REFRACTORIES FOR CONNECTION OF HORIZONTAL CONTINUOUS CASTING DEVICE

摘要

PURPOSE:To provide hollow refractories for connection to be interposed between a tundish and a casting mold which withstand a long-time continuous operation and to suppress intrusion of impurity inclusions into a molten metal by using a refractory blank material contg. a specific amt. of carbon and a consisting of the balance oxide to form the specific part of said refractories. CONSTITUTION:An intermediate ring (cylindrical member 4b) formed of a refractory blank material contg. 5-40wt% carbon and consisting of the balance substantially oxide is disposed at the feed nozzle side in the part nearer than the break ring (cylindrical member 4C) adjacent to a casting mold 1 where a solidified shell having a relatively thin wall can be formed. The costly ceramic break ring is thus made shorter than in the prior art and the cost is reduced. The damage of the refractories adjacent to the break ring by the solidified shell is suppressed.