| 摘要 |
<p>The ingot mould of the invention includes a cooled copper body (4) on top of which is mounted a refractory feeder bush (9) consisting of two components: a heat insulating upper sleeve (16) and a compact refractory lower ring (17) of high mechanical strength enclosed by a crimping bush (18) which is narrower than ring (17) so that the latter projects on either side of the crimping bush. By subjecting the inner surface of the crimping bush to successive surfacing treatments which are repeated after the two surfaces have been reversed, it is possible to extend substantially the useful life of said crimping bush before replacing it.</p> |
