Comparative study on removal of metallurgical silicon impurities by different acid leaching methods

IF 1.3 4区工程技术 Q4 CHEMISTRY, PHYSICAL

Physicochemical Problems of Mineral Processing Pub Date : 2023-03-17 DOI:10.37190/ppmp/162331

Zijie Gao, D. Luo

引用次数: 0

Abstract

Hydrometallurgy is considered a promising method to produce solar-grade silicon (SOG-Si) from metallurgical-grade silicon (MG-Si) due to its advantages of low cost, simple operation, and easy control. In this paper, the effects of particle size of MG-Si, type of acid, leaching time, temperature, and liquid-to-solid ratio on the purification efficiency were investigated in an external field environment with the addition of ultrasound. The purification efficiencies of the two acid-leaching methods were compared. It was found that the simultaneous use of HCl + HNO3 was more effective than using only HCl for impurity removal in MG-Si: the extraction efficiencies of impurities Fe and Al were increased by 2.2% and 13.4%, respectively. The impurity contents in MG-Si before and after calcination pretreatment were also compared. This paper is expected to help researchers select the appropriate hydrometallurgical technique to reduce the impurity content in MG-Si.

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不同酸浸法去除冶金硅杂质的比较研究

湿法冶金以其成本低、操作简单、易于控制等优点，被认为是一种由冶金级硅生产太阳能级硅的有前途的方法。在外加超声波的外场环境中，研究了MG-Si的粒度、酸的类型、浸出时间、温度和液固比对纯化效率的影响。比较了两种酸浸法的净化效果。研究发现，同时使用HCl+HNO3比仅使用HCl去除MG-Si中的杂质更有效：杂质Fe和Al的萃取效率分别提高了2.2%和13.4%。比较了煅烧预处理前后镁硅中杂质的含量。本文旨在帮助研究人员选择合适的湿法冶金技术来降低镁硅中的杂质含量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physicochemical Problems of Mineral Processing CHEMISTRY, PHYSICAL-MINING & MINERAL PROCESSING

自引率

6.70%

发文量

期刊介绍： Physicochemical Problems of Mineral Processing is an international, open access journal which covers theoretical approaches and their practical applications in all aspects of mineral processing and extractive metallurgy. Criteria for publication in the Physicochemical Problems of Mineral Processing journal are novelty, quality and current interest. Manuscripts which only make routine use of minor extensions to well established methodologies are not appropriate for the journal. Topics of interest Analytical techniques and applied mineralogy Computer applications Comminution, classification and sorting Froth flotation Solid-liquid separation Gravity concentration Magnetic and electric separation Hydro and biohydrometallurgy Extractive metallurgy Recycling and mineral wastes Environmental aspects of mineral processing and other mineral processing related subjects.