company news about Production and smelting technology of medium carbon ferromanganese

The raw materials for the production of low carbon ferromanganese by electrosilicothermal method are manganese ore, manganese silicon alloy and lime.

Requirements for manganese ore are: Mn> 40%, Mn/Fe> 7, P<0.1%, SiO2<15% manganese rich oxide ore, smelting low carbon ferromanganese should not be used sinter and manganese rich slag, manganese ore particle size is not greater than 50mm, moisture should be less than 6%.

The requirement of manganese silicon alloy is that the carbon content should be determined according to the carbon content of low carbon ferromanganese in the smelting, and the higher the manganese content, the better. The usual manganese content is 67%-69%. When cold loading is adopted, the particle size of manganese silicon alloy is less than 30mm, and the high carbon layer is removed. Liquid manganese silicon alloy adding method is used to clean the slag during hot mixing.

The requirements for lime are: P≤0.02%, SiO2≤3%, particle size 8-40mm, no carbonaceous inclusions, should not use powdered, unburned lime.