Additive for promoting slag formation in steel refining ladle

Abstract From the Canadian patent

In ladle refining of steel a molten protective slag covering is used consisting of iron blast furnace slag or, of a mixture of solid burnt lime and/or burnt dolomitic lime together with iron blast furnace slag in an amount effective to serve as a flux promoting the melting of the lime and dolomitic lime. The iron blast furnace slag avoids the environmentally harmful emissions caused by use of fluorspar as a flux. It forms a quicker melting slag resulting in, lower power usage and shorter refining times. It forms a final slag with good physical properties. There is considerable reduction of wear of the ladle and roof refractories and carbon pick up from the ladle refining electrodes is …