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

作　　者：LI Ning CHEN Jin YAN Hong FENG Xiu-mei CUI Hui-jun LIU Jin-ying 

机构地区：[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

出　　处：《Journal of Iron and Steel Research International》2008年第1期1-5,共5页

基　　金：Item Sponsored by National Natural Science Foundation of China and Baoshan Iron and Steel Group Co(50474083)

摘　　要：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.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 fieldl temperature rise characteristics 

分 类 号：TF111[冶金工程—冶金物理化学]