China Nonferrous Metallurgy

Experimental study on oolitic hematile ore smelting reduction was carried out. X-Ray diffiraction (XRD) and optical microscopy obversition (OP) were employed to identify the mineral composition and distribution. The influence of additives, reduction temperature and holding time on metallic iron recovery rate was investigated. Analysis indicated that the carbon content in iron increased exponentially with temperature, the expression was y=0.002·e^0.0064T Total ferrum, P, S content were all increased linearly with temperature. Thermodynamical and reaction kinetics analysis indicated that the solid carbon C_(s) and dissolved carbon [C] participated in [FeO] reduction reaction, the main reactant was solid carbon. The effect of [FeO] and [C] concentration variation on reduction reaction rate decreased with temperature increase. The rate contant of reduction reaction inceased with temperature.