| 摘要 |
<p>An apparatus (22) is disclosed for removing superheat from liquid metal (18) as it passes from a holding vessel (10) to a casting mould (20), the apparatus comprising a distributor section (28) which extends into the upstream end of a cooling section of the apparatus and is adapted to direct liquid metal onto a surface of the cooling section (34). By distributing the metal stream (26) directly onto the surface of the cooling section, the tendency of a thick and substantial skull to form within the flow is substantially reduced. It is preferred if a cooling section is substantially cylindrical, in which case it is also preferred if the distributor directs metal onto an inner surface of the cylinder with some radial component of velocity. Thus, liquid metal can impinge transversely on a cooling section surface. The cooling section is suitably water cooled. In this case, it is preferred if the water flow passages (36) are linked to a source of compressed air. In emergency, the water flow can be shut off and the compressed air released into the cooling system thereby purging it of water. It has been found that this arrangement of the casting apparatus is highly effective in providing a reproducible superheat removal.</p> |
