| 摘要 |
The invention relates to a method for leaching a material containing a va luable metal and precipitating the valuable metal as a fine-grained powder b y changing the electrochemical potential of an intermediary metal in the sol ution. In the leaching stage the intermediary metal or substance of the elec trolyte solution is at a high degree of oxidation and in the precipitation s tage another electrolyte solution is routed into the solution, in which the intermediary metal or substance is at a low degree of oxidation. After the p recipitation stage the solution containing the intermediary is routed to ele ctrolytic regeneration, in which part of the intermediary is oxidised in the anode space back to a high potential value and part is reduced in the catho de space to its low value. |
