Energy-Efficient Production Of Low/Medium Carbon Ferromanganese

Saving of energy vis-à-vis high throughput per unit time and volume to get high yield and improved process economic and profitability.

This energy-saving process manufactures the low carbon and medium carbon ferromanganese in an electric arc furnace melting and reduction of charge mix occurs simultaneously. The roasted manganese ore in this process is made to react with silicomanganese alloy acting as a reductant.

• Carbothermic roasting of manganese ore ensures reduction of higher manganese oxides into lower manganese oxide and iron oxide to metal iron
• Simultaneous charging of roasted manganese ore, flux, and silicomanganese in EAF
• Very fast metallothermic reactions inside EAF complete within 5-20 min
• Tap-to-tap high throughput volume
• IS grade specification of low-/medium-carbon ferromanganese can be achieved

• Simpler and energy-efficient process
• Coke fines generated in coke processing can be used for roasting of manganese ore
• The off-gas from a SiMn furnace may be used for heating the rotary kiln
• Can be operated in a conventional electric arc furnace
• Simultaneous melting and metallothermic reduction ensure effective utilization of exothermic heat
• High throughput per unit time.
• Easy to maintain the carbon grade of the product by the selection of silicomanganese.
• Scalable and Economical