its low carbon content, low-carbon ferromanganese does not have problems similar to high-carbon ferromanganese. Therefore, low-carbon ferromanganese is used more than high-carbon ferromanganese. It is an important raw material for the production of stainless steel, heat-resistant cast steel, heat-resistant cast iron, wear-resistant steel and structural steel. In the past, the production of low-carbon ferromanganese was mainly through blowing oxygen and decarburization into the liquid high-carbon ferromanganese melt to convert high-carbon ferromanganese into low-carbon ferromanganese, and then use silicon manganese alloy to reduce the oxidized melt to improve the yield of manganese. The production process of liquid oxidation decarbonization of high carbon ferromanganese is complex, high cost and serious environmental pollution.
