2017•Key engineering materialsOpen access

The Removal of Impurity Silicon from Aluminum Melt by the Addition of K2TiF6

Guo Liang Zhu, Rui Wang, Wei Wang, Da Shu, An Ping Dong, Dong Hong Wang, Jun Wang

Abstract

A novel method to remove impurity silicon from aluminum melt by the addition of K2TiF6 was studied. The mechanism for silicon removal is the formation and sedimentation of Ti(Al1-x,Six)3 phase and the removal efficiency is mostly decided by the solubility of silicon in TiAl3 phase, which increases with the increasing of the initial silicon concentration in aluminum melt. The effect of holding temperature on the impurity Si purification efficiency was investigated and the result indicated that the effect of holding temperature is very finite.

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Key concepts: Impurity, Silicon, Materials science, Aluminium, Solid solubility, Solubility, Phase (matter), Sedimentation