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An overview of ladle free open performance atArcelorMittal Brasil Monlevade

Published online by Cambridge University Press:  09 April 2008

F. -A.-M. Morais ,
J.-G. Costa Neto ,
E.-A. Amaral ,
L.-V. Penna ,
M.-A. Bosco ,
J.-G. Ramalho  and
A.-E. Almeida
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Abstract

ArcelorMittal Monlevade is an integrated plant with sinter plant,blast furnace, BOF, ladle furnace, continuous caster, and rolling mill,with a capacity of 1.2 million tpy. During the last years, Monlevadehas been raising the ladle free open index through refractory qualityimprovement and standardization of operational parameters. The mainactions were changing of the geometry of ladle well block and nozzle,use of two-layer sand, and control of sand residence time before BOFtapping. Based on these facts, the ladle free open index has increasedfrom 98.5 to 99.8% from 2002 to 2006.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 105 , Issue 3: Blast FurnaceSteelmakingHot RollingSteel Use , March 2008 , pp. 115 - 120
Copyright
© La Revue de Métallurgie, 2008

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