| 摘要 |
PURPOSE:To produce a steel ingot having a large thickness without having surface flaws and without inducing troubles such as leakage of a molten metal in the stage of casting continuously the molten metal with a twin-roll type continuous casting device, etc. by providing heat resistant rolls above twin rolls in tight contact therewith and forming a pouring basin for the molten metal by two sets of said rolls. CONSTITUTION:The heat resistant rolls 6, 6 are rotatably disposed above the cooling rolls 1, 1 of the twin-roll type continuous casting device. The molten metal 3 supplied from a tundish 2 enters the pouring basin constituted of both roll sets 1, 1 and 6, 6 and therefore the distance (l) at which the molten metal 3 contacts with the surfaces of the rolls 1, 1 increases. The production of the steel ingot 4 having the large thickness is thus made possible by an increase in the (l) to control the thickness of the ingot 4. The rolls 6, 6 above the rolls 1, 1 rotate in tight contact with the rolls 1, 1 and therefore there is no leakage of the molten metal. The formation of flaws on the surfaces of the rolls 1 as a result of friction with a gate frame 5 and the consequent deterioration of the quality of the ingot 4 surface as in the case of providing the frame 5 are obviated. |
