INORGANIG MATERIALS AND CERAMIC MATRIX COMPOSITES |
|
|
|
|
|
Effect of FeSi2Ti Phase Reconstruction on Acid Leaching Behavior of Impurity Elements in Metallurgical Grade Silicon |
LAI Huixian1, CAI Huaxian2, MENG Jinshui2, SHENG Zhilin3, ZHANG Yaohao1, LUO Xuetao1
|
1 Fujian Key Laboratory of Advanced Materials, College of Materials, Xiamen University, Xiamen 361005 2 Shangnan Zhongjian Industrial Co. Ltd., Shangnan 726300 3 School of Material Science and Engineering, Beifang University of Nationalities,Yinchuan 750021 |
|
|
Abstract To strengthen acid leaching in purifying metallurgical grade silicon for solar cell applications, a novel phase reconstruction technology was proposed by Si-Fe-Ti solvent refining with forming FeSi2Ti phase. It was found that the main precipitated phases were transferred from Si-Fe-Al, Si-Al-Fe and Si-Ti-Fe in metallurgical grade silicon to FeSi2Ti, Si-Ti-Fe(τ5) and Si-Fe-Al in Si-Fe-Ti alloy after Si-Fe-Ti solvent refining. By appl-ying acid etching technology, HCl+HF mixture was found as an effective lixiviant for dissolving the precipitated phases in both metallurgical grade silicon and its Si-Fe-Ti alloy. And the leaching behavior of the precipitated phases strongly depended on the composition of the major impurity elements. The impurity removal efficiency of acid leaching of metallurgical grade silicon was efficiently improved after Si-Fe-Ti solvent refining, especially for Mn, Ni, V and Cu. The purity of metallurgical grade silicon could be improved from 99.74% to 99.97% after once leaching Si-Fe-Ti alloy.
|
Published: 16 May 2019
|
|
Fund:This work was financially supported by Shaanxi Province “Inorganic High Purity Silicon Material Industry Innovation Chain” Science and Technology Project (2017TSCXL-GY-06-02). |
About author:: Huixian Lai, received his doctorate degree in College of Materials from Xiamen University in Sept. 2012—Jul. 2018. During this period, he has published more than 20 papers, including seven as the first author, owned one authorized national patent. Meanwhile, He has participated in three national natural funds and provincial key fund projects. Xuetao Luo, born in February 1964, professor, doctoral supervisor, associate dean of materials college. In March 1996, he graduated from the Northwestern Polytechnical University with a doctorate in engineering. In July 1999, he was promoted to a professorship in a special way, and was awarded the state council government subsidy. In 2005, he was appointed as a doctoral supervisor. Currently, he is the director of the national metallurgical law solar polysilicon industrial technology innovation alliance and the AD hoc committee of several international metallurgical journals. He researches on slag refining, vacuum dephosphorization, plasma deboron removal, and directional solidification dehybridization has been carried out, which has accumulated abundant experimental experience and theoretical basis for the preparation of solar polysilicon by metallurgy. |
|
|
1 Masson G, Latour M, Rekinger M, et al. Globle market outlook for photovoltaics, Brussels: European Photovoltaic Industry Association, 2013. 2 Li C Y, Zhao L X, Wang Z, et al.Chinese Journal of Nonferrous Metals,2011,21(8),1988(in Chinese). 李成义, 赵立新, 王志, 等.中国有色金属学报, 2011, 21(8),1988. 3 Zhang J X, Xu J Q, Zhou J M, et al. Ordnance Material Science and Engineering,2015(1),40(in Chinese). 张济祥, 许金泉, 周京明, 等. 兵器材料科学与工程, 2015(1),40. 4 Lai H X, Li J T, Xing P F, et al. Separation and Purification Technology,2018,191,257. 5 Hu L, Wang Z, Gong X Z, et al.Metallurgical and Materials Transactions B, 2013,44(4),828. 6 Lai H X, Huang L Q, Lu C H, et al.JOM, 2016,68(9),2371. 7 Fang M, Lu C H, Huang L Q, et al.Industrial & Engineering Chemistry Research,2014,53(30), 12054. 8 Gan C H, Zeng X, Fang M, et al.Journal of Crystal Growth, 2015,426(15),202. 9 Martorano M A, Neto J B F, Oliveira T S, et al. Materials Science and Engineering: B, 2011,176(3),217. 10 Tan Y, Guo X L, Shi S, et al.Vacuum, 2013,92,65. 11 Jiang D C, Tan Y, Shi S, et al.Materials Letters, 2012,78,4. 12 Delannoy Y, Alemany C, Li K I, et al. Solar Energy Materials and Solar Cells, 2002,72(1-4),69. 13 Nakamura N, Baba H, Sakaguchi Y, et al.Materials Transactions, 2004,45(3),858. 14 Tucker N P.Journal of Iron and Steel Industry,1927,15,412. 15 Santos I C,Goncalves A P, Santos C S, et al.Hydrometallurgy, 1990,23(2-3),237. 16 Zhang H,Wang Z,Ma W H,et al.Industrial & Engineering Chemistry Research, 2013,52(22),7289. 17 Lai H X,Huang L Q,Gan C H,et al.Hydrometallurgy, 2016,164,103. 18 Lai H X,Huang L Q,Xiong H P, et al. Industrial & Engineering Chemistry Research,2017,56(1),311. 19 Zhao L X,Wang Z,Guo Z C,et al.Transactions of Nonferrous Metals Society of China,2011,21(5),1185. 20 Murray D Johnston,Leili Tafaghodi Khajavi,Mark Li, et al.JOM,2012,64(8),935. 21 Yoshikawa T, Morita K. Science and Technology of Advanced Materials,2003,4(6),531. 22 Yoshikawa T,Morita K. Journal of Crystal Growth,2009,311(3),776. 23 Yoshikawa T,Morita K.Metall and Materials Transactions B,2005,36(6),731. 24 Yulia V Meteleva Fischer,Yang Y X,Rob Boom,et al. Mineral Processing and Extractive Metallurgy, 2013, 122(4),229. 25 Yulia V Meteleva Fischer,Yang Y X,Rob Boom,et al. JOM, 2012,64(8),957. 26 Yulia V Meteleva Fischer, Yang Y X,Rob Boom,et al. Intermetallics, 2012,25,9. 27 Raghavan V.Journal of Phase Equilibria and Diffusion, 2009,30,393. 28 Gribov B G, Zinovev K V. Inorganic Materials,2003,39(7),653. 29 Hopkins R H, Rohatgi A. Journal of Crystal Growth,1986,75(1),67. 30 He F L, Zheng S S, Chen C. Metallurgical and Materials Transactions B, 2012,43(5),1011. 31 Margarido F, Figueiredo M O, Queiroz A M, et al. Industrial & Enginee-ring Chemistry Research,1997,36(12), 5291. 32 Dietl J. Solar Cells, 1983,10(2),145. |
|
|
|