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Proceedings of the Seminar on Steelmaking, Casting and Non-Ferrous Metallurgy

ISSN 2594-5300

49° Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos — vol. 49, num.49 (2018)

Title

COMPARISON OF THE VARIOUS CAVITY DEPTH OR JET PENETRATION INDEX FORMULAE FOR BLOWING IN A BOF WITH BOTTOM STIRRING

COMPARISON OF THE VARIOUS CAVITY DEPTH OR JET PENETRATION INDEX FORMULAE FOR BLOWING IN A BOF WITH BOTTOM STIRRING

Authorship

Maia, Breno Totti; Tavares, Roberto Parreiras; Balajee , Shank; Cappel, Juergen

Maia, Breno Totti
Maia, Breno Totti

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Tavares, Roberto Parreiras
Tavares, Roberto Parreiras

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Balajee , Shank
Balajee , Shank

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Cappel, Juergen
Cappel, Juergen

I am this author

DOI

10.5151/1982-9345-31133

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Abstract

Several equations are developed over the years to calculate the penetration depth L of the Oxygen jet generated by the blowing lance for BOF/LD converters and similar processes. The penetration depth L for a given lance tip is primarily impacted by the lance height (gap), the oxygen flow rate and the resulting Oxygen jet momentum. Considering a dimensionless parameter L/Lo, where Lo is the liquid steel bath height, this paper will critically review both the theoretical and practical aspects of these depths of penetration equations, and recommend the most feasible equation(s) to determine the lance gap to use during the oxygen blow. This paper reviews how to translate the L/L0 in comparison with authors and yours considerations about nozzles parameters with respect to lance stirring, bottom stirring and slag layer patterns.

 

Several equations are developed over the years to calculate the penetration depth L of the Oxygen jet generated by the blowing lance for BOF/LD converters and similar processes. The penetration depth L for a given lance tip is primarily impacted by the lance height (gap), the oxygen flow rate and the resulting Oxygen jet momentum. Considering a dimensionless parameter L/Lo, where Lo is the liquid steel bath height, this paper will critically review both the theoretical and practical aspects of these depths of penetration equations, and recommend the most feasible equation(s) to determine the lance gap to use during the oxygen blow. This paper reviews how to translate the L/L0 in comparison with authors and yours considerations about nozzles parameters with respect to lance stirring, bottom stirring and slag layer patterns.

Keywords

BOF/LD Converter, penetration depth L; liquid steel bath height L0; lance height; oxygen flow rate

BOF/LD Converter, penetration depth L; liquid steel bath height L0; lance height; oxygen flow rate

How to refer

Maia, Breno Totti; Tavares, Roberto Parreiras; Balajee , Shank; Cappel, Juergen. COMPARISON OF THE VARIOUS CAVITY DEPTH OR JET PENETRATION INDEX FORMULAE FOR BLOWING IN A BOF WITH BOTTOM STIRRING , p. 147-158. In: 49° Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos, São Paulo, 2018.
ISSN: 2594-5300 , DOI 10.5151/1982-9345-31133