| 摘要 |
<p>Small pieces of metallic copper waste are leached in 10 % sulphuric acid while simultaneously hydrogen peroxide is added as a catalyst. Leaching is performed until the pH of the solution is constant (5.0 - 5.5). The lixivium is settled, filtered through a mud-press, concentrated by heating, evaporating and occasional pumping of the new solution until a required concentration of copper of 150g/l is reached. The input solution is transferred to the dusting assembly which sprays the solution at high revolution through jets onto the walls of drying chamber. The generated product is hammered by hammers from the walls and sucked with a blower through a cyclone into a reservoir. The input temperature of the drying chamber is maintained at 230 °C and output temperature at 110 °C.</p> |
