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Indexed by:期刊论文

Date of Publication:2009-06-01

Journal:RARE METALS

Included Journals:SCIE、EI

Volume:28

Issue:3

Page Number:221-225

ISSN No.:1001-0521

Key Words:metallurgical grade silicon; ultrasonic field; acid leaching; metallic impurities

Abstract:The effects of the particle size of ground metallurgical grade silicon (MG-Si), the sort of acids, and the type of stirring on the purified efficiency of MG-Si were investigated. It was found that a particle size less than 0.1 mm was most effective for acid leaching; the extraction yield of impurities was increased by 9% with HF leaching compared with HCl leaching and HNO(3) leaching, and increased by 7% with ultrasonic stirring compared with mechanical stirring. The principle of hydrometallurgical purification of metallurgical grade silicon under ultrasonic fields was also discussed.