自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(英文版)

Journal of Central South University

Vol. 11    No. 2    June 2004

[PDF Download]    [Flash Online]

    

Purification technology of molten aluminum
SUN Bao-de(孙宝德), DING Wen-jiang(丁文江), SHU Da(疏 达), ZHOU Yao-he(周尧和)

State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200030, China

Abstract:Various purification methods were explored to eliminate the dissolved hydrogen and nonmetallic inclusions from molten aluminum alloys. A novel rotating impeller head with self-oscillation nozzles or an electromagnetic valve in the gas circuit was used to produce pulse gas currents for the rotary impeller degassing method. Water simulation results show that the size of gas bubbles can be decreased by 10% 20% as compared with the constant gas current mode. By coating ceramic filters or particles with active flux or enamels, composite filters were used to filter the scrap A356 alloy and pure aluminum. Experimental results demonstrate that better filtration efficiency and operation performance can be obtained. Based on numerical calculations, the separation efficiency of inclusions by high frequency magnetic field can be significantly improved by using a hollow cylinder-like separator or utilizing the effects of secondary flow of the melt in a square separa-tor. A multi-stage and multi-media purification platform based on these methods was designed and applied in on-line pro-cessing of molten aluminum alloys. Mechanical properties of the processed scrap A356 alloy are greatly improved by thecomposite purification.

 

Key words: aluminum; purification; hydrogen; inclusion; electromagnetic separation; filtration

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
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号