METHOD FOR REMOVING INCLUSION IN TUNDISH FOR CONTINUOUS CASTING, AND TUNDISH FOR CONTINUOUS CASTING

摘要

PROBLEM TO BE SOLVED: To provide a method for removing inclusions in a tundish for the continuous casting of steel, which method can effectively remove the inclusions, and can prevent the generation of the inclusions due to the contamination by flux and the oxidation by air.;SOLUTION: A bubble tower is arranged on the downstream side of a partition wall, which separates the position for pouring molten steel from a ladle and the position for discharging the molten steel to a casting mold, such that the side surfaces of the bubble tower are surrounded with refractory walls and the bubble tower stands almost uprightly. The molten steel existing on the upstream side is introduced from a connecting passage provided at the lower portion of the partition wall into the inside of the bubble tower, and in addition, an upflow of the molten steel is formed in the bubble tower by blowing an inert gas from the bottom of the bubble tower. Further, a bubble floating region is partitioned with an upper weir immersed in the molten steel, and is covered with an upper lid to prevent the intrusion of tundish slag into the bubble floating region. As a result, the upper space is substantially in the atmosphere of the inert gas.;COPYRIGHT: (C)2006,JPO&NCIPI