Patent · US Active

Process and plant for treating ore concentrate particles containing valuable metal

US9200345B2 · kind B2 · utility

0Cited by

4References

27Claims

0Family size

Assignee

Outotec Oyj · FI

Inventors

Ake Holmström · Katthammarsvik, SE
Karin Lundholm · Skellefteå, SE
Gunnar Berg · Kristiansand, NO
Jochen Güntner · Alzenau, DE

Key dates

Filing date	Dec 14, 2010
Grant date	Dec 1, 2015
Priority date	—
Expiry date	Jun 29, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/20
WIPO fieldChemical engineering
WIPO sectorChemistry

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 SO3 in the gas mixture. The exit gas is exposed to subsequent gas cooling and dust removal steps.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.