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<p>Replacing mineral coal with biochar from malt bagasse is an alternative to reduce the impact of CO<sub>2</sub> emissions and the greenhouse effect in the steel industry. One process in which this biochar can be used is in the pelletization of iron ore, which consists of using ore fines, with coal and additives, to obtain a product that can be used in blast furnaces. In the performance of pellets with partial replacement of coal with malt biochar, the variables in the pellet production were: binary basicity (CaO/SiO<sub>2</sub>), fixed carbon, and coal substitution. The green pellets were subjected to the drop test (2.7–4 drops), the burnt pellets were tested for their drumming index (1.61–17.33&#xa0;wt.%), porosity (23.7–39.6%), and mechanical resistance to compression (31.3–299.4&#xa0;kgf). This route is a promising alternative to reduce the impact of the steel industry on the greenhouse effect by reducing the use of coal and malt waste valorization.</p>

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Clean Carbon Steelmaking: Evaluating the Replacement of Mineral Coal with Malt Biochar in Iron Ore Pelletization

  • 期刊论文

  • 发表日期：

    2025年2月3日

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  • Lucio Rosso Neto,
  • Carolina da Silva Rodrigues,
  • Carlos Henrique Borgert,
  • Vitoria da Silva Silveira,
  • Mateus Milanez,
  • Felipe Fardin Grillo,
  • José Roberto de Oliveira,
  • Danubia Junca Cuzzuol,
  • Tiago Elias Allievi Frizon,
  • Matheus Vinicius Gregory Zimmermann,
  • Eduardo Junca

摘要

Replacing mineral coal with biochar from malt bagasse is an alternative to reduce the impact of CO2 emissions and the greenhouse effect in the steel industry. One process in which this biochar can be used is in the pelletization of iron ore, which consists of using ore fines, with coal and additives, to obtain a product that can be used in blast furnaces. In the performance of pellets with partial replacement of coal with malt biochar, the variables in the pellet production were: binary basicity (CaO/SiO2), fixed carbon, and coal substitution. The green pellets were subjected to the drop test (2.7–4 drops), the burnt pellets were tested for their drumming index (1.61–17.33 wt.%), porosity (23.7–39.6%), and mechanical resistance to compression (31.3–299.4 kgf). This route is a promising alternative to reduce the impact of the steel industry on the greenhouse effect by reducing the use of coal and malt waste valorization.