To avoid the nonuniform phenomena of heat and mass transfer of metallurgical powdery materials caused by conventional heating method, the temperature rise characteristics of carboncontaining chromite ore fines in the microwave field were investigated using microwave heating in a microwave metallurgical furnace. The experimental results show that the carboncontaining chromite ore fines have better temperature rise characteristics in the microwave field at a frequency of 245 GHz. After heated in the microwave field of 10 kW, the temperature of 1 kg carboncontaining chromite ore fines rose up to 1 100 ℃ in 7 min, at a temperature rise rate of 1571 (℃·min-1·kg-1), whereas the temperature of 1 kg carboncontaining magnetite ore fines rose only up to 1 000 ℃ in 10 min, at a temperature rise rate of 100 (℃·min-1·kg-1). With increasing carbonfitting ratios and by adding calcic lime, their heating effects changed regularly.
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