EQUILIBRIUM BETWEEN SILICON AND CALCIUM IN MOLTEN ALUMINUM

摘要

When recycling aluminum it is essential to control the impurity elements which enter the molten metal from scrap. This paper describes the formation method of intermetallic compounds when silicon is removed as an impurity element. From thermodynamic calculation, calcium is chosen as an additional element and the relationship between silicon and calcium content in molten aluminum in the static holding state was investigated. Furthermore, the removal of intermetallic compounds by centrifugation was carried out and equilibrium between silicon and calcium was discussed.