METHOD AND APPARATUS FOR CONTINUOUSLY CASTING AL-LI SERIES ALLOY

摘要

PURPOSE:To prevent explosion of molten metal in spite of using water by executing cooling through wall face of a casting hole contacting with molten metal, spraying warm water to outer circumferential surface of a cast billet to execute cooling and forcedly vaporizing material, which is not yet vaporized, the heating. CONSTITUTION:The molten Al-Li series alloy 18 is supplied from a nozzle 16 under condition of closing opening part at lower side of a mold 10 with a bottom base 14. The water is allowed to flow in a flowing passage 22 and execute cooling. The bottom base 14 is descended to draw down solidified cast billet 20. The warm water or hot water is sprayed around the cast billet 20 from a spraying tube 28 at lower position than outlet end of the casting hole 12 to execute secondary cooling. The secondary cooling water, which is not vaporized and dropped as liquid-state, is separated from the surface of the cast billet 20 with an elastic seal 30 and introduced onto a hot plate 32 for vaporizing and vaporized forcedly with the electric heater 34. In the primary cooling, the molten metal does not contact with the water and in the secondary cooling, the water is easily vaporized because of the warm water or hot water and further, as the water is forcedly vaporized, the explosion of the molten metal can be prevented.