Article

This study investigated coal-based hydrogen-carbon coupling reduction technology for reducing iron-containing phases in iron-rich nickel slag. The reaction order for reducing FeO to Fe was calculated using the differential method and validated through experiments.

Results showed that the reaction order decreased with temperature increases, while the reaction rate constant rose. Specifically, as the reduction temperature increased from 1200°C to 1300°C, the reaction order decreased from 1.63 to 1.33, and the reaction rate constant increased from 0.031 to 0.165. The apparent activation energy for the reduction process was determined to be 40.35 kJ/mol.