Depressant for flotation separation of polymetallic sulphide ores
US5693692A · kind A · utility
13Cited by
23References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 9, 1994 |
| Grant date | Dec 2, 1997 |
| Priority date | — |
| Expiry date | May 9, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03D2203/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A new depressant for use in enhanced separation of polymetallic sulphides is described. The depressant agent is used in conjunction with conventional collector agents and frothing agents in the flotation separation of copper, nickel, lead, zinc sulphides by depressing iron sulphides such as pyrrhotite, pyrite and marcasite in the tailing. The depressant consists of a chemically-modified carbohydrate polymer, a polyacrylate and low foaming lignin sulphonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.