TWO-DIVIDED TUNDISH IN DIFFERENT KINDS OF MATERIALS BY CONTINUOUS CASTING METHOD

摘要

PURPOSE:To enable continuous casting of different kinds of materials and to improve the yield by arranging a weir driving a tundish into two between the pouring hole part and the level difference and arranging opening part opening to the height lower than the level difference at the lower bottom surface in this weir and a gate for partioning these two parts as openable/shuttable. CONSTITUTION:The molten steel A is poured into a section II in the tundish 1 from the pouring hole 6 of a ladle 5 under opening the gate 7 and cast into a mold M through a pouring hole 3. When the surface of the molten steel A comes to almost the same height h1 as the level difference, by descending a draw-up member 8, the gate 7 is descended, to shut the opening part 4a. By this method, a large part of the remained molten steel A flows into the mold from the pouring hole 3 and on the other hand, in the section II, the different kind of the molten steel B from the ladle 5 is poured on the molten steel A remaining a part thereof and filled up. Successively, at the time of fully opening the opening part 4a by pulling up the gate 7, the different kind of the molten steel B flows into a section I. As slag 9 is low sp. gr., the slag is floated up in accordance with pouring the different kind of the molten steel B and is not mixed into the mold. By this method, the continuous casting of the different kinds of molten materials can be executed without stopping the casting line.