ISSN 2594-5300
50° Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos — vol. 50, num.50 (2019)
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Resumo
Brazil is the largest producer of crude steel in the Americas by BOF process and many challenges come along with the increasing market demand. In the BOF, a tubular wall hood structure has been showing premature failures related to the overlay welded tube technology placed in the hood wall. The main root causes were: thermal fatigue at 1800°C, hot spot formation, high heat-affected zone (HAZ) leading to susceptibility of stress cracking, carburizing corrosion and superficial wearing. Based on that, co-extruded tube technology (named composite tube by Sandvik) was the alternative chosen to enhance hood performance without compromising BOF process. In order to rises safety and productivity, composite tube has 100% metallurgical bond assuring stable expansion, high heat exchange efficiency, better corrosion resistance and less rough surface finishing. It was highly suggested to many others mills due to similar and already existing reported cases.
Palavras-chave
BOF Hood; Co-extruded tube; Composite tube
Como citar
Lima, Felipe Beluche;
Santos, Caio Augusto Silva.
ENHANCED PERFORMANCE OF BOF HOOD IN STEEL MILLS WITH COMPOSITE TUBE TECHNOLOGY
,
p. 322-331.
In: 50° Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos,
São Paulo,
2019.
ISSN: 2594-5300
, DOI 10.5151/2594-5300-33535
