On the base of thermodynamic analysis of pure nickel and iron oxides' hydrogen reduction, direct hydrogen reduction process of a low-grade complex laterite-nickel ores has been studied, the influence of reduction temperature, reduction time, hydrogen content of nitrogen and hydrogen mixture on the reduction degree were investigated, and also the phase analysis of reduction product. Result shows that as the complexity of the laterites’ composition, the reduction rate decreased because of bonding and coating generated from the formation of eutectic phase at high temperature. Optimum condition as reduction temperature 850℃, reduction time 40min, hydrogen content 65% in gas mixture, nickel and iron reduction rates are 43% and 62%. The reduction of iron oxides is a fractional process.
