Abstract:In recent years, with the development of alumina industry, a large amount of red mud is accumulated, which seriously pollutes the ecological environment. In this experiment, Bayer red mud was used as raw material, and the effects of hydrogen flow rate, reduction temperature, carbon content, holding time and other factors on the recovery and grade of reduced iron powder during the reduction process were investigated by hydrogen pre-reduction, secondary reduction with carbon, and finally magnetic separation. The results show that under the conditions of mass ratio of red mud to sodium carbonate of 100:5, flow rate of hydrogen of 2600mL/min, temperature of 1000℃, roasting time of 120min, mass ratio of carbon powder to red mud after first reduction of 1:5, the reduced iron powder with grade of 93.19% and recovery of 79.53% can be directly used in the field of powder metallurgy and titanium dioxide industry.