Briquette for producing a foamed slag effect in eaf technology in stainless steel production

摘要

It is known that a foamed slag can be produced on stainless steel melts in an electric arc furnace by introducing a mixture of metal oxides limestone carbon and a binder in the form of briquettes into the furnace so that the briquettes become arranged there in such a way that the metal oxides are reduced by the carbon and the limestone is thermally dissociated at the metal slag interface beneath the slag and the resulting gases bring about foaming of the slag by bubble formation. This foaming on steels having a high chromium content due to the significant uptake of chromium oxide by the slag leads to problems which result from the physicochemical properties of slags having a high chromium oxide content. To provide according to the invention briquettes suitable for producing foamed slag having a high chromium oxide content which is carried out in particular by the process of WO 2010/003401 A1 all briquette properties to be taken into account and all materials suitable for briquette production are tabulated in the form of a matrix.