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投稿时间:2024-04-23 修订日期:2024-06-04
投稿时间:2024-04-23 修订日期:2024-06-04
中文摘要: 在高温下利用密度差别,以熔硅、熔渣和熔铁(或铜)构建Si/Slag/Me三层液体系。冶金硅中的B和P杂质扩散到熔渣和底层金属中,达到提纯冶金硅的目的。热力学计算结果证明了这种方法具有可行性。实验研究分析了底层金属类型、炉渣成分及反应温度对B和P去除率的影响,结果表明:底层金属可有效吸收冶金硅中的P,其中铁比铜有更好的P吸收效果。底层金属对B的吸收效果不佳,B的去除主要归功于造渣提纯过程。在炉渣中加入10 wt%的CaF2,降低了渣粘度,可显著提高B和P的去除率。1600~1700 °C温度范围内,提高反应温度有利于B的去除,对P的去除无显著作用。
Abstract:A new refining concept aims to remove both B and P simultaneously in silicon has been proposed in Si/Slag/Me (Me: Fe or Cu) system. Both liquid Si and liquid Fe/Cu phases are separated by the molten slag phase spontaneously based on their physicochemical properties. Equilibrium evaluations indicate that both the B and P, the most difficult impurities to be removed from ultra-pure silicon, can be redistributed to the slag and another metal phase. It is experimentally shown that the simultaneous removal of both B and P by a single metallurgical refining process is possible by three-layer refining. The metal phase plays an P impurity collector role in the system, but has little effect on B adsorptions. Liquid Fe works better than the molten Cu for P adsorptions. Addition of CaF2 to the binary CaO-SiO2 slag increase significantly the remove rates of B and P, due to CaF2 can reduce the viscosity of slag. Increasing temperature from 1600 °C to 1700 °C improves the B remove rate significantly, but has little effect on P remove.
文章编号:YSJSGC20240275 中图分类号:TK154 文献标志码:
基金项目:江苏省博士后科研资助计划项目(2021K180B); 泰州市科技支撑计划项目(TS202202); 江苏大学高级人才科研启动基金(18JDG015)
作者 | 单位 | |
李翔* | 江苏大学 | xiangli@ujs.edu.cn |
袁亮 | 江苏大学能源与动力工程学院 | |
李克帆 | 江苏大学 | likefan@stmail.ujs.edu.cn |
纪睿 | 江苏大学 | |
展亦馨 | 江苏大学 | |
唐恺 | 挪威科技工业研究院 |
引用文本:
李翔,袁亮,李克帆,纪睿,展亦馨,唐恺.三层液精炼法提纯多晶硅的研究[J].有色金属工程,2024,(10):67-72.
李翔,袁亮,李克帆,纪睿,展亦馨,唐恺.三层液精炼法提纯多晶硅的研究[J].有色金属工程,2024,(10):67-72.