Abstract

A process for upgrading a precious metals-containing concentrate or residue results in near-quantitave removal of base metals and several impurity elements at elevated temperatures. The precious metals-containing concentrate or residue is exposed to oxygen or an oxygen-containing environment in an oxidative pre-treatment step followed by treatment with a hydrochlorinating agent in a hydrochlorination step to form an upgraded concentrate or residue.

IPC Classes  ?

• C22B 1/00 - Preliminary treatment of ores or scrap
• C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
• C22B 3/00 - Extraction of metal compounds from ores or concentrates by wet processes
• C22B 1/04 - Blast roasting
• C22B 1/08 - Chloridising roasting
• C22B 11/06 - Chloridising

Goods & Services

(1) Platinum.

Goods & Services

Precious metals and their alloys and goods in precious metals or coated therewith, not included in other classes; platinum; platinum group metals included in the class; jewellery, precious stones. Advertising, promotional and marketing services; market research, analyisis and forecasting services; business information services; the bringing together, for the benefit of others, of a variety of goods, enabling customers to conveniently view and purchase those goods; organisation of exhibitions. Mining extraction. Treatment of materials; precious metals refining; metal casting, tempering and treating.