발간논문

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Vol.31, No.9, 1147 ~ 1156, 1993
Title
Equilibrium Study on the Nitrogen Reaction between Molten Steel and Slag
전찬욱Chan Wook Jeon, 조중욱Jung Wook Cho, 김선효Seon Hyo Kim
Abstract
The nitrogen reaction between steel and slag was studied by using CaO-Al₂O₃-TiO₂ slag system which has good ability for denitrogenization. The experimentally determined activity of Al₂O₃ increases with increasing TiO₂ content. The nitride capactiy, C_N to quantify the equilibrium nitrogen solubility in the slag increases with increasing TiO₂ content, but decreases with increasing slag basicity. The nitrogen reaction between CaO(BaO)-Al₂O₃-TiO₂ slag and steel may be interpreted by the Network model describing the behavior of oxygen and nitrogen ions in slag. The effect of the addition of BaO for replacing CaO on the nitride capacity was found to be very sensitive to the oxygen potentials. The nitrogen distribution ratio between CaO(BaO)-Al₂O,-TiO₂ slag and 304 stainless steel increased with decreasing Cr content and increasing temperature. Based on the results, the equilibrium nitrogen content in 304 stainless steel can be estimated when the denitrogenization is carried out using the slag investigated.
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