Hydrometallurgical purification of metallurgical grade silicon

稀有金属（英文版）, 2009, 28(3): 221-225. doi: 10.1007/s 12598-009-0043-1

^1, , ^2, , ^3, , ^4,

1.State Key Laboratory of Materials Modification, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

2.State Key Laboratory of Materials Modification, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

3.State Key Laboratory of Materials Modification, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

4.State Key Laboratory of Materials Modification, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

基金项目: 国家自然科学基金(50674018)

Hydrometallurgical purification of metallurgical grade silicon

MA Xiaodong ^1, , ZHANG Jian ^2, , WANG Tongmin ^3, , LI Tingju ^4,

1.State Key Laboratory of Materials Modification, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

2.State Key Laboratory of Materials Modification, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

3.State Key Laboratory of Materials Modification, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

4.State Key Laboratory of Materials Modification, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China

Keywords： metallurgical grade silicon

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 mn was most effective for acid leaching; the extraction yield of impurities was increased by 9% with I-IF leaching compared with HCl leaching and HNO3 leaching, and increased by 7% with ultrasonic stirring compared with mechanical stilting. The principle of hydrometallurgical purification of metallurgical grade silicon under ultrasonic fields was also discussed.

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