2007•Canadian Metallurgical QuarterlyOpen access

Desulphurization Characteristics of Ladle Furnace Slags of a Low Sulphur Steel

Ender Keskinkilic, Ahmet Geveci, Yavuz Topkaya

Abstract

In steelmaking, one of the most important parameters for desulphurization is the oxygen potential of the system which can be expressed either by oxygen activity of the steel or by Fe t O activity of the slag. Removal of sulphur from the steel is enhanced when FetO activity of the slag and thus oxygen activity of the steel decreases. In this paper, ladle furnace slags of a low S steel quality currently produced in Eregli Iron and Steel Works Company (ERDEMIR), Turkey, were studied. Activity coefficients of Fe t O, γ Fe t O were calculated with the relation obtained from the literature. The relation between %Decrease α Fe t O and %DeS (measured) was studied. The percentage of sulphur removal was also investigated using the data of the oxygen activity of liquid steel.

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Key concepts: Steelmaking, Ladle, Basic oxygen steelmaking, Slag (welding), Metallurgy, Liquid steel, Sulfur, Oxygen