2004•Gangtie yanjiu xuebaoRequires access

Determination of Sulfide Capacity, Sulfur Distribution Ratio and Desulfurization Percentage in Ladle Furnace Refining Process

Che Yinchang

Abstract

In order to determine desulfurising ability of the top-slag in LF refining process, the variation of sulfide capacity with composition in the slag system CaO-SiO_2-Al_2O_3-MgO (5%) at 1 627 ℃ was illustrated by means of calculating the optical basicity. From the sulfide capacity and oxygen activity which is in equilibrium with aluminium dissolved in steel, the sulfur distribution ratio could be calculated. The relations between percentage of sulfur removal and amount of slag for various sulfur distribution ratio were also illustrated. One of the most convenient method for obtaining a maximal percentage of sulfur removal in LF refining process might be offered, if the composition and amount of slag as well as the oxygen activity and sulfur content in steel were known.

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Key concepts: Refining (metallurgy), Sulfur, Flue-gas desulfurization, Slag (welding), Sulfide, Ladle, Chemistry, Metallurgy