Purification of crude nickel by vacuum distillation

被引：0

作者：

Wang L. ^{[1
]}

Liu D. ^{[1
]}

Yang B. ^{[2
]}

Li X. ^{[2
]}

Xu B. ^{[2
]}

机构：

[1] National Engineering Laboratory of Vacuum Metallurgy, Kunming University of Science and Technology

[2] Key Laboratory of Non-Ferrous Metals Vacuum Metallurgy of Yunnan Province

来源：

Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology | 2010年 / 30卷 / 03期

关键词：

Activity quotient; Nickel; Separation factor; Vacuum distillation;

D O I：

10.3969/j.issn.1672-7126.2010.03.14

中图分类号：

学科分类号：

摘要：

A novel technique was developed to purify 99. 96% crude nickel by vacuum distillation. Various factors influencing the purity of the crude nickel, such as the distillation temperature, the heating temperature and time, the pressure and the cooling rate, were studied. The best-distilled nickel with a purity of 99. 99% can be obtained under the following conditions: a pressure lower than 10 Pa, a heating temperature ranging from 1773K to 1973K, and a heat preservation time of 2. 5 hours. The impurities of Yi, αi, βi, and γio were calculated and their separation degrees from the nickel matrix were characterized with thermal dynamic method. We suggest that it may be feasible to purity crude nickel by vacuum distillation on industrial scale. A dedicated vacuum system with 100 kg capacity of crude nickel was also designed.

引用

页码：283 / 287

页数：4

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