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Biomass is a renewable resource that can contribute to decreasing the CO2 emissions of the iron and steel industry. Despite biomass being mainly composed of volatile matters, the potential of this constituent as a reducing agent to the iron oxides has not yet been fully explored. This work investigated the effects of the fundamental parameters on the reduction of iron ore by biomass volatiles as a mean to optimize its use in the ironmaking industry. Experiments with biomass and iron ore placed separately were carried out in an infrared furnace up to 1000ºC at different heating rates, biomass to iron ore ratios and iron ore particle sizes. It was observed that biomass volatiles could effectively reduce iron oxide considering at 1000oC, and wustite, metallic iron and cementite were detected by XRD analysis. It was also identified that the reduction degree was considerably affected by the different parameters tested. Two main reduction steps were identified in the iron ore reduction by biomass volatiles. At low temperatures, the reduction occurred mainly by the non-condensable gases (e.g., CO and H2) from biomass pyrolysis and tar cracking reactions, while from 800oC the reduction was advanced by the carbon deposited on the iron ore particles.
Biomass is a renewable resource that can contribute to decreasing the CO2 emissions of the iron and steel industry. Despite biomass being mainly composed of volatile matters, the potential of this constituent as a reducing agent to the iron oxides has not yet been fully explored. This work investigated the effects of the fundamental parameters on the reduction of iron ore by biomass volatiles as a mean to optimize its use in the ironmaking industry. Experiments with biomass and iron ore placed separately were carried out in an infrared furnace up to 1000ºC at different heating rates, biomass to iron ore ratios and iron ore particle sizes. It was observed that biomass volatiles could effectively reduce iron oxide considering at 1000oC, and wustite, metallic iron and cementite were detected by XRD analysis. It was also identified that the reduction degree was considerably affected by the different parameters tested. Two main reduction steps were identified in the iron ore reduction by biomass volatiles. At low temperatures, the reduction occurred mainly by the non-condensable gases (e.g., CO and H2) from biomass pyrolysis and tar cracking reactions, while from 800oC the reduction was advanced by the carbon deposited on the iron ore particles.
Palavras-chave
Biomass, Pyrolysis, Volatiles, Iron Ore Reduction, Ironmaking
Biomass, Pyrolysis, Volatiles, Iron Ore Reduction, Ironmaking
Como citar
Bagatini, Mauricio Covcevich;
Kan, Tao;
Evans, Tim J.;
Strezov, Vladimir.
INVESTIGATION ON THE FUNDAMENTAL PARAMETERS AFFECTING THE IRON ORE REDUCTION BY BIOMASS PYROLYSIS VOLATILES
,
p. 252-262.
In: 4th EMECR - International Conference on Energy and Material Efficiency and CO2 Reduction in the Steel Industry 2022,
São Paulo,
2022.
ISSN: -
, DOI 10.5151/5463-5463-35089
