On Several Slag-Metal Reactions and Refining Abilities of the Ladle Furnace

Abstract

Several Slag-metal reactions and refining abilities of the ladle furnace (LF PROCESS) have beenstudied.
The results obtained from these studies are as follows:
(1) Desulfurization is dependent of slag basicity, reducing degree of slag and agitation of melt. (2) The numerical value of sulfur distribution coefficient is above a hundred. (3) Deoxidation is dependent on aluminium content of metal, slag basicity, agitation of melt and lining refractory. (4) Total oxygen content after treatment is below 20ppm in the case of Al-Si killed steel, below 35ppm in the case of Si-Mn killed steel. (5) Hydrogen absorption is caused by flux, so hydrogen content is dependent on drying degree of flux. (6) Nitrogen content is controlable in the required range from 20ppm to 80ppm by the way of alloy addition at tapping from BOF.