Modern large-scale ferromanganese reduction electric furnaces have a capacity of 40,000-75,000 kVA, and are generally fixed and enclosed. The smelting power consumption of the flux method is generally 2500 to 3500 kWh/ton, and the power consumption of the fluxless method is 2000 to 3000 kWh/ton.
The manganese-silicon alloy is smelted in a closed or semi-closed reduction furnace. Generally, ferromanganese with high silicon dioxide and low phosphorus is used as raw material. Manganese-rich slag with low phosphorus content and high silica content is a good raw material for smelting manganese-silicon alloys. The power consumption of smelting is generally about 3500～5000kw·h/ton. The raw materials entering the furnace are pretreated first, including whole grain, preheating, prereduction and powder sintering, etc., which significantly improve the operation and technical and economic indicators of the electric furnace.
