Separation of Metal Impurities from Metallurgical Grade Silicon via CaO-SiO₂-CaF₂ Slag Treatment Followed by Leaching with Hydrochloric Acid

REFERENCES

• Jung, E. J.; Moon, B. M.; Min, D. J. (2011) Quantitative evaluation for effective removal of phosphorus for SoG-Si. Sol. Energ. Mat. Sol. C., 95 (7): 1779.
   Web of Science ®Google Scholar
• Yoshikawa, T.; Morita, K. (2009) Refining of silicon during its solidification from a Si-Al melt. J. Cryst. Growth, 311 (3): 776.
   Web of Science ®Google Scholar
• Jiang, D. C.; Tan, Y.; Shi, S.; Dong, W.; Gu, Z.; Zou, R. X. (2012) Removal of phosphorus in molten silicon by electron beam candle melting. Mater. Lett., 78: 4.
   Web of Science ®Google Scholar
• Jiang, D. C.; Tan, Y.; Shi, S.; Dong, W.; Gu, Z.; Guo, X. L. (2012) Evaporated metal aluminium and calcium removal from directionally solidified silicon for solar cell by electron beam candle melting. Vacuum, 86: 1417.
   Web of Science ®Google Scholar
• Rousseau, S.; Benmansour, M.; Morvan, D.; Amouroux, J. (2007) Purification of MG silicon by thermal plasma process coupled to DC bias of the liquid bath. Sol. Energ. Mat. Sol. C., 91 (20): 1906.
   Web of Science ®Google Scholar
• Mei, P. R.; Moreira, S. P.; Côrtes, A. D. S.; Marques, F. C. (2012) Purification of metallurgical silicon by horizontal zone melting. Sol. Energ. Mat. Sol. C., 98: 233.
   Web of Science ®Google Scholar
• Anglézio, J. C.; Servant, J. C.; Dubrous, F. (1990) Characterization of metallurgical grade silicon. J. Mater. Res., 5 (9): 1894.
   Web of Science ®Google Scholar
• Santos, I. C.; Goncalves, A. P.; Silva Santos, C.; Almeida, M.; Afonso, M. H.; Joaquina Cruz, M. (1990) Purification of metallurgical grade silicon by acid leaching. Hydrometallurgy, 23: 237.
   Web of Science ®Google Scholar
• Meteleva-Fischer, Y. V.; Yang, Y. X.; Boom, R.; Kraaigveld, B.; Kuntzel, H. (2012) Slag treatment followed by acid leaching as a route to solar-grade silicon. J. Min. Met. Mat. Soc., 64 (8): 957.
   Web of Science ®Google Scholar
• Ma, X. D.; Zhang, J.; Wang, T. M.; Li, T. J. (2009) Hydrometallurgical purification of metallurgical grade silicon. Rare metals, 28 (3): 221.
   Web of Science ®Google Scholar
• He, F. L.; Zheng, S. S.; Chen, C. (2012) The effect of calcium oxide addition on the removal of metal impurities from metallurgical grade silicon by acid leaching. Metall. Mater. Trans. B, 43 (5): 1011.
   Web of Science ®Google Scholar
• Sakata, T.; Miki, T.; Morita, K. (2002) Removal of iron and titanium in poly-crystalline silicon by acid leaching. J. Jap. I. Met., 5: 459.
   Google Scholar
• Morita, K.; Miki, T. (2003) Thermodynamics of solar-grade-silicon refining. Intermetallics, 11 (11–12): 1111.
   Web of Science ®Google Scholar
• Shimpo, T.; Yoshikawa, T.; Morita, K. (2004) Thermodynamic study of the effect of calcium on removal of phosphorus from silicon by acid leaching treatment. Metall. Mater. Trans. B, 35: 277.
   Web of Science ®Google Scholar
• Kawamura, H.; Yanaba, Y.; Yoshikawa, T.; Morita, K. (2013) Reductive removal of phosphorus in silicon using CaO-CaF₂ slag. 142nd TMS Annual Meeting & Exhibition on ‘EPD Congress’, March 3–7, 2013, San Antonio, Texas, p. 229.
   Google Scholar
• Enebakk, E.; Friestad, K.; Tronstad, R.; Zahedi, C.; Dethloff, C. (2011) Silicon feedstock for solar cells. US patent 7931883B2.
   Google Scholar
• Hara, S.; Shibaike, H.; Tarumoto, H.; Ogino, K. (1983) Density and surface tension of CaF2-CaO-SiO2 melts, Proceedings of the first international symposium on molten salt chemistry and technology. Electrochem. Soc. Jap., 257–260.
   Google Scholar
• Mills, K.C.; Courtney, L. (2000) Thermophysical properties of silicon. ISIJ Int., 40 (suppl): 130–138.
   Google Scholar
• Martorano, M. A.; Ferreira Neto, J. B.; Oliveira, T. S.; Tsubaki, T. O. (2011) Refining of metallurgical silicon by directional solidification. Mater. Sci. Eng. B, 176 (3): 217.
   Web of Science ®Google Scholar
• Margarido, F.; Bastos, M. H.; Figueiredo, M. O.; Martins, J. P. (1994) The structural effect on the kinetics of acid leaching refining of Fe-Si alloys. Mater. Chem. Phys., 38 (4): 342.
   Web of Science ®Google Scholar
• Margarido, F.; Martins, J. P.; Figueiredo, M. O.; Bastos, M. H. (1993) Kinetics of acid leaching refining of an industrial Fe-Si alloy. Hydrometallurgy, 34: 1.
   Web of Science ®Google Scholar
• Aydogan, S.; Aras, A.; Canbazoglu, M. (2005) Dissolution kinetics of sphalerite in acidic ferric chloride leaching. Chem. Eng. J., 114: 67.
   Web of Science ®Google Scholar
• Zafar, Z. I.; Ashraf, M. (2007) Selective leaching kinetics of calcareous phosphate rock in lactic acid. Chem. Eng. J., 131: 41.
   Web of Science ®Google Scholar
• Abali,Y.; Bayca, S. U.; Mistincik, E. (2006) Kinetics of oxalic acid leaching of tincal. Chem. Eng. J., 123: 25.
   Web of Science ®Google Scholar
• Levenspiel, O. (1999) Chemical Reaction Engineering, 3rd Ed.; John Wiley & Sons: Hoboken, NJ.
   Google Scholar
• Martins, J. P.; Margarido, F. (1996) The cracking shrinking model for solid-fluid reactions. Mater. Chem. Phys., 44: 156.
   Web of Science ®Google Scholar
• Margarido, F.; Figueiredo, M. O. (1988) Caalsifer: A quaternary Fe-Al-Si-Ca phase isotypic with α-leboite (Fe1-xSi2). Mater. Sci. Eng. A, 104: 249.
   Web of Science ®Google Scholar