| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently recover valuable metals, such as copper and noble metals, by using a cupola from copper and noble-metal scrap and sludge containing at least one or more valuable materials among copper and noble metals, such as gold, silver, platinum, palladium, rhodium and ruthenium. <P>SOLUTION: In the method for treating the scrap and/or sludge containing copper and noble metals, combustible copper and noble-metal scrap crushed to≤10 mm grain size is blown, together with powdery noncombustible copper and noble-metal scrap of≤3 mm grain size and a solvent, through a tuyere of the cupola. Noncombustible copper and noble-metal scrap, which is sized to 30 to 50 mm grain size, is charged, together with a solvent and coke, via a raw-material charging hole in the upper part of the cupola and separated, by means of a smelting reduction process in the cupola, into black copper composed mainly of copper, pig iron, slag and dust. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
