Title

EHT EQUIPMENT: REPLACING GAS CONSUMPTION FOR REFRACTORY CURING AT TUNDISH

EHT EQUIPMENT: REPLACING GAS CONSUMPTION FOR REFRACTORY CURING AT TUNDISH

Authorship

REIS, WALLACE FERNANDES DOS; SOUZA, GABRIEL RIOS DE; COSTA, MARCELO FIGUEIREDO; ALVES, MAXSUEL TIMOTEO; FILHO, DIMEREIS JOSÉ ROSA; BUR, PABLO GABRIEL; CASTRO, ABNER YAGO OLIVEIRA; BAITZ, ROMULO BATISTA; SILVA, JAVANCI MOREIRA

REIS, WALLACE FERNANDES DOS

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SOUZA, GABRIEL RIOS DE

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COSTA, MARCELO FIGUEIREDO

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ALVES, MAXSUEL TIMOTEO

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FILHO, DIMEREIS JOSÉ ROSA

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BUR, PABLO GABRIEL

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CASTRO, ABNER YAGO OLIVEIRA

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BAITZ, ROMULO BATISTA

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SILVA, JAVANCI MOREIRA

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DOI

10.5151/2594-5300-42967

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Abstract

Currently, industrial practices aim to evolve towards lower CO₂ emissions, in line with global trends for carbon footprint reduction and environmental care. In the field of refractory materials, new technologies have been developed with the objective of reducing water usage, which—among other advantages—allows for the reduction or even elimination of the drying step prior to use, thereby decreasing CO₂ emissions from gas combustion. However, some of these technologies still require intermediate thermal treatments (curing) to achieve satisfactory material properties, particularly mechanical strength. In the Tundish of Continuous Casting, certain dry-vibrated refractory technologies require such an intermediate thermal treatment (between 200 and 300 °C) before being put into operation to ensure adequate mechanical resistance. The conventional process for this thermal treatment involves gas combustion, which results in CO₂ emissions. Additionally, this conventional method offers less thermal precision, which can lead to premature degradation of the refractory material due to loss of mechanical strength. This work presents a new electric equipment, safer convective heating concept, integrated directly into the application form, offering improved temperature accuracy, cost reduction, and zero CO₂ emissions—thereby contributing to a lower environmental impact in steel production via Continuous Casting

CURRENTLY, INDUSTRIAL PRACTICES AIM TO EVOLVE TOWARDS LOWER CO₂ EMISSIONS, IN LINE WITH GLOBAL TRENDS FOR CARBON FOOTPRINT REDUCTION AND ENVIRONMENTAL CARE. IN THE FIELD OF REFRACTORY MATERIALS, NEW TECHNOLOGIES HAVE BEEN DEVELOPED WITH THE OBJECTIVE OF REDUCING WATER USAGE, WHICH—AMONG OTHER ADVANTAGES—ALLOWS FOR THE REDUCTION OR EVEN ELIMINATION OF THE DRYING STEP PRIOR TO USE, THEREBY DECREASING CO₂ EMISSIONS FROM GAS COMBUSTION. HOWEVER, SOME OF THESE TECHNOLOGIES STILL REQUIRE INTERMEDIATE THERMAL TREATMENTS (CURING) TO ACHIEVE SATISFACTORY MATERIAL PROPERTIES, PARTICULARLY MECHANICAL STRENGTH. IN THE TUNDISH OF CONTINUOUS CASTING, CERTAIN DRY-VIBRATED REFRACTORY TECHNOLOGIES REQUIRE SUCH AN INTERMEDIATE THERMAL TREATMENT (BETWEEN 200 AND 300 °C) BEFORE BEING PUT INTO OPERATION TO ENSURE ADEQUATE MECHANICAL RESISTANCE. THE CONVENTIONAL PROCESS FOR THIS THERMAL TREATMENT INVOLVES GAS COMBUSTION, WHICH RESULTS IN CO₂ EMISSIONS. ADDITIONALLY, THIS CONVENTIONAL METHOD OFFERS LESS THERMAL PRECISION, WHICH CAN LEAD TO PREMATURE DEGRADATION OF THE REFRACTORY MATERIAL DUE TO LOSS OF MECHANICAL STRENGTH. THIS WORK PRESENTS A NEW ELECTRIC EQUIPMENT, SAFER CONVECTIVE HEATING CONCEPT, INTEGRATED DIRECTLY INTO THE APPLICATION FORM, OFFERING IMPROVED TEMPERATURE ACCURACY, COST REDUCTION, AND ZERO CO₂ EMISSIONS—THEREBY CONTRIBUTING TO A LOWER ENVIRONMENTAL IMPACT IN STEEL PRODUCTION VIA CONTINUOUS CASTING

Keywords

Working linning: Heating equipment, Tundish refractory.

Working linning, Heating equipment, Tundish refractory