Analysis of the behavior of magnesium and CO vapor in the carbothermic reduction of magnesia in a vacuum

被引:36
|
作者
Yang, Cheng-bo [1 ,2 ,3 ]
Tian, Yang [1 ,2 ,3 ]
Qu, Tao [1 ,2 ,3 ]
Yang, Bin [1 ,2 ,3 ]
Xu, Bao-qiang [1 ,2 ,3 ]
Dai, Yong-nian [1 ,2 ,3 ]
机构
[1] Kunming Univ Sci & Technol, Natl Engn Lab Vacuum Met, Kunming 650093, Yunnan, Peoples R China
[2] Key Lab Nonferrous Vacuum Met Yunnan Prov, Kunming 650093, Yunnan, Peoples R China
[3] State Key Lab Breeding Base Complex Nonferrous Me, Kunming 650093, Yunnan, Peoples R China
基金
中国国家自然科学基金;
关键词
Carbon monoxide; Magnesium vapor; Carbothermic reduction; Condensation; Vacuum;
D O I
10.1016/j.jma.2014.02.003
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The aim of this paper is to experimentally investigate the behavior of magnesium and carbon monoxide vapor in the carbothermic reduction of magnesia at condensing zone temperatures ranging from 923 K to 1223 K. The phase, surface morphology, and composition of the condensates obtained were examined by means of scanning electron microscopy and energy-dispersive X-ray spectroscopy. The main findings of this paper include: the reverse reaction products, carbon and magnesium oxide, were formed following the process of magnesium vapor condensation, preventing two metal clusters from mutually combining. Moreover, the nearer the temperature of the condensation zone approached the liquid transformation temperature (810-910 K), the lower the rate of the reverse reaction between carbon monoxide and magnesium vapor. Decrease in the rate of the reverse reaction of magnesium was possible by controlling the condensation temperature. Copyright 2014, National Engineering Research Center for Magnesium Alloys of China, Chongqing University. Production and hosting by Elsevier B.V. Open access under CC BY-NC-ND license.
引用
收藏
页码:50 / 58
页数:9
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