The Possibility of Silicon Purification by Metallurgical Methods: Part I

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Abstract

This silicon purification research work has two stages and results will be provided in two articles due to the large scope of work. This paper provides the results of the first stage, concerning the metallurgical silicon purification. Silicon was purified by a combined method consisting of slag refining with new slag composition and acid leaching. In the first phase, the metallurgical grade silicon produced by the classical carbothermic reduction method was investigated. In the second phase, the metallurgical purification by slag refining was completed using slags of various new compositions. The purified silicon samples obtained after the melting processes were analyzed for concentrations of impurities. Finally, acid leaching treatment of the obtained silicon was done, followed by elemental analysis of purified silicon. According to our experience we can determine that obtained silicon purity is adequate for further stages of planned study.

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Serikkanov, A., Pavlov, A., Mukashev, B., Turmagambetov, T., Kantarbayeva, D., & Zholdybayev, K. (2022). The Possibility of Silicon Purification by Metallurgical Methods: Part I. Processes, 10(7). https://doi.org/10.3390/pr10071353

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