HYDROMETALLURGICAL TREATMENT PROCESS FOR EXTRACTION OF PLATINUM GROUP METALS OBVIATING THE MATTE SMELTING PROCESS

摘要

A hydrometallurgical treatment process for extracting platinum group metalsfrom a flotation concentrate in which the inventionrevolves around obviating the matte smelting and granulating process. Insteadthe concentrate is submitted to pressure leaching, oxidativeor reductive roasting and final recovery by means of ion exchange adsorption.Roasting is applied in order to convert the platinum groupmetals to a form that dissolves in chlorine/HCL and a chlorine/HCL leach thatrenders the platinum group metals in solution.