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| Temperature Rise Characteristics of Carbon��Containing Chromite Ore Fines in Microwave Field |
| LI Ning1,CHEN Jin1,YAN Hong1,FENG Xiu��mei1,CUI Hui��jun1,LIU Jin��ying2 |
| 1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China; 2. No��12 Research Institute, China Electronics Technology Group Corporation, Beijing 100016, China |
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Abstract 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 (�桤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 (�桤min-1��kg-1). With increasing carbon��fitting ratios and by adding calcic lime, their heating effects changed regularly.
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Received: 01 January 1900
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2008, Vol. 15 
