Título

FLUIDIC COJET®: IMPLEMENTATION, OPERATIONAL RESULTS AND CONSIDERATIONS ABOUT SIDE-WALL BURNERS WITH DIRECTIONAL FLAME

FLUIDIC COJET®: IMPLEMENTATION, OPERATIONAL RESULTS AND CONSIDERATIONS ABOUT SIDE-WALL BURNERS WITH DIRECTIONAL FLAME

Autoria

Dalsenter, Rafaela Bianca Prade; Pelisser, Gustavo Frassini; Pimentel, Guilherme Silva; Fallavena, Eduardo Prestes; Marques, Izaias Lucas; Zagury, Pedro Athias; Costa, Tiago Ribeiro; Ayaskanta, Arya; Warty, Sumant; Groetz, Rita Marie

DOI

10.5151/2594-5300-39908

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Resumo

This work aims to present a new methodology for injecting oxygen in electric arc furnaces using burners with directional flame to increase energy efficiency, reduce power on and improve operational stability. For this, a comparative study was carried out between the traditional CoJet® method and the new Fluidic CoJet®, on an industrial scale, replacing 20% of original equipment and thus, 20% of the chemical energy package. The method of oxygen injection through multidirectional burners was designed and built based on computer simulations and fluid dynamics studies, considering aspects of geometry, size, and materials. Experimental tests were conducted in 1386 heats, varying the direction of the burner’s flame at different times in the melting stage. The Fluidic Cojet® was able to keep its operability both as in the injector and burner functions, but further tests are needed to validate the impact on process performance when comparing it with the original configuration. When comparing only the Fluidic Cojet® with and without flame deflection use, a slight decrease in melting step time and carbon consumption was evidenced. A reduction in skull formation and improvement in scrap fallings during melting was evidenced. Other process considerations include current stability, electrode breakages, and combustion chamber saturation

 

This work aims to present a new methodology for injecting oxygen in electric arc furnaces using burners with directional flame to increase energy efficiency, reduce power on and improve operational stability. For this, a comparative study was carried out between the traditional CoJet® method and the new Fluidic CoJet®, on an industrial scale, replacing 20% of original equipment and thus, 20% of the chemical energy package. The method of oxygen injection through multidirectional burners was designed and built based on computer simulations and fluid dynamics studies, considering aspects of geometry, size, and materials. Experimental tests were conducted in 1386 heats, varying the direction of the burner’s flame at different times in the melting stage. The Fluidic Cojet® was able to keep its operability both as in the injector and burner functions, but further tests are needed to validate the impact on process performance when comparing it with the original configuration. When comparing only the Fluidic Cojet® with and without flame deflection use, a slight decrease in melting step time and carbon consumption was evidenced. A reduction in skull formation and improvement in scrap fallings during melting was evidenced. Other process considerations include current stability, electrode breakages, and combustion chamber saturation

Palavras-chave

Electric Arc Furnace; Oxy-fuel Burners; Flame Deflection

Electric Arc Furnace; Oxy-fuel Burners; Flame Deflection