Research on the Use of Synthetic Slags to Steel Elaborated in Duplex System EBT-LF

Abstract

Within the researches made, the establishment of the processing with synthetic slag decreasing possibilities, of the sulphur and oxygen contents, from the steel made in electric arc ovens, of 100 ton ladle capacity oven (LF) - (EBT) type, was taken into account. For the formation of the synthetic slag, reducing mixing made of lime, fluorine, bauxite and aluminum slag from the aluminum electrolysis were used. On average 1950 kg reducing mix/charge added on three stages were used. The processing period in LF was 40-60 min., and the pressure of Argon used at splashing was in the range of 3.5 - 5.5 at. Within the experiments, for the desulphurisation degree, respectively deoxidation, medium values of: ηSmed = 38,75 (35- 44), ηOmed = 54,821 (47 - 61) were obtained. On the Matlab program data processing, correlation equations between: ηO and ηS and the chemical composition of reducing slag and the parameters of splashing with Argon were obtained.