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<p>Converter steel slag is a significant byproduct of the steel industry, characterized by its challenging processing and substantial usage value. The carbon thermal reduction process for removing phosphorus from steel slag and returning the reduced slag into the converter can significantly diminish the total amount of steel slag, aiding the steel industry’s shift towards environmentally friendly, low-carbon, high-quality, and sustainable development. The study uses the combination of theoretical research, simulation calculations, and laboratory hot-state experiments to process converter steel slag <i>via</i> the carbon thermal reduction method. This study examines the chemical composition, physical phases, and mineral morphology of slag pre- and post-reduction, monitors the phosphorus movement within the slag, and systematically explores the influence of reaction temperature on the carbon thermal reduction of steel slag. The experiment results show that, within the experimental parameters, increasing reaction temperature improves phosphorus removal proportion. Holding at a temperature of 1873&#xa0;K for 30&#xa0;minutes results in an optimal phosphorus removal proportion of 79.61&#xa0;pct. Increased reaction temperatures markedly decrease apparent viscosity, enhance kinetic conditions, and dramatically increase phosphorus removal proportion. Slag processed using this method can be repurposed in converters, facilitating the resource usage of converter steel slag.</p>

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Effect of Reaction Temperature on Carbothermal Reduction Behavior of P-Bearing Steelmaking Slag

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Cheng-yu Bi,
  • Xin Liu,
  • Xian-hua Liu,
  • Yan-ping Bao

摘要

Converter steel slag is a significant byproduct of the steel industry, characterized by its challenging processing and substantial usage value. The carbon thermal reduction process for removing phosphorus from steel slag and returning the reduced slag into the converter can significantly diminish the total amount of steel slag, aiding the steel industry’s shift towards environmentally friendly, low-carbon, high-quality, and sustainable development. The study uses the combination of theoretical research, simulation calculations, and laboratory hot-state experiments to process converter steel slag via the carbon thermal reduction method. This study examines the chemical composition, physical phases, and mineral morphology of slag pre- and post-reduction, monitors the phosphorus movement within the slag, and systematically explores the influence of reaction temperature on the carbon thermal reduction of steel slag. The experiment results show that, within the experimental parameters, increasing reaction temperature improves phosphorus removal proportion. Holding at a temperature of 1873 K for 30 minutes results in an optimal phosphorus removal proportion of 79.61 pct. Increased reaction temperatures markedly decrease apparent viscosity, enhance kinetic conditions, and dramatically increase phosphorus removal proportion. Slag processed using this method can be repurposed in converters, facilitating the resource usage of converter steel slag.