| 摘要 |
<p>A hydrometallurgical process for the recovery of zinc, copper, and cadmium from their ferrites by treating the ferrites under atmospheric conditions in a sulfuric acidbearing solution in the presence of potassium, sodium, or ammonium ions at 80-105.degree.C in order to precipitate, as jarosite, the iron present in the ferrites, separating a jarosite-bearing solid from the solution, feeding the solution to a neutral leach stage, to which acid and calcine are also fed and from which a solution containing zinc, copper, and cadmium is recovered and feeding the ferrite-bearing solid to the ferrite treatment stage, and recycling a portion of the jarosite-bearing solid obtained from the ferrite treatment stage to the process.</p> |
