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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