Affiliation:
1. Inner Mongolia University of Science and Technology
2. inner mongolia univercity of science and technology
Abstract
In this paper, the method of microwave reduction roasting was applied to investigate the heating and weight loss process from hematite to magnetite in crude niobium concentrate under the protection of argon. The kinetics of microwave reduction roasting of hematite in crude niobium concentrate were analyzed and calculated at the temperature range of 500°C ~850°C by way of non-isothermal thermogravimetry and isothermal gravimetric analysis. Results from this investigation demonstrated that the activation energy of microwave reduction roasting calculated by non-isothermal thermogravimetry was 26.5769kJ•mol-1, and the activation energy calculated by isothermal gravimetric analysis was 64.1203kJ•mol-1. Compared with the method of reduction roasting under resistance heating, the activation energy of microwave reduction roasting was small, and the reaction rate was fast.
Publisher
Trans Tech Publications, Ltd.
Reference15 articles.
1. Mourao M B, Carvalho I P, Takano C. ISIJ International, 2001, 41 (Supplement): S27-S30.
2. Mengyang Huang, Jinhui Peng, Ming Huang, etc. The Chinese Journal of Nonferrous Metals, 2007, 17(3): 476-480. ( in chinese).
3. Standish N, Huang W. ISIJ International, 1991, 31(3): 241-245.
4. Yu A B . 6th Aus IMM Extractive Metallurgy Conference Metal[C]. 1994 , 225 - 232.
5. Y X Hua. ACTA Metallurgical sinica, 1996, 9(3): 497-501.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献