CONTINUOUS CASTING METHOD FOR MOLTEN STEEL WHICH IS NOT DEOXIDIZED

摘要

PURPOSE:To improve the quality of a product by providing a pouring part whose the top end in the inlet is constructed wider than the bottom end. CONSTITUTION:A pair of metallic belts 7 are provided and are driven by driving rolls 13. Metallic flasks 12 for cooling the belts having the curved surfaces which are wider in the upper pouring port and are narrower toward the lower part are disposed behind the belts 7. Cooling water is passed between the belts 7 and the flasks 12 and while the belts 7 are thereby cooled, a molten steel which is not deoxidized is poured from a tundish 1 into the pouring port. Since the pouring part is constructed to expand upward, the gaseous CO foam generated on the surface of a solidified shell 4 is easily floated without being captured by the shell 4. The bumping of the gaseous CO from the inside of an ingot and the leaving of pores in the inside are obviated and therefore the quality of the continuously cast ingot is improved.