The Influence of Cooling Water Flow to Purify the Metallurgical Grade Silicon by Directional Solidification

Abstract:

Directional solidification is one of the most important processes to purify the impurities in the metallurgical grade silicon. A lot of factors could influence the result of directional solidification. In this paper, we researched cooling water flow which could influence the result of directional solidification. We have studied three data of cooling water flow which influenced the results of the removal efficiency of the impurities. Experimental results showed that cooling water flow can influence the density of dislocations and twins in the ingot. The metal impurities of Al, Fe and Ca were concentrated in the middle of the silicon ingot mostly. It was inferred that the bigger cooling water flow was better to the efficiency of the purification in the experiment.

• Periodical: Advanced Materials Research (Volumes 712-715)
• Pages: 784-787
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.712-715.784
• Online since: June 2013
• Authors: Tao Lin, Da Jun Zhang, Chun Yan Duan, Dong Liang Lu
• Keywords: Cooling Water Flow, ICP-AES, Metallurgical Grade Silicon

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