| 摘要 |
<p>PCT No. PCT/SE92/00434 Sec. 371 Date Oct. 21, 1993 Sec. 102(e) Date Oct. 21, 1993 PCT Filed Jun. 17, 1992 PCT Pub. No. WO92/22673 PCT Pub. Date Dec. 23, 1992.A process for the treatment of complex metal sulphide materials and for the recovery of metal values from such materials. The process involves first subjecting the material to a leaching process under conditions such that sulphide-sulphur is oxidized to sulphate and such that oxidized iron and impurities such as As will pass into solution, whereafter the leaching residue is melted for conventional pyrometallurgical recovery of the metal values. Different embodiments of the process provide for the recovery of precious metal values from refractory materials containing such values and for the recovery of metal from complex copper concentrate and complex nickel concentrate.</p> |
