Rate of Desulphurization of Molten Iron by Slag under Reducing Condition (II). Influence of Silicon and Manganese

Abstract

The influence of silicon and manganese on the rate of sulphur transfer across a slag-metal interface has been studied at a temperature range from 1490 to 1560° in graphite crucibles. The experimental method was the same as in the previous report. The rate of sulphur-transfer from metal to slag increases with increasing silicon and manganese in metal, while that from slag to metal does not change appreciably. Therefore, the rate of desulphurization of molten iron by slag increases with increasing silicon and manganese. The consideration of sulphur activity does not account for the increase of the rate of desulphurization. The mechanism of sulphur transfer and the influence of silicon and manganese are discussed.