process and plant for the treatment of kupferstrangguss

摘要

1435789 Continuously casting; treating copper rod SOUTHWIRE CO 30 Oct 1973 [30 Oct 1972 26 Feb 1973] 50374/73 Headings B3A and B3F [Also in Division C7] Continuously cast and rolled Cu rod having an oxidized surface layer, as it emerges from the rolling mill, is passed at elevated temperature through a treating zone comprising an openended conduit through which there is passed to contact and thermally shock, and thus to cool and clean said rod, a colder liquid treating composition, containing in aqueous solution an aliphatic monohydroxy alcohol, polyhydroxy alcohol, or ketone, an alkyl- or alkanol-primary-, secondary- or tertiary-amine or a mixture thereof, and having pH7. The pH may be adjusted with alkali metal hydroxide or Na 2 CO 3 , and the composition may contain a surfactant, chelating agent or an antifoam, e.g. Ca acetate, and may contain wax, through the rod may be be waxed later, just before coiling. As shown, cast bar 12 energes from continuous casting machine 11, is rolled in mill 13, and rolled rod 14 passes through treating zones 15, 17, 19, 21 and pinch rolls 22 to coiler 24. Liquid composition from 30 is pumped to heat exchanger 33 and is fed via 36, 37, 38, 39, to the treating zones and recycled as shown. Figs. 2 to 4 (not shown) illustrate in detail means whereby the rod is treated with the composition concurrently or countercurrently in the various zones.