METHOD AND APPARATUS FOR POURING MOLTEN METAL IN CONTINUOUS CASTING FOR METAL STRIP

摘要

PURPOSE:To stabilize formation and development of solidified shell by adjusting gas pressure of pressurized gas filled up in a vessel storing molten metal and controlling variation of flow rate of the molten metal supplied on surface of cooling drums from the vessel. CONSTITUTION:The molten metal D supplied from a ladle A is stored in a tundish B composing of an inner vessel 1 and an outer shell 2. The molten metal D is poured into a pouring basin part 13 on one pair of the cooling drums C through a tapping hole 9 providing a stopper 10. The solidified shell D1 formed on the cooling drums C is integrated by rotation of the cooling drums C, to continuously cast the metal strip D2. In the above casting method, head of the molten metal D in the inner vessel 1 is detected by a level guage 11. A flow rate adjusting valve 8 from the pressurized gas supplying source 6 is controlled through controlling system 7 in accordance with the head detected value, to adjust the gas pressure P of the pressurized gas in the tundish B. By this method, the head pressure of the molten metal D at the tapping hole 9 is held to the prescribed value and the variation of flow rate into the pouring basin part 13 of the molten metal D is prevented.