Abrégé

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.

Classes IPC  ?

• C22B 1/00 - Traitement préliminaire de minerais ou de débris ou déchets métalliques
• C22B 7/00 - Mise en œuvre de matériaux autres que des minerais, p. ex. des rognures, pour produire des métaux non ferreux ou leurs composés
• C22B 3/00 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés
• C22B 1/04 - Grillage à l'air
• C22B 1/08 - Grillage chlorurant
• C22B 11/06 - Obtention des métaux nobles chloruration

Produits et services

(1) Platinum.

Produits et 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.