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

作　　者：Cheng-bo Yang Yang Tian Tao Qu Bin Yang Bao-qiang Xu Yong-nian Dai 

机构地区：[1]National Engineering Laboratory for Vacuum Metallurgy,Kunming University of Science and Technology,Kunming 650093,China [2]Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province,Kunming 650093,China [3]State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Clear Utilization in Yunnan Province,Kunming 650093,China

出　　处：《Journal of Magnesium and Alloys》2014年第1期50-58,共9页镁合金学报（英文）

基　　金：Foundation item:Project(No.51304095)supported by National Natural Science Foundation of China;Science and Technology Planning Project of Yunnan Province,China(No.S2013FZ029);Personnel training Funds of Kunming University of Science and Technology,China(No.14118665).

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.

关 键 词：Carbon monoxide Magnesium vapor Carbothermic reduction CondensationVacuum 

分 类 号：TG1[金属学及工艺—金属学]