Abstract
The separation of refined silicon by gas pressure filtration combined with solvent refining was studied. The purified silicon grains were separated by gas pressure filtration under a pressure differential of 0.2 MPa. In all of the systems, Al–40%Si, Sn–40%Si, Cu–40%Si, and Fe–80%Si, the effect of separation temperature (T) on separation efficiency was evaluated. In Al–40%Si alloy, the silicon content in separated silicon was 91.3 wt% and the recovery rate of silicon was 97.6%, at T = 600 °C. In Sn–40%Si alloy, almost all of the silicon was retained, and the silicon content in separated silicon was 79.4 wt% at T = 600 °C. For Cu–40%Si alloy and Fe–80%Si alloy, the silicon content in separated silicon was over 75 wt% under high superheat. With efficient removal of impurities, the combination of gas pressure filtration and solvent refining is a promising method.
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Acknowledgements
This work was supported by the National Natural Science Foundations of China (Grant No.51804030) and the Key Projects of the State Key Research and Development Plan of China (2016YFB0601304).
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Li, T., Guo, L., Wang, Z., Guo, Z. (2019). The Separation of Refined Silicon by Gas Pressure Filtration in Solvent Refining Process. In: Wang, T., et al. Energy Technology 2019. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-06209-5_25
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DOI: https://doi.org/10.1007/978-3-030-06209-5_25
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