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


ISSN 2594-5300

Título

DESENVOLVIMENTO DE TIJOLOS DE MgO-C DE ELEVADA ENERGIA DE FRATURA E APLICAÇÕES EM ZONA DE IMPACTO E VENTANEIRAS DE CONVERTEDORES

DEVELOPMENT OF HIGH FRACTURE ENERGY MgO-C BRICKS AND APPLICATIONS TO SCRAP IMPACT ZONE AND BOTTOM TUYERE OF CONVERTER

DOI

10.5151/1982-9345-30178

Downloads

Baixar Artigo 337 Downloads

Resumo

In this article, the technologies of highly durable MgO-C bricks for the scrap impact zone and bottom blowing tuyere of converters are demonstrated. On the bases of our recent investigations, wear of scrap impact zone and bottom tuyere are explainable in terms of crack initiation and propagation. Theoretically, crack propagation in brittle material is regarded as generation of new crack surface area. It occurs when the elastic strain energy stored in the material exceeds the energy required to generate a new crack surface area. Since the overall energy consumed for crack propagation until fracture is evaluated by fracture energy, materials exhibiting high fracture energy can be regarded as materials with high fracture resistance. Therefore, two fracture energy-improving technologies for MgO-C bricks were developed. One is matrix reinforcement and the other is carbon bond enhancement. These technologies were applied to bricks for the scrap impact zone and bottom tuyere. As a result of commercial applications, notable decreases in wear rates were recognized for high fracture energy materials for the scrap impact zone and bottom blowing tuyere of converters.

 

Palavras-chave

Conversor, zona de impacto de sucata, ventaneiras, energia de fratura

Converter, Scrap impact zone, Bottom blowing tuyere, Fracture energy

Como citar

Fujiyoshi, Ryoma; Iida, Masakazu; Iida, Atsuhisa; Torigoe, Atushi. DESENVOLVIMENTO DE TIJOLOS DE MgO-C DE ELEVADA ENERGIA DE FRATURA E APLICAÇÕES EM ZONA DE IMPACTO E VENTANEIRAS DE CONVERTEDORES , p. 107-116. In: 48º Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos, São Paulo, 2017.
ISSN: 2594-5300 , DOI 10.5151/1982-9345-30178