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中南大学学报(英文版)

Journal of Central South University

Vol. 20    No. 2    February 2013

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Purification of indium by vacuum distillation and its analysis
LI Dong-sheng(李冬生)1,2,3, DAI Yong-nian(戴永年)1,2,3, YANG Bin(杨斌)1,2,3,
 LIU Da-chun(刘大春) 1,2,3, DENG Yong(邓勇) 1,2,3

1. National Engineering Laboratory for Vacuum Metallurgy,
Kunming University of Science and Technology, Kunming 650093, China;
2. State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Clear Utilization in
Yunnan Province, Kunming 650093, China;
3. Faculty of Metallurgy and Energy, Engineering Kunming University of Science and Technology,
Kunming 650093, China

Abstract:High purity (99.999% or 5N, mass fraction) indium (In) was obtained through vacuum distillation using a 2N (99%) In as input material under a dynamic vacuum of 5 Pa. The glow discharge mass spectrometry (GDMS) was applied for the analysis of input material and the distilled indium. The results indicate that high-volatile impurities namely Cd, Zn, Tl and Pb can be removed from the indium matrix at the low fraction stage of 1 223 K for 120 min; Low-volatile impurities such as Fe, Ni, Cu, Sn can be reduced at the high fraction stage of 1 323 K for 120 min. The separation coefficient βi and activity coefficient γi of impurities are calculated according to the experiments to fill the inadequate data of the thermodynamics.

 

Key words: vacuum distillation; indium; separation; refining

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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