METHOD AND DEVICE FOR REMOVING SLAG IN OXYGEN STEEL MAKING CONVERTER

摘要

PURPOSE:To improve the yield of iron, by flowing slag once into an auxiliary vessel to increase the layer thickness of the slag and to make the skimming easy and returning metal again to a converter, in the stage of skimming. CONSTITUTION:A vessel 2 which is opened at the top and has an axial center intersecting approximately orthogonally with the axial center of the furnace 1 is stuck in the port part of a converter 1 by bringing the opened surface at the top thereof into contact with the edge on the counter tapping side of the port 6 of the furnace 1. The furnace 1 is first tilted to admit the dephosphorized slag floating on the bath surface of the molten iron 3 in the furnace 1 into the auxiliary vessel 2. Since the depth of the slag 4 in the vessel 2 is large, the slag can be easily ladled away by a siphon type slag remover or the like. If the furnace 1 is returned perpendicularly thereafter the iron 3 flowed out into the vessel 2 is returned again into the furnace 1. The successing oxidation refining is thus started immediately, and the loss of the iron 3 in the stage of skimming of the converter 1 is reduced considerably.