The reduction of iron oxides by volatiles in a rotary hearth furnace process: Part I. The role and kinetics of volatile reduction

摘要: With iron ore reduction processes using coal-ore pellets or mixtures, it is possible that volatiles can contribute to reduction. By simulating the constituents of individual reducing species in volatiles, rates for H2 and CO were investigated temperature range interest; hydrogen major reductant was studied detail. The kinetics by has been found be a complex mechanism with, initially, nucleation growth controlling rate. There catalytic effect existing nuclei, followed mixed control chemical pore diffusion. This results topochemical these oxide particles. Up 1173 K, considerably faster than carbon pellet/mixture CO. It also H2S, which involved with does not affect rate at interest.