| 摘要 |
<p>A method for recovering gold from oxide ores containing 0.5 to 7.5 weight % of carbonaceous materials comprises leaching the concentrated ore with an alkaline thiosulfate (eg ammonium thiosulfate) solution to which an oxidizing agent and a stabiliser are added, gold being separated from the resulting saturated slurry by a zinc cementation precipitation method. The oxidizing agent may be H 2 O 2 , FeCl 3 or, preferably, cupric tetrammine ions. The stabiliser may be bisulfite or ammonia.</p> |
