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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 3    June 2003

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Purification of scrap aluminum foil and aluminum melt covering and protecting & atomic purification theory
NI Hong-jun(倪红军)1,2, SUN Bao-de(孙宝德)2,
LIU Man-ping(刘满平)2, DING Wen-jiang(丁文江)2

1. Department of Mechanical Engineering,
Nantong Institute of Technology, Nantong 226007, China;
2. College of Materials Science and Engineering,
Shanghai Jiaotong University, Shanghai 200030, China

Abstract:A new flux, JDN-I, including rare earth compounds, for purification of the scraps of 99.99% aluminum foil was introduced. The experimental results indicate that its function of degassing and deoxidizing is excellent. The hydrogen content of the scrap aluminum foil melt purified by JDN-I flux decreases greatly from 4.5mL/kg to 1.2mL/kg at 720℃. The tensile strength of the samples refined with JDN-I flux increases by 19.2% and the elongation increases by 38.3% in comparison with those without flux. The purification mechanism of JDN-I was discussed and a theory of covering, protecting & atomic purification was also put forward.

 

Key words:  degassing; deoxidation; scrap aluminum foil; rare earth flux; atomic purification

ISSN 1672-7029
CN 43-1423/U

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