Test Results of Crystalline Silicon Melting Process from Briquetted Monocharge Obtained from Microsilica

IF 2.8 4区工程技术 Q2 ENGINEERING, CHEMICAL

Processes Pub Date : 2024-09-05 DOI:10.3390/pr12091911

Alibek Baisanov, Nina Vorobkalo, Yerbol Shabanov, Azat Mussin, Symbat Sharieva, Amir Makishev

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Abstract

Currently, enterprises producing crystalline silicon are facing the formation and accumulation of large volumes of microsilica, a technogenic dusty waste formed during the melting of silicon alloys. Due to its chemical composition, this waste can be a significant raw material for metallurgical production. Therefore, this study is aimed to solve the problem of recycling microsilica. For these studies, a technology for the combined briquetting of microsilica and a carbonaceous reducing agent was developed for the production of a pilot batch of briquettes. This paper presents the results obtained from the process of testing the melting of crystalline (technical) silicon from briquetted monocharge obtained from microsilica. The tests were conducted under large-scale laboratory conditions on a 200 kVA ore-thermal furnace, where 30, 50, and 100% replacements of the traditional charge mixture with briquettes were tested. The results of this study showed that briquettes in the melting process of technical silicon can be successfully used in the range of 0 to 50%. The use of briquettes can significantly improve the technological indicators. The maximum extraction of silicon (approximately 83%) was achieved at 30% replacement. The technical and economic indicators of the process also improved. In particular, an increase in productivity was observed in comparison with tests on a traditional charge.

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从微硅石中获得的块状单质晶体硅熔炼工艺的测试结果

目前，生产晶体硅的企业面临着大量微硅石的形成和积累问题，微硅石是硅合金熔化过程中形成的一种技术性粉尘废物。由于其化学成分，这种废料可以成为冶金生产的重要原料。因此，本研究旨在解决微硅的回收问题。为了进行这些研究，开发了一种将微硅石和碳质还原剂联合压块的技术，用于生产一批试验性压块。本文介绍了从微硅石压块单质中熔炼晶体（工业）硅的测试结果。试验是在大型实验室条件下，在 200 千伏安矿热炉上进行的，用压块对传统炉料混合物进行了 30%、50% 和 100%的替代试验。研究结果表明，在工业硅的熔炼过程中，煤球的使用范围在 0 至 50%之间。使用煤球可以显著改善技术指标。在替代率为 30% 的情况下，硅的萃取率达到最高（约 83%）。工艺的技术和经济指标也得到了改善。特别是，与传统装料试验相比，生产率有所提高。

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

Processes Chemical Engineering-Bioengineering

CiteScore

5.10

自引率

11.40%

发文量

2239

审稿时长

14.11 days

期刊介绍： Processes (ISSN 2227-9717) provides an advanced forum for process related research in chemistry, biology and allied engineering fields. The journal publishes regular research papers, communications, letters, short notes and reviews. Our aim is to encourage researchers to publish their experimental, theoretical and computational results in as much detail as necessary. There is no restriction on paper length or number of figures and tables.