Multiple-stage grinding circuit
US11420211B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 2017 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Jul 4, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03B7/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method includes separating, in a first stage of separating, crushed ore material by size into a first fines stream and a first coarse stream; grinding the first coarse stream in a second stage of grinding; feeding the product of the second stage of grinding back to the step of separating; feeding the first fines stream from the step of separating to a recovery circuit; producing a rejected stream from the recovery circuit of crushed ore material that does not meet the target mineral size; separating, in a second stage of separating, the rejected stream from the recovery circuit into a second fines stream and a second coarse stream; grinding the second coarse stream in a third stage of grinding; and feeding the product of the third stage of grinding back to the recovery circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.