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<p>As the most widely utilized reducing agent, the physicochemical properties of coal significantly influence the production efficiency of Metallurgical-Grade Silicon (MG-Si). Due to the complexity of coal, it is currently difficult to effectively screen and efficiently utilize MG-Si coals. This study investigated the reactivity, pore structure, and molecular structure of two types of coal employed in MG-Si production. Results showed that the aromaticity of LC(low-efficiency coal) was 10% higher than that of HC(high-efficiency coal). Additionally, LC1600(LC after high temperature treatment at 1600&#xa0;°C) had a higher degree of graphitization compared to HC1600(HC after high temperature treatment at 1600&#xa0;°C).The HC1600 and LC1600 had 71.4% and 16.4% of their respective pore sizes larger than 0.3&#xa0;μm. As a result, HC demonstrated greater reactivity at elevated temperatures compared to LC. The finding systematically elucidated the effect of molecular structure on the transformation of coal physicochemical properties, providing insight into reductant selection in the preparation of in MG-Si production.</p>

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The Effect of Molecular Structure on the Physicochemical Properties Transformation of Coal in the MG-Si Production

  • 期刊论文

  • 发表日期：

    2025年7月30日

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  • Zhouyuntian Du,
  • Kuixian Wei,
  • Chen Xu,
  • Xiaocong Deng,
  • Wenhui Ma

摘要

As the most widely utilized reducing agent, the physicochemical properties of coal significantly influence the production efficiency of Metallurgical-Grade Silicon (MG-Si). Due to the complexity of coal, it is currently difficult to effectively screen and efficiently utilize MG-Si coals. This study investigated the reactivity, pore structure, and molecular structure of two types of coal employed in MG-Si production. Results showed that the aromaticity of LC(low-efficiency coal) was 10% higher than that of HC(high-efficiency coal). Additionally, LC1600(LC after high temperature treatment at 1600 °C) had a higher degree of graphitization compared to HC1600(HC after high temperature treatment at 1600 °C).The HC1600 and LC1600 had 71.4% and 16.4% of their respective pore sizes larger than 0.3 μm. As a result, HC demonstrated greater reactivity at elevated temperatures compared to LC. The finding systematically elucidated the effect of molecular structure on the transformation of coal physicochemical properties, providing insight into reductant selection in the preparation of in MG-Si production.