Reduction of Iron Oxide in Molten Slag with H₂ Gas

The effect of FeO concentration, H2 % and H2O % in reducing gas on the reduction rate of FeO in blast-furnace-type slag has been studied by measuring the weight-loss change of slag in MgO crucible with time at 1450°C.The results obtained are as follows:1) The reduction rate is expressed as, V=4.6×10-4√PH2(NFeO-0.72PH2O/PH2)g-oxygen/cm2·s2) A value of 3 × 10-4 cm2/s is suitable for the diffusion coefficient of iron oxide in slag.3) The order of reduction rate of FeO in molten slag by H2 gas under a blast furnace condition is almost the same as that by solid carbon.