Carburization of ferrochromium metals in chromium ore fines containing coal during voluminal reduction by microwave heating

作     者：陈津 赵晶 张猛 晏泓 周剑雄 

作者机构：College of Materials Science and Engineering Taiyuan University of Technology Institute of Mineral Resource Chinese Academy of Geological Science 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2009年第16卷第1期

页      面：43-48页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：Project(50474083) supported by the National Natural Science Foundation of China Project supported by the Baoshan Iron & Steel Co. Ltd. of China 

主　　题：chromium ore fines containing coal (COFCC) ferrochromium metal microwave heating voluminal reduction carburization 

摘      要：Chromium ore fines containing coal (COFCC) can be rapidly heated by microwave to conduct the voluminal reduction, which lays a foundation of getting sponge ferrochromium powders with a lower content of C. Under the conditions of COFCC with n(O)-n(C) (molar ratio) as 1.00-0.84 and n(SiO2)-n(CaO) as 1.00-0.39, the samples were heated by 10 kW microwave power to reach the given temperatures and held for different times respectively. The results show that the low-C-Cr ferrochromium metal phase in the reduced materials forms before the high-C-Cr ferrochromium metal phase does. With increasing temperature the C content of ferrochromium metals is in a positive correlation with the content of Cr. The C content of ferrochromium metal in reduced materials is 0-10.07% with an average value of 4.68%. With the increase of holding time the Cr content in ferrochromium metals is in a negative correlation with the content of C, while the content of Fe changes in the contrary way. In the microwave field the kinetic conditions of carburization are closely related with the temperature of microwave heating, holding time and carbon fitting ratio.