Hydrometallurgical treatment of metallurgical dust
US4332777A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1980 |
| Grant date | Jun 1, 1982 |
| Priority date | — |
| Expiry date | Jun 6, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process and apparatus for hydrometallurgical treatment of metallurgical dust by acid leaching followed by a solid-liquid separation. The invention is characterized in that the leaching phase is effected by moderate acid attack (pH at the end of the reaction about 4 or 5) and in which a supplementary solid-solid separation stage is provided, before the solid-liquid separation or after. The invention is applicable to all dusts resulting from treatment of metals, notably ironworking dusts, and particularly those formed in blast furnaces so as to permit the separation and recovery of useful elements contained therein, such as iron, zinc and lead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.