Title

EVALUATION OF SLAG SPLASHING PROCESS IN BOF VIA PHYSICAL MODELING

EVALUATION OF SLAG SPLASHING PROCESS IN BOF VIA PHYSICAL MODELING

Authorship

MATOS, WERNER AREDES; BORGES, RONALDO ADRIANO ALVARENGA; JUNIOR, JOAO DOMINGOS GUIMARAES DE ATHAYDE; MAIA, BRENO TOTTI

MATOS, WERNER AREDES

I am this author

BORGES, RONALDO ADRIANO ALVARENGA

I am this author

JUNIOR, JOAO DOMINGOS GUIMARAES DE ATHAYDE

I am this author

MAIA, BRENO TOTTI

I am this author

DOI

10.5151/2594-5300-41594

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Abstract

THE SEARCH TO INCREASE THE REFRACTORY LINING LIFE, REDUCE COST IN THE PRODUCTION PROCESS, AND ENVIRONMENTAL BENEFITS MAKE THE SLAG SPLASHING AN EFFECTIVE TECHNIQUE IN THE PREVENTIVE REPAIR OF THE LINING. THE COMPLEXITY OF THE INDUSTRIAL OPERATION MAKES PHYSICAL MODELING AN ALTERNATIVE FOR PROCESS EVALUATION. IN THE PRESENT STUDY THE PARAMETERS LANCE HEIGHT, GAS FLOW RATE, AMOUNT AND VISCOSITY OF SLAGS WERE EVALUATED, VIA 1:10 SCALE MODEL OF BOF. THE SPLASH INDEX WAS QUANTIFIED IN TOTALITY AND BY BOF ZONES. THE RESULTS SHOWED THAT THE SPLASH INDEX DEPENDS ON THE INTERACTION MODES OF THE IMPINGEMENT JET WITH THE LIQUID. IT WAS NOTED A DIRECT RELATION BETWEEN INERTIAL AND GRAVITATIONAL FORCES WITH THE SPLASH INDEX. EVEN THOUGH, THE INTERFACIAL AND VISCOUS FORCES CAN NOT BE NEGLECTED. THE BEST CONFIGURATION FOR SPLASH INDEX RESULTS WERE FLOW RATE 70 NM³/H, LANCE DISTANCE TO THE BOTTOM 400 MM AND AMOUNT OF SLAG 12%.

THE SEARCH TO INCREASE THE REFRACTORY LINING LIFE, REDUCE COST IN THE PRODUCTION PROCESS, AND ENVIRONMENTAL BENEFITS MAKE THE SLAG SPLASHING AN EFFECTIVE TECHNIQUE IN THE PREVENTIVE REPAIR OF THE LINING. THE COMPLEXITY OF THE INDUSTRIAL OPERATION MAKES PHYSICAL MODELING AN ALTERNATIVE FOR PROCESS EVALUATION. IN THE PRESENT STUDY THE PARAMETERS LANCE HEIGHT, GAS FLOW RATE, AMOUNT AND VISCOSITY OF SLAGS WERE EVALUATED, VIA 1:10 SCALE MODEL OF BOF. THE SPLASH INDEX WAS QUANTIFIED IN TOTALITY AND BY BOF ZONES. THE RESULTS SHOWED THAT THE SPLASH INDEX DEPENDS ON THE INTERACTION MODES OF THE IMPINGEMENT JET WITH THE LIQUID. IT WAS NOTED A DIRECT RELATION BETWEEN INERTIAL AND GRAVITATIONAL FORCES WITH THE SPLASH INDEX. EVEN THOUGH, THE INTERFACIAL AND VISCOUS FORCES CAN NOT BE NEGLECTED. THE BEST CONFIGURATION FOR SPLASH INDEX RESULTS WERE FLOW RATE 70 NM³/H, LANCE DISTANCE TO THE BOTTOM 400 MM AND AMOUNT OF SLAG 12%.

Keywords

Slag splashing, Basic oxygen furnace, Physical modeling

Slag splashing, Basic oxygen furnace, Physical Modeling.