Dephosphorization of Iron Ore Bearing High Phosphorous by Carbothermic Reduction Assisted with Microwave and Magnetic Separation

概要

論文の詳細を見る
The integrated process, which combined the carbothermic reduction assisted with microwave irradiation followed by milling and magnetic separation, was investigated as a potential approach for dephosphorization treatment of iron ores bearing high P. Mineralogical Research indicated that the phosphorous in oolitic hematite ores exists in two forms, inter-grew with iron oxide or gather together into a bigger size as gangues. The increase of microwave irradiation time had substantial effect on the reduction of Fe while the influence of carbon dosage was not obvious. As the reduced iron and unreduced P-contained gangues were not efficiently separated, a high iron recovery ratio and a reasonable dephosphorization rate were incompatible under the conditions investigated in this study. This process was successful in the aspect of iron recovery but the dephosphorization rate was unsatisfactory. Microwave-assisted reduction could be a promising pre-reduction process which could be followed by smelting process and dephosphorization treatment.