Method and system for maintaining optimum throughput in a grinding circuit
US4026479A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1976 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Mar 18, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C25/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and a system are disclosed for maintaining optimum throughput in a grinding circuit of the type in which fresh ore is fed to a rod mill and the ground ore from the rod mill, together with the ground ore from a ball mill operated in a reversed circuit, are combined in a pump box and pumped to a cluster of hydrocyclone classifiers. The rod mill is operated in open circuit but the ball mill is operated in closed circuit with the cyclone classifiers which serve to classify the mill discharge material, returning the oversize to the ball mill. The system comprises monitoring devices for sensing the cyclone classifier feed density and any one or combinations of the following conditions of the grinding circuit: (1) rod mill sound, (2) ball mill sound, (3) pump box level, and (4) cyclone overflow particle size and density. A constraint check and decision memory block is connected to the cyclone classifier feed density monitor and to at least one of the following overload constraints from the above corresponding monitors: (1) rod mill overload sound, (2) ball mill overload sound, (3) pump box high level, and (4) cyclone overflow high particle size and high/low density. A cascade con…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.