英文论文
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文献类型
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Journal article (JA)
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题名
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Extraction of phosphorus from metallurgical grade silicon using a combined process of Si-Al-Ca solvent refining and CaO-CaF2 slag treatment
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作者
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Zhang, Chentong; Lai, Huixian; Zhang, Yaohao; Sheng, Zhilin; Li, Jintang; Xing, Pengfei; Luo, Xuetao
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作者单位
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[Zhang, Chentong; Lai, Huixian; Zhang, Yaohao; Li, Jintang; Luo, Xuetao] Xiamen Univ, Coll Mat, Xiamen 361005, Fujian, Peoples R China. [Sheng, Zhilin] Beifang Univ Nationalities, Sch Mat Sci & Engn, Yinchuan 750021, Peoples R China. [Xing, Pengfei] Northeastern Univ, Sch Mat & Met, Shenyang 110004, Liaoning, Peoples R China.
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通讯作者地址
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Xiamen Univ, Coll Mat, Xiamen 361005, Fujian, Peoples R China.
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Email
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xuetao@xmu.edu.cn
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ResearchID
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ORCID
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期刊名称
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Separation and Purification Technology
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出版社
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Elsevier B.V.
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ISSN
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1383-5866
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出版信息
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2020-02-01, 232:-.
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JCR
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2
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影响因子
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7.312
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ISBN
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基金
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National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51334004]
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会议名称
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会议地点
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会议开始日期
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会议结束日期
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关键词
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Aluminum alloys; Calcium fluoride; Chlorine compounds; Efficiency; Extraction; Fluorspar; Leaching; Mass transfer; Metallurgy; Refining; Silicon alloys; Slags; Solvents
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摘要
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A combined purification process of Si-Al-Ca solvent refining and CaO-CaF2 slag treatment was investigated with a focus on removing phosphorus (P) from metallurgical-grade Si (MG-Si). The primary precipitates in the slag treated Si-Al-Ca alloy are CaAl2Si2 and CaSi2, and these precipitates can be eliminated via leaching with HCl + CH3COOH and HCl + HF in sequence. Compared to MG-Si, a higher extraction efficiency of P was achieved with Si-Al-Ca alloy after CaO-CaF2 slag treatment. Influences of alloy composition, slag components, and operation parameter on the P removal efficiency were studied systematically. The optimal dephosphorization efficiency reached 98.6% when the 70%Si-Al-Ca alloy was treated with 20%CaO-80%CaF2 slag twice. Furthermore, the mechanism of P removal using the combined process was studied. The results indicate that the Si-Al-Ca solvent refining causes the segregation coefficient of P to be lower, thus facilitating its mass transfer in slag treatment. A large amount of P was reduced and then diffused to the slag phase in the slag experiment. Residual P in the slag-treated alloy was trapped by the CaAl2Si2 phase and was then removed via acid leaching.
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一级学科
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Engineering, Chemical
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WOS入藏号
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WOS:000488657200002
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EI收录号
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20193407354122
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DOI
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10.1016/j.seppur.2019.115954
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ESI
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CHEMISTRY
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收录于
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SCIE, EI
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