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The preparation of microsized hematite powder from ferrous sulfate using microwave calcination was investigated based on the TG/DTG curves.The decomposition of industrial ferrous sulfate under air atmosphere was divided into three stages,and a ferrous sulfate sample added with 15％ Fe2O3 could strongly absorb microwave energy.Therefore,preparing hematite powder from ferrous sulfate using microwave calcination was feasible.Hematite was obtained under the following optimized conditions:calcination temperature,850 ℃;microwave power,650 W;and sample amount,40 g.The obtained hematite satisfied the first-grade quality requirements.The total fermm value was more than 58％,and the total sulfur and phosphorus contents were less than 0.5％ and 0.2％,respectively.X-ray powder diffraction and scanning electron microscopy were used to characterize the structure and morphology of microsized hematite powder.The particles were non-spherical in shape,and the average particle size distribution was 10.45 μm.This work provides new potential applications for waste ferrous sulfate.