METHOD FOR PREVENTING OVER-COOLING OF MOLTEN STEEL IN TUNDISH FOR CONTINUOUS CASTING AND STRUCTURE OF TUNDISH

摘要

PURPOSE:To suitably prevent over-cooling of molten steel in the initial stage of casting by dividing inner in a tundish into a heating chamber and casting chambers with weirs having a partition plate, melting the partition plate with molten steel heat in the heating chamber and flowing the molten steel into the casting chambers. CONSTITUTION:In the tundish A body, the heating chamber 1 and the casting chambers 2a, 2b are formed by arranging one pair of weirs 4a, 4b and the heater 7 for cylindrical induction heating is connected with one side part of the heating chamber 1 and the nozzles 8 are arranged in the casting chambers 2a, 2b. The pouring chamber 3 is formed at the other side part of the heating chamber 1 through the weir 6 and in a window hole 41 of the weirs 4a, 4b, the partition plate 5 having m.p. lower than the molten steel and thickness to be melted after lapsing for the prescribed time by contacting with the molten steel is arranged. By this constitution, the molten steel is held in the heating chamber 1, and heated with the heater 7 at the initial stage of casting, and the partition plate 5 is melted after the prescribed time, and the molten steel is flowed into the casting chamber 2a, 2b to start the casting. By this method, the over-cooling of the molten steel in the tundish A is prevented at the initial stage of the casting.