| 摘要 |
<p>PURPOSE:To recover valuable metals contained in manganese nodules at a high rate of extraction by subjecting the nodules to acid leaching in the presence of a carbonaceous substance. CONSTITUTION:A powdery carbonaceous substance such as acetylene black is added to ground manganese nodules, and an acid such as dil. sulfuric acid is further added and reacted with the nodules. By this method, even when the manganese nodules are subjected to acid leaching under relatively mild conditions, the Mn-Fe matrix can be easily destroyed, and valuable metals such as Ni, Co and Cu are made soluble. The carbonaceous substance produces a satisfactory effect even when the amount is <=0.5g per 1g manganese nodules.</p> |
