Impurity distribution in preparation of high-purity aluminum by vacuum zone melting

被引：7

作者：

Duan, Meng-ping ^{[1
,2
,3
,4
]}

Zhao, Jin-yang ^{[1
,2
,3
,4
]}

Xu, Bao-qiang ^{[1
,2
,3
,4
]}

Kong, Ling-xin ^{[1
,2
,3
,4
]}

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

Wan, He-li ^{[1
,2
,3
,4
]}

Fu, Cheng-cheng ^{[2
]}

机构：

[1] Kunming Univ Sci & Technol, Natl Engn Res Ctr Vacuum Met, Kunming 650093, Peoples R China

[2] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China

[3] Key Lab Vacuum Met Nonferrous Met Yunnan Prov, Kunming 650093, Peoples R China

[4] State Key Lab Nonferrous Met Resources Clean Utili, Kunming 650093, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2023年 / 33卷 / 09期

关键词：

vacuum zone melting; high-purity Al; equilibrium distribution coefficient; impurity purification; SOLUTE DISTRIBUTION COEFFICIENTS; PURIFICATION; OPTIMIZATION;

D O I：

10.1016/S1003-6326(23)66302-2

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A novel vacuum zone melting process for preparing high-purity Al was proposed. The axial segregation of impurities was investigated by determining the equilibrium distribution coefficient. Theoretical and experimental results showed that impurities (Cu, Si, and Fe) with an equilibrium distribution coefficient k(0)<1 accumulated in the tail of the Al ingot, while Ti (k(0) >1) accumulated at the head end of the ingot. When the molten area moving at 1.5 mm/min and zone melting was performed 15 times, the removal rate of the impurities and the purity of Al were the highest. In the middle of the Al ingot, i.e. 140 mm away from the head end of the sample, the removal rates of Cu, Fe, and Si were higher than 90%, that of Ti was higher than 75%, and the Al content was higher than 99.999%. The purity of the Al samples met the requirements of the commercial 99.999% (5N) high-purity Al standard.

引用

页码：2843 / 2852

页数：10

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