| 摘要 |
<p>TITLE A METHOD AND APPARATUS FOR CONTINUOUSLY CASTING MOLTEN METAL INVENTOR ROBERT THOMSON A method of continuously casting molten metal in a reciprocable mould sealed to a vessel containing liquid metal by means of an extendible container, wherein a tube forming a passage from an orifice in the vessel to the mould is sealed at one end to the vessel, and at the other end dips into molten metal in an entry to the mould. A meniscus of molten metal around the tube and in the mould is stabilized by adjusting the pressure of inert gas fed into the extendible container so that the rate of flow of metal from the vessel to the mould is controlled directly by the rate of extraction of the solidifying casting from the mould. The problems related to controlling metal flow into the mould are substantially reduced. This is of particular significance in continuous casting steel, permitting the casting rate to be independent of the size of the orifice in the vessel, and of the ferrostatic head above it. Thus it is possible to use a larger orifice in the vessel, alleviating the problem of nozzle blockage, and to continuously cast aluminum killed steels where deoxidation by and alloying of aluminum is achieved in the vessel or during prior refining stages of preparation of the molten metal.</p> |
