The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2015
Filed:
Dec. 14, 2010
Åke Holmström, Katthammarsvik, SE;
Karin Lundholm, Skellefteå, SE;
Gunnar Berg, Skellefteå, SE;
Jochen Güntner, Kahl, DE;
Åke Holmström, Katthammarsvik, SE;
Karin Lundholm, Skellefteå, SE;
Gunnar Berg, Skellefteå, SE;
Jochen Güntner, Kahl, DE;
Outotec Oyj, Espoo, FI;
Abstract
A process and a plant for treating ore concentrate particles containing valuable metal and having at least arsenic and sulfur containing components. The process comprises a two-stage roasting process comprising a first roasting step and a second roasting step. A gas mixture is formed from the first process gas component obtained from the first roasting step and from the second process gas component obtained from the second roasting step. Post combustion of the gas mixture is made in a post combustion chamber that uses the sulphide rich first process gas component and the second process gas component as oxidizer gas in order to decompose SOin the gas mixture. The exit gas is exposed to subsequent gas cooling and dust removal steps.