발간논문

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Vol.33, No.11, 1514 ~ 1521, 1995
Title
Effects of Slag Composition on the Solubility of Nitrogen in Steelmaking Slag
이효석H . S . Song, 이창희C . H . Rhee, 민동준D . J . Min, 유병돈B . D . You
Abstract
Equilibrium experiments between gas and slag were carried out to understand the thermodynamic behavior of nitrogen in CaO-SiO₂-CaF₂ slag system at 1600℃. The solubility of nitrogen in this slag system increased as the oxygen potential decreased and as the reaction temperature increased. The values of the nitride capacity has a minium at bout 2.0 slag basicity having higher values in both more acidic and basic region. This may be explained by two mechanisms for nitrogen dissolution ; incorporated nitride ion and free nitride ion state. In slag with 2.0 basicity or less, MgO content increased the nitride capacity slightly at higher slag basicity, however, nitride capacity decreased with MgO content. The effects of BaO to substitute CaO on nitride capacity showed similar behaviors as MgO. These complex relationship between basicity of slag and nitride capacity is explained by using optical basicity. It was found that nitride capacity and optical basicity had a clear relationship even in the different basic oxide systems.
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