刘建1,刘建华1 ,吴博威1,沈少波2,袁国华3,彭灵芝3.微波场中锰矿粉碳热还原反应研究[J].湖南大学学报:自然科学版,2017,44(12):89~96
微波场中锰矿粉碳热还原反应研究
Study on Carbothermal Reduction Process of Manganese Ore in Microwave Field
  
DOI:
中文关键词:  微波加热  常规加热  失重率  碳热还原  速率增加因子
英文关键词:microwave heating  conventional heating  weight loss rate  carbothermal reduction  rate-increase factor
基金项目:
作者单位
刘建1,刘建华1 ,吴博威1,沈少波2,袁国华3,彭灵芝3 (1.北京科技大学 工程技术研究院北京 100083 2.北京科技大学 冶金与生态工程学院北京 1000833.五矿(湖南)铁合金有限责任公司湖南 湘乡 411400) 
摘要点击次数: 29
全文下载次数: 
中文摘要:
      采用微波加热和常规加热对锰矿粉的碳热还原反应进行了研究.利用热重分析仪研究温度、粒度和碳氧原子摩尔数比等因素对微波场中锰矿粉碳热还原反应速率的影响,并通过拟合得到碳热还原反应过程动力学方程,进而得到微波加热相对于常规加热碳热还原的速率增加因子Q.实验结果表明:在微波加热时,随着碳氧原子摩尔数比的升高,物料升温速率随之提高;同时,反应前期升温速率较大,随着反应的进行,升温速率逐渐降低.提高碳氧原子摩尔数比和温度,微波加热碳热还原反应速率加快.减小粒度可以提高反应速率,但当粒度减小到150目时,进一步减小粒度后,反应速率不会有明显的提高.相同的温度和保温时间下,微波加热失重率远大于常规加热,微波加热的促进作用在低温和低温反应后期更为显著.
英文摘要:
      Carbon thermal reduction reactions of manganese ore powder by microwave heating and conventional heating were investigated. The effects of temperature,particle size and carbon-oxygen ratio on the reduction rates by microwave heating were studied by thermogravimetric analyzer. Afterwards,the dynamic equation of the carbothermal reduction process was obtained by fitting regression,and the rate-increasing factor Q which characterized the rate increase of microwave heating with respect to conventional heating was obtained. The results showed that the material heating rate augmented with the increase of carbon-oxygen ratio,and the heating rate was performed rapidly at the initial stage and then gradually decreased by microwave heating. The increase of both temperature and carbon-oxygen ratio could accelerate the reaction rate. The reaction rate was also significantly increased with the reduction of ore particle diameter till 150 mesh. Moreover,the weight loss of reduction reaction by microwave heating was much larger than that by conventional heating under the same temperature and heat preservation time. It indicated that microwave heating performed evident effect on speeding up the reaction rate at the low temperature and late stage.
查看全文  查看/发表评论  下载PDF阅读器
关闭