Process for refining solid precious metal containing concentrate

摘要

A method for refining a solid precious metal-containing concentrate comprising the following steps: 1. a high temperature treatment of the concentrate with hydrogen chloride gas to yield a first residue, 2. an optional treatment of the first residue with chlorine gas to yield a second residue, 3. a high temperature treatment of the first or second residue with oxygen to yield a third residue and, 4. a high temperature treatment of the third residue with hydrogen to yield a final residue.