Carbothermic Reduction

Category: science

The primary chemical process inside a furnace where carbon monoxide strips oxygen away from iron ore to produce pure molten iron.

Carbothermic reduction occurs in stages as the raw materials descend through the furnace's thermal zones. Carbon monoxide gas ($CO$), generated by the partial combustion of coke, reacts with hematite ($Fe_2O_3$) to form magnetite ($Fe_3O_4$), then wüstite ($FeO$), and finally metallic iron ($Fe$). The fundamental balance equation governs the carbon-to-oxygen mass ratio required to prevent unreduced ore drops.

Common Examples

• Our furnace optimization script monitors the gas utilization ratio to verify that the carbothermic reduction cycle is maximizing energy efficiency.
• Improper temperature zones inside the stack will stall the carbothermic reduction chain, resulting in unreduced iron tracking into the hearth.