발간논문

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Vol.34, No.12, 1628 ~ 1635, 1996
Title
Research Paper - Pyometallurgy - : Rate of the Removal of Non - metallic Inclusions from Aluminium Killed SUS430 Steel Melt
박정현Jung Hyun Park, 백영현Young Hyun Paik, 김동식Dong Sik Kim, 이용득Yong Deuk Lee
Abstract
The removal of non-metallic inclusions from the steel melt is very important in steel refining process. It is well known that the deoxidation rate is controlled by the rate of removal of the non-metallic inclusions from the melt. A kinetic model was proposed to describe the rate of removal of inclusions from the melt to the top slag. The model incorporates the adsorption rate of inclusions to the top slag and the dissolution rate of inclusions into the top slag. For quantitative evaluation of the rate equation, SUS430 melts were deoxidized by Al in a magnesia crucible at 1600℃ with synthetic CaO-SiO₂-Al₂O₃(CaF₂) slags. The total oxygen and soluble Al contents in the melt were determined as a function of refining time and the removal rate of inclusions were deduced therefrom, In addition, Ti-deoxidation data published previously were also examined. Analysis of the results indicates that the removal rate of inclusions is limited by both the adsorption. and the dissolution processes of inclusions and the dissolution rate is mostly affected by the basicity of top slag.
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