Why Is Ferromanganese Added in Iron Smelting?

Manganese is one of the important alloying elements in steel materials. Manganese can change the strength, hardness, toughness, wear resistance and heat resistance 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. Low carbon ferromanganese due to the low carbon content does not have problems similar to high carbon ferromanganese, so low carbon ferromanganese is larger than high carbon ferromanganese, widely used, is the production of stainless steel, heat-resistant cast iron, heat-resistant cast steel, and structural steel important raw materials.

Low carbon ferromanganese is some special steel necessary smelting raw materials, low carbon ferromanganese is mainly used in steelmaking to enhance the hardness and toughness of steel, low carbon ferromanganese production method is little known, blast furnace method to produce low carbon ferromanganese is one of the more common production methods, the production method is basically the same as casting pig iron, the principle is to extract manganese and iron from ore, However, the difference is that there are some special rules in steelmaking ferromanganese, which are the basic system basis for the establishment of blast furnace ferromanganese production operation.

In the past, the production of low carbon ferromanganese was mainly by blowing oxygen into the liquid high carbon ferromanganese melt to decarburize the high carbon ferromanganese into low carbon ferromanganese, and then using silicon manganese alloy to reduce the peroxide molten liquid to improve the yield of manganese. Liquid oxidation and decarburization of high carbon ferromanganese has complicated production process, high cost and serious environmental pollution.

Nowadays, the main raw materials for the production of low-carbon ferro manganese ore are coke and flux, etc., the raw materials are loaded into the furnace from the top of the furnace, and the high-temperature air or oxygen-rich pump is sent into the furnace through the tuyere, so that the coke is burned to obtain the high-temperature reduction gas reduction ore, the slag and metal are deposited at the bottom of the furnace, and the slag and iron are regularly discharged through the slag iron outlet. With the melting, reaction and discharge of the charge, new charge is continuously added to achieve continuous production.