Metal Impurities Removal from Metallurgical Grade Silicon by Hydrochloric Acid Leaching

Xiao Ming Li; Yan Mei Dang; Wen Feng Li; Jun Xue Zhao; Ya Ru Cui

doi:10.4028/www.scientific.net/AMR.813.7

Paper Titles

Research on Reverse Engineering for Blades of Axial Flow Compressors Based on Parameterization
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Metal Impurities Removal from Metallurgical Grade Silicon by Hydrochloric Acid Leaching
p.7

Distribution of Representative Impurities in Metallurgical-Grade Silicon Using CaO-SiO₂-CaF₂ and CaO-SiO₂-CaCl₂Slags
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The Artificial Neural Network Modeling of Dynamic Hysteresis Phase Diagram: Application on Mean-Field Ising Hysteresis
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Effect of Crack Opening on Distribution of Magnetic Flux Density around Fatigue Cracks
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Numerical Simulation of Cathodic Protection for Jack-Up Platform
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Discussion of Track Tension for Heavy Tracked Vehicles
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Effect of Heat Treatment on the Bending Behavior of STS/Al/STS Hybrid Metal Plates
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 813Metal Impurities Removal from Metallurgical Grade...

Metal Impurities Removal from Metallurgical Grade Silicon by Hydrochloric Acid Leaching

Abstract:

As a pre-treatment process for producing solar-grade silicon, hydrometallurgical method could remove the most of metallic impurities of metallurgical-grade silicon, which is a hopeful technology to provide solar energy material independence of the Siemens skill. Factors such as the hydrochloric mass fraction, temperature, reaction time, and particle size of silicon powders were investigated in the impurities removal experiments under the condition of mechanical stirring. The leached samples were analyzed by ICP and SEM. The optimum parameters, hydrochloric mass fraction 5%, temperature 80°C, reaction time 9h, particle size 75μm, were determined by single factor experiments and orthogonal experiments. The 86.1% of Fe, 68.1% of Al, 85.9% of Ca and 25.9% of B impurity was removed from metallurgical-grade silicon powder.

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Periodical:

Advanced Materials Research (Volume 813)

Pages:

7-10

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.813.7

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Online since:

September 2013

Authors:

Xiao Ming Li, Yan Mei Dang, Wen Feng Li, Jun Xue Zhao, Ya Ru Cui

Keywords:

Hydrometallurgy, Leaching, Metallurgical-Grade Silicon, Solar-Grade Silicon

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