Patent ID: 6372013
Filing Date: 2002-04-16
Classification: C21C

Abstract:
A particulate carrier material, for the introduction of magnesium metal combined with 0-10% lime into molten iron so as to desulfurize the iron, comprising calcium aluminate combined with lime and calcium fluoride to give a composition having, in percentages by weight:54-74% calcium oxide, 19-32% aluminum oxide, no more than 4% magnesium oxide, no more than 10% calcium fluoride, no more than 2.5% silicon dioxide, no more than 1.0% iron oxide, no more than 0.025% phosphorus pentoxide, no more than 0.025% titanium dioxide, no more than 0.5% manganese oxide, no more than 0.025% vanadium pentoxide, no more than 0.025% potassium oxide, no more than 0.05% sulfur and a combined loss on ignition and moisture content of no more than 1.5%, the particulate carrier material having a particle size of about 200 mesh.