工程科学学报2017，Vol.39Issue(2)：208-214,7.DOI:10.13374/j.issn2095-9389.2017.02.007
微波加热与常规加热硅锰粉固相脱硅动力学比较
Comparison on the solid-state desilication kinetics of silicon manganese powder by microwave heating and conventional heating
摘要
Abstract
The solid-state desilication kinetics of silicon manganese powder and Brazil manganese powder was investigated by mi-crowave heating and conventional heating. During the two processes, Brazil manganese powder which reacted with silicon in silicon manganese was used as the desilication agent. The mixture was heated up to different temperatures and preserved heat for some time by microwave heating and conventional heating, respectively. The silicon content of desilication materials was measured and the apparent activation energy of desilication reaction was calculated. The results show that the single raw material and the mixture could be heated up in the microwave field in a short time. The desilication rate increases with the increase of heating temperature and holding time by both heating methods. The desilication rate and the reaction rate under the microwave field are significantly higher than those by con-ventional heating. Microwave heating can increase the rate of solid phase desilication. The restrictive step of solid-state desilication ki-netics of silicon manganese powder and Brazil manganese powders by microwave heating is the diffusion step. The apparent activation energy of desilication reaction under the microwave field is 102. 93 kJ·mol-1 , but the apparent activation energy of desilication reaction by conventional heating is 180 kJ·mol-1 . The microwave heating field can improve the kinetics condition of solid phase desilication, increase the reaction rate of solid phase desilication and reduce the activation energy of desilication reaction.关键词
微波加热/固相脱硅/表观活化能/反应动力学Key words
microwave heating/solid phase desilication/apparent activation energy/reaction kinetics分类
矿业与冶金引用本文复制引用
刘建,刘建华,吴博威,沈少波,袁国华,彭灵芝..微波加热与常规加热硅锰粉固相脱硅动力学比较[J].工程科学学报,2017,39(2):208-214,7.基金项目
国家自然科学基金资助项目(51574022) （51574022）
中央高校基础科研业务费资助项目(FRF-IC-15-001) （FRF-IC-15-001）
