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<p>As a renewable and clean energy source, biomass demonstrates increasingly significant application potential in iron and steel metallurgy. Based on Fluent numerical simulation, this study elucidates the mechanisms of biomass injection processes under oxygen-enriched conditions through comparative analysis of velocity field distributions, temperature field distributions, and component concentration field distributions in jet regions across three scenarios: anthracite (oxygen-free injection), sawdust (oxygen-free injection), and sawdust (oxygen injection). The research reveals that in high-temperature oxygen-enriched condition, sawdust biomass undergoes synergistic reactions including carbonization, volatile combustion, and fixed carbon gasification, generating biochar and reductive gas (CO/H<sub>2</sub>). Compared to oxygen-free conditions, oxygen supplementation enhances both velocity and temperature in the jet core region, while intensifying the reducing atmosphere through CO<sub>2</sub>/H<sub>2</sub>O gasification reactions with biochar. The biomass pyrolysis occurs due to the high temperatures resulting from oxygen injection, which enables the online preparation of biochar during the injection process. This approach not only facilitates slag foaming and reduction but also enhances biomass utilization efficiency. Furthermore, it contributes to the reduction of production costs and energy consumption, while promoting the green and low-carbon transformation of short-process steelmaking in electric arc furnace.</p>

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Numerical Simulation of Online Preparation of Biomass-Based EAF Steelmaking Foaming Agents Based on Gas–Solid Injection

  • 期刊论文

  • 发表日期：

    2025年7月25日

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  • Qisheng Wang,
  • Guangsheng Wei,
  • Chengjin Han,
  • Chao Feng,
  • Rong Zhu

摘要

As a renewable and clean energy source, biomass demonstrates increasingly significant application potential in iron and steel metallurgy. Based on Fluent numerical simulation, this study elucidates the mechanisms of biomass injection processes under oxygen-enriched conditions through comparative analysis of velocity field distributions, temperature field distributions, and component concentration field distributions in jet regions across three scenarios: anthracite (oxygen-free injection), sawdust (oxygen-free injection), and sawdust (oxygen injection). The research reveals that in high-temperature oxygen-enriched condition, sawdust biomass undergoes synergistic reactions including carbonization, volatile combustion, and fixed carbon gasification, generating biochar and reductive gas (CO/H2). Compared to oxygen-free conditions, oxygen supplementation enhances both velocity and temperature in the jet core region, while intensifying the reducing atmosphere through CO2/H2O gasification reactions with biochar. The biomass pyrolysis occurs due to the high temperatures resulting from oxygen injection, which enables the online preparation of biochar during the injection process. This approach not only facilitates slag foaming and reduction but also enhances biomass utilization efficiency. Furthermore, it contributes to the reduction of production costs and energy consumption, while promoting the green and low-carbon transformation of short-process steelmaking in electric arc furnace.