| 摘要 |
TREATMENT PROCESS FOR EXTRACTION OF METALS FROM ORES This invention relates to a hydrometallurgical process for extracting one or more saleable elements, in particular platinum group metals (PGMs), gold, silver and base metals from a sulphur-depleted or otherwise poorly-flotable ore (10). The process comprises either a hot sulphuric acid leaching step (12) to selectively separate base metals (16) into sulphate medium (14), from a solid residue containing the PGMs, gold and silver or a chloride leaching step (20) for recovery of PGMs, gold and silver (24) into chloride leaching medium (22), or both steps to recover the saleable elements. The process may further include a thermal treatment step (18) to condition the PGMs, gold and silver in the solid residue to be soluble in chloride medium. Denotes sulphate media .. so.utn . f. s Atmospheric or Pressure H Solui flows Sulphuric Acid Leach H S 14 Base metal recovery -Solid liquid separation g 16 *Co, REE,~ Y Thermal Treatment 18 U Th 2nuMnuCdiMoAciorLNacC Chion.atio ~ HCI and/or NaCI 22 Precious metal recovery Solid -liquid separation PGM, A...,..i.usT..n |
