材料期刊网

Temperature Rise Characteristics of CarbonContaining Chromite Ore Fines in Microwave Field

LI Ning , CHEN Jin , YAN Hong , FENG Xiumei , CUI Huijun , LIU Jinying

钢铁研究学报(英文版)

To avoid the nonuniform phenomena of heat and mass transfer of metallurgical powdery materials caused by conventional heating method, the temperature rise characteristics of carboncontaining chromite ore fines in the microwave field were investigated using microwave heating in a microwave metallurgical furnace. The experimental results show that the carboncontaining chromite ore fines have better temperature rise characteristics in the microwave field at a frequency of 245 GHz. After heated in the microwave field of 10 kW, the temperature of 1 kg carboncontaining chromite ore fines rose up to 1 100 ℃ in 7 min, at a temperature rise rate of 1571 (℃·min-1·kg-1), whereas the temperature of 1 kg carboncontaining 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 carbonfitting ratios and by adding calcic lime, their heating effects changed regularly.

关键词: carboncontaining chromite ore fine;carboncontaining magnetite ore fine;microwave field;temperature rise characteristics