ISSN 2594-5300
33º Seminário de Aciaria — Vol. 01 , num. 33 (2002)
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Abstract
The wear process of refractories in service is produced by physical and chemical causes linked to refractory quality, installation and steelmaking process. In order to reduce the impact of the BOF operation on the refractory lining, the application of MgO saturated coating slags is required. These slags form a protective layer on the MgO – C bricks enhancing lining life. The slag fluidity, the physics and chemistry of the refractory-slag interaction are relevant to the design of these coating slags. The blowing practice, the end of blow temperature, the ratio of solid to liquid phases in the slag, its morphology, its particle size and chemistry are determining factors for the required properties. The slag – refractory adherence mechanisms are analyzed by dipping test and also post mortem samples are studied using light and electronic microscopy. Slag fluidity measurements at high temperature, up to 1700 °C, are reported for slags with different FeO content. The results obtained by capillary method and inclined plane technique are compared with theoretical models.
The wear process of refractories in service is produced by physical and chemical causes linked to refractory quality, installation and steelmaking process. In order to reduce the impact of the BOF operation on the refractory lining, the application of MgO saturated coating slags is required. These slags form a protective layer on the MgO – C bricks enhancing lining life. The slag fluidity, the physics and chemistry of the refractory-slag interaction are relevant to the design of these coating slags. The blowing practice, the end of blow temperature, the ratio of solid to liquid phases in the slag, its morphology, its particle size and chemistry are determining factors for the required properties. The slag – refractory adherence mechanisms are analyzed by dipping test and also post mortem samples are studied using light and electronic microscopy. Slag fluidity measurements at high temperature, up to 1700 °C, are reported for slags with different FeO content. The results obtained by capillary method and inclined plane technique are compared with theoretical models.
Keywords
slag, adherence, refractory, converter lining, MgO-C bricks
slag, adherence, refractory, converter lining, MgO-C bricks
How to cite
Camelli, Silvia; Brandaleze, Elena; Madias, Jorge; Topolevsky, Raul.
PROTECTION OF CONVERTER LINING WITH SLAG ADHERENCE MECHANISMS,
p. 141-150.
In: 33º Seminário de Aciaria,
São Paulo, Brasil,
2002.
ISSN: 2594-5300, DOI 10.5151/2594-5300-C01783
