Process for the recovery of metallic iron from slags and other residues
US5427607A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Nov 7, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S75/962
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for the recovery of at least a major proportion of the useful metallic iron values in small sized ferrous slags and drosses in which the slags and drosses are subjected to at least one grinding step in a wet grinding mill. Depending on the size of the slag and dross particles, either a peripheral end discharge rod mill or an axial discharge ball mill is used. In a preferred configuration, two wet grinding stages are used, comprising a peripheral end discharge rod mill followed by a ball mill. Products with different metallic iron contents are recovered by interposing screens with suitably sized openings between and after the grinding mills. This process makes it possible to recover at least about 80% of the metallic iron in the feed material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.