Abstract:Thermodynamics and kinetics of Metallic Reduction of Polymetallic Nodules were analyzed. The results indicate that MnO2 is preferential reduced with a low initial reduction temperature, NiO、CoO、CuO、FeO are easier reduced than MnO, The initial reduction temperature of FeO is about 712℃(985K), FeO whose initial reduction temperature is about 712℃(985K)is the most difficult to reduce in NiO、CoO、CuO、FeO, The initial reduction temperature of MnO is about 1420℃(1693.15K)using coal as the reductant, An adequate temperature range is provided for selective reduction. The reaction rate of the reaction system is controlled by diffusion process, The solid - phase reaction kinetics equation conforms to kingstinger equation.