Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/10846
Title: Replacement of fluorspar in the desulfurization of hot metal.
Authors: Moreira, Arthur Silva Bahiense
Silva, Carlos Antônio da
Silva, Itavahn Alves da
Issue Date: 2018
Citation: MOREIRA, A. S. B.; SILVA, C. A. da; SILVA, I. A. da. Replacement of fluorspar in the desulfurization of hot metal. REM - International Engineering Journal, Ouro Preto, v. 71, p. 261-267, abr./jun. 2018. Disponível em: <http://www.scielo.br/scielo.php?script=sci_abstract&pid=S2448-167X2018000200261&lng=en&nrm=iso>. Acesso em: 13 fev. 2019.
Abstract: In the steel industry, lime is used as a desulfurizing agent and fluorspar as flux in the hot metal desulfurization process. However there are environmental concerns regarding the use of fluorspar, even when its harmful effects are not fully known. In order to reduce such risks and also to anticipate possible future restrictions, which could undermine the sustainability of steel production, it is proposed to replace the fluorspar for alternative materials in the composition of the desulfurizing lime based mixture. For this purpose new mixtures using aluminum dross, ilmenite, sodalite and ulexite were tested, comparing them with a reference mixture containing fluorspar. The impact of these mixtures on the refractories commonly used in hot metal pretreatment was also checked, since this is an important cost parameter for the steel industries. The laboratory tests showed ulexite as a feasible substitute since the lime (84.03%) – ulexite (10.97%) – graphite (5%) mixture presented the highest desulfurization ratio and low refractory wear (less than the standard fluorspar mixture). The sodalite mixture was the worst by comparison. The ilmenite and aluminum dross mixtures showed similar behavior when compared to the fluorspar mixture.
URI: http://www.repositorio.ufop.br/handle/123456789/10846
ISSN: 18070353
metadata.dc.rights.license: A REM - International Engineering Journal - autoriza o depósito de cópia de artigos dos professores e alunos da UFOP no Repositório Institucional da UFOP. Licença concedida mediante preenchimento de formulário online em: 12 set. 2013.
Appears in Collections:DEMET - Artigos publicados em periódicos

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