Effects of NaOH Content on the Reduction Kinetics of Hematite by Using Suspension Magnetization Roasting Technology

Red mud is a potential iron resource that needs to be urgently exploited and utilized. However, due the properties of high alkalinity, fine particle size complex mineral composition, utilization red difficult. Focusing on mud’s prominent feature this paper studies influence NaOH content reduction kinetics hematite, which main component mud. The results show conversion degree hematite was strongly inhibited by NaOH, magnetization specific magnetic susceptibility products significantly decreased with increase in content. Meanwhile, calculation parameters demonstrate addition did not affect control step while it dramatically rate hematite. Moreover, thermodynamic analysis SEM-EDS detection were conducted uncover mechanism indicated sodium ferrite could produced spontaneously under experimental conditions hard for further reduced CO. Furthermore, formed dense film, covered surface particles, inhibiting diffusion CO thereby hindering interior