![]() The raw materials used in Si-Mn production mainly consist of Mn ore, high C Fe-Mn slag, quartzite, coke and coal, and fluxes (dolomite or calcite). ![]() Good electrode penetration is therefore essential to have adequate heat to drive the reactions to completion. In the carbo-thermic reduction of oxidic raw materials, heat is just as essential for reduction as C is, due to the endothermic reduction reactions and a deficiency of heat can cause incomplete. The common sizes of the SAF used for the production of Si-Mn are normally in the range 9 MVA to 40 MVA producing 45 tons to 220 tons of Si-Mn per day. Operation of the process for the Si-Mn production is often more difficult than the Fe-Mn production process since higher process temperature is needed. Si-Mn is produced by carbo-thermic reduction of oxidic raw materials in a three-phase, alternating current (AC), submerged arc furnace (SAF) which is also being used for the production of Fe-Mn. Of particular interest is its modifying effect on the iron-carbon (Fe-C) system by increasing the hardenability of the steel. Manganese is used as an alloying element in almost all types of steel. Mn is a milder deoxidizer than Si but enhances the effectiveness due to the formation of stable manganese silicates and aluminates. They are used as deoxidizers, desulphurizers and alloying elements. Use of Si-Mn during steelmaking in place of a mix of high carbon ferro-manganese (Fe-Mn) alloy and ferro-silicon (Fe-Si) alloy is driven by economic considerations.īoth Mn and Si are crucial constituents in steelmaking. The steelmaking industry is the only consumer of this alloy. Si-Mn alloy grades are medium carbon (MC) and low carbon (LC). ![]() ![]() A standard Si-Mn alloy contains 65 % to 70 % Mn, 15 % to 20 % Si and 1.5 % to 2 % C. Silico-manganese (Si-Mn) is an alloy used for adding both silicon (Si) and manganese (Mn) to liquid steel during steelmaking at low carbon (C) content. coal, coke, deoxidizers, Fe-Mn, Fe-Si, Ferro alloys, Si-Mn, steelmaking ,.Production of Silico-Manganese in a Submerged Arc Furnace ![]()
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