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http://dx.doi.org/10.7844/kirr.2019.28.2.40

Effect of Carbon Materials on the Slag Foaming in EAF Process  

Kim, Young-Hwan (Steelmaking Research Team in R&D Center of Dongkuk Steel Mill Co.)
Yoo, Jung-Min (Steelmaking Research Team in R&D Center of Dongkuk Steel Mill Co.)
Um, Hyung-Sic (Steelmaking Research Team in R&D Center of Dongkuk Steel Mill Co.)
Publication Information
Resources Recycling / v.28, no.2, 2019 , pp. 40-45 More about this Journal
Abstract
During steelmaking in EAF, recycled scraps is used as a main material, melted by arc, and electricity use as a main energy. Slag foaming is an important technology for reducing electrical energy. CO gas generated by the reaction between injection carbon and (FeO), [C] and injection {$O_2$}. CO gas generated by this reaction is collected in slag, resulted in slag foaming. In general, the carbon materials used in the EAF process is anthracite and coke. This study investigated the effects of the carbon materials used on slag foaming in the steelmaking process. As a result of this study, the slag foaming height is increased by cokes rather than anthracite, and with an increase in the amount of particles samller than $500{\mu}m$. Based on these results, the application to the operation resulted in increase of slag forming height, reduction of injection carbon, and reduction of electrical energy.
Keywords
EAF; Injection carbon; Slag foaming; Particle Size;
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