Analysis of the High-Purity Aluminum Purification Process Using Zone-Refining Technique

摘要

The article presents the results of an experimental study of the effect of impurity transport in a zone-refining system. In order to further improve the purity of aluminum, therefore, a sample with the purity (99.99%) aluminum material was used for zone refining, and evaluated its purity by glow discharge mass spectrometry (GDMS). In addition, the distribution of impurities after approximately 5 passes of zone refining was analyzed. In experiments, when the zone speed was increased from 5 to 30 mm/min at a zone width of 40 mm, and the zone refining were controlled 5 to 20 passes. The experiment result showed that impurities content was significantly affected by the difference in the number of zone passes. In addition, with the decrease of the moving speed of the melting zone, the content of impurities in the product was also gradually decreased by GDMS analysis.