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Date of Publication:2015-01-01

Journal:特种铸造及有色合金

Issue:10

Page Number:1030-1032

ISSN No.:1001-2249

Abstract:A new method with low-cost and high-efficiency to purify MG (metallurgy grade)-Si was presented. The primary Si was directly separated from hypereutectic Al-Si melt by rotating magnetic field (RMF), after etch cleaning, the solar-grade Si was obtained. The experiment results show that the Si-rich layer is formed in the ouer-layer of the ingot, and the content of Si is about 60% in Si-rich layer, while the inner microstructure of the ingot is composed mainly of the Al-Si eutectic structure. The Si-rich was peeled from the ingot, after aqua regia leaching, which its removal fraction of metallic impurities (i. e. Fe, Ti, Ca, beside Al) was higher than 98%, and for B, P nonmetallic impurities. ?, 2015, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.

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