Title

METHODOLOGY FOR DEVELOPING EXOTHERMIC STARTING POWDER AT APERAM, A LABORATORY AND INDUSTRIAL APPROACH

METHODOLOGY FOR DEVELOPING EXOTHERMIC STARTING POWDER AT APERAM, A LABORATORY AND INDUSTRIAL APPROACH

Authorship

QUINELATO, FERNANDO PAULUCIO; BOTELHO, THALES; ALVES, JOÃO GERALDO; BARROS, THALES HARVEY CRISOSTOMO; DIEGO, ALEXANDRA DE ALMEIDA; RIBEIRO, DAVI FARIAS; PEREIRA, MÁRCIA MARIA DA SILVA MONTEIRO; SILVA, JOILSON MOREIRA FERREIRA DA; PESSOA, RAYLANDER

QUINELATO, FERNANDO PAULUCIO

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BOTELHO, THALES

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ALVES, JOÃO GERALDO

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BARROS, THALES HARVEY CRISOSTOMO

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DIEGO, ALEXANDRA DE ALMEIDA

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RIBEIRO, DAVI FARIAS

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PEREIRA, MÁRCIA MARIA DA SILVA MONTEIRO

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SILVA, JOILSON MOREIRA FERREIRA DA

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PESSOA, RAYLANDER

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DOI

10.5151/2594-5300-41152

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Abstract

CASTING QUALITY AND OPERATIONAL STABILITY ARE ESSENTIAL IN THE STEELMAKING PROCESS WHEN PRODUCING SPECIALTY GRADES. IN THIS CONTEXT, EXOTHERMIC STARTING POWDERS ARE VERY IMPORTANT TO ENHANCE THE QUALITY AND STABILITY AT THE BEGINNING OF CONTINUOUS CASTING PROCESS. IN THIS PAPER A METHODOLOGY TO VALIDATE A STARTER POWDER BY PERFORMING LABORATORY AND INDUSTRIAL TESTS, THEN COMPARING THE SOLUTION PROPOSED WITH THE CURRENT ONE WILL BE DISCUSSED. BY USING THERMOGRAVIMETRIC ANALYSIS (TGA) AND DIFFERENTIAL SCANNING CALORIMETRY (DSC), IT WAS POSSIBLE TO QUANTIFY THE EXOTHERMIC ENERGY GENERATED DURING THE REACTIONS AND PROVE THE EQUIVALENCE BETWEEN THE POWDERS. COMPLEMENTING THE LABORATORY APPROACH, A FURNACE TEST WAS PROPOSED TO INVESTIGATE AND COMPARE THE REACTION BEHAVIOR. AT THE CONTINUOUS CASTING FLOOR PROPOSED PARAMETERS WERE USED TO MEASURE THE BEHAVIOR IN THE MOLD, WHICH SHOWED SIMILAR RESULTS BETWEEN THE POWDERS. HOWEVER, THE DIFFERENCES IN REACTIONS IN THE MOLD WERE IDENTIFIED FOR DIFFERENT STEEL GRADES. FINALIZING THE INDUSTRIAL METHODOLOGY, THE SLAB QUALITY WAS EVALUATED, THUS ENSURING THE SUCCESS OF THE DEVELOPMENT AND EFFICIENCY OF THE METHODOLOGY PROPOSED.

CASTING QUALITY AND OPERATIONAL STABILITY ARE ESSENTIAL IN THE STEELMAKING PROCESS WHEN PRODUCING SPECIALTY GRADES. IN THIS CONTEXT, EXOTHERMIC STARTING POWDERS ARE VERY IMPORTANT TO ENHANCE THE QUALITY AND STABILITY AT THE BEGINNING OF CONTINUOUS CASTING PROCESS. IN THIS PAPER A METHODOLOGY TO VALIDATE A STARTER POWDER BY PERFORMING LABORATORY AND INDUSTRIAL TESTS, THEN COMPARING THE SOLUTION PROPOSED WITH THE CURRENT ONE WILL BE DISCUSSED. BY USING THERMOGRAVIMETRIC ANALYSIS (TGA) AND DIFFERENTIAL SCANNING CALORIMETRY (DSC), IT WAS POSSIBLE TO QUANTIFY THE EXOTHERMIC ENERGY GENERATED DURING THE REACTIONS AND PROVE THE EQUIVALENCE BETWEEN THE POWDERS. COMPLEMENTING THE LABORATORY APPROACH, A FURNACE TEST WAS PROPOSED TO INVESTIGATE AND COMPARE THE REACTION BEHAVIOR. AT THE CONTINUOUS CASTING FLOOR PROPOSED PARAMETERS WERE USED TO MEASURE THE BEHAVIOR IN THE MOLD, WHICH SHOWED SIMILAR RESULTS BETWEEN THE POWDERS. HOWEVER, THE DIFFERENCES IN REACTIONS IN THE MOLD WERE IDENTIFIED FOR DIFFERENT STEEL GRADES. FINALIZING THE INDUSTRIAL METHODOLOGY, THE SLAB QUALITY WAS EVALUATED, THUS ENSURING THE SUCCESS OF THE DEVELOPMENT AND EFFICIENCY OF THE METHODOLOGY PROPOSED.

Keywords

Exothermic Starting Powders; Continuous Casting Starter, Differential Scanning Calorimetry.

Exothermic Starting Powders; Continuous Casting Starter, Differential Scanning Calorimetry.