Condensation of Mg-vapor in vacuum carbothermic reduction of magnesia

被引：0

作者：

Liu, Hai ^{[1
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,3
,4
]}

Tian, Yang ^{[1
,2
,3
,4
]}

Yang, Bin ^{[1
,2
,3
,4
]}

Liu, Dachun ^{[1
,2
,3
,4
]}

Xu, Baoqiang ^{[1
,2
,3
,4
]}

Qu, Tao ^{[1
,2
,3
,4
]}

Dai, Yongnian ^{[1
,2
,3
,4
]}

机构：

[1] National Engineering Laboratory for Vacuum Metallurgy, Kunming

[2] State Key Laboratory of Complex Non-Ferrous Metal Resources Clear Utilization, Kunming

[3] Key Laboratory of Vacuum Metallurgy for Nonferrous Metal of Yunnan Province, Kunming

[4] Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming

来源：

Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology | 2015年 / 35卷 / 07期

关键词：

Condensation temperature; Magnesium vapor condensation; Temperature gradient; Vacuum;

D O I：

10.13922/j.cnki.cjovst.2015.07.14

中图分类号：

学科分类号：

摘要：

We experimentally addressed the direct recovery of Mg vapor by condensation in carbothermic reduction of magnesia in vacuum. The influence of the condensation conditions, including the temperature, temperature gradient and pressure, on the recovery efficiency of Mg vapor was investigated with X-ray diffraction, and scanning electron microscopy and energy dispersive spectroscopy. The results show that the pressure, condensation temperature and temperature gradient, strongly affect the recovery efficiency of Mg vapor and microstructures of Mg condensate. To be specific, in the 30~100 Pa range and with a fixed temperature gradient, a temperature close to the dew-point of Mg vapor resulted in high Mg recovery efficiency; at the optimized condensation temperature and pressure, a decreased temperature gradient increased the compactness and grain-size of the 90.05% pure Mg-condensate. ©, 2015, Science Press. All right reserved.

引用

页码：867 / 871

页数：4

共 10 条

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