Anais do Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos


ISSN 2594-5300

Título

INCLUSION REMOVAL BY CAO-SIO2-AL2O3-MGO SLAGS IN EXPERIMENTAL CONDITIONS

DOI

10.5151/2594-5300-33655

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Resumo

 

The capacity of steelmaking slags (CaO-SiO2-Al2O3-MgO) on inclusion removal from liquid steel was investigated through experimental conditions. Laboratory experiments with slag and steel samples (with inclusion population known) were performed using a vertical electric resistance furnace at 1600 ºC. After the melting experiments, slag and steel samples were separated and analyzed regarding their chemical composition and inclusion population evolution. The capacity of slags on inclusion removal was evaluated based on the thermodynamics (solid and liquid phases proportion, phase composition and effective viscosity of slags) calculated using the FactSageTM 7.2. Results indicated that changes in the composition of slags (regarding CaO/SiO2 e Al2O3) presented effects on the steel cleanliness. The total inclusion density decreased in all steel samples and the removal of inclusions by slags shows a tendency to improve as their viscosity decreases (< 0.23 Pa.s).

Palavras-chave

Inclusion removal; Steelmaking slags; Computational thermodynamics; FactSage

Como citar

Rocha, Vinicius Cardoso da; Alves, Pedro Cunha; Pereira, Julio Aníbal Morales; Pereira, Augusto Lachini; Bielefeldt, Wagner Viana; Vilela, Antônio Cezar Faria. INCLUSION REMOVAL BY CAO-SIO2-AL2O3-MGO SLAGS IN EXPERIMENTAL CONDITIONS , p. 534-546. In: 50° Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos, São Paulo, 2019.
ISSN: 2594-5300 , DOI 10.5151/2594-5300-33655