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Influence of Industrial Wastes and Different Fluxes on Hot Metal Desulfurization Efficiency

  • Pyrometallurgical Processing of Secondary Resources
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Abstract

The use of recycled wastes and fluxing agents in hot metal desulfurizing mixtures aims to recover potential abilities from residues and to improve the reaction kinetics. Therefore, this work’s aim is to propose calcitic lime partial replacement by limestone waste and slag from desulfurization in the Kambara Reactor. Likewise, it is proposed that fluorspar (CaF2) is replaced by boron oxide (B2O3), sodalite and aluminum dross. Experimental tests were carried out in a resistance furnace at 1350°C in an inert atmosphere with constant stirring. Simulations were carried out with the FactSage software in order to obtain the phases present in each mixture at the working temperature. The most efficient mixtures formed a liquid phase above 20 wt.%, indicating that the dissolved CaO also desulfurizes hot metal. Limestone waste and the fluxes generated a positive effect on the desulfurization kinetics. It was possible to develop an empirical parameter called the global desulfurization factor (FGDeS).

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Acknowledgements

Thanks to Coordenação de Aperfeiçoamento de Pessoal de nível Superior, Fundação de Amparo à Pesquisa e Inovação do Espírito Santo, Conselho Nacional de Desenvolvimento Científico e Tecnológico, and Programa de Pós-Graduação em Engenharia Metalúrgica e de Materiais for technical and laboratory support.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering (PROPEMM), Federal Institute of Education, Science and Technology of Espírito Santo (IFES), Vitória, 29040-780, Brazil

    Elton Volkers do Espírito Santo, Silas Gambarine Soares, Heitor Cristo Clem de Oliveira, Felipe Fardin Grillo & José Roberto de Oliveira

  2. Department of Materials Science and Engineering (PPGCEM), Universidade do Extremo Sul Catarinense (UNESC), Criciúma, 88806-000, Brazil

    Eduardo Junca

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  1. Elton Volkers do Espírito Santo
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  2. Silas Gambarine Soares
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Correspondence to Elton Volkers do Espírito Santo.

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do Espírito Santo, E.V., Soares, S.G., de Oliveira, H.C.C. et al. Influence of Industrial Wastes and Different Fluxes on Hot Metal Desulfurization Efficiency. JOM 73, 1909–1918 (2021). https://doi.org/10.1007/s11837-021-04673-3

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  • DOI: https://doi.org/10.1007/s11837-021-04673-3

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