Process and equipment for the determination of grain size distribution of particles in suspension
US4793706A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Jan 9, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/62
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and an associated process are described for the determination of grain size distribution of particles in suspension. The suspension is settled in a settling tank and optical density measurements of the suspension are taken and from this the grain size distribution is determined. According to the invention, the suspension is homogenized by circulating it in the settling tank, then circulating is stopped and the optical density is repeatedly measured in the settling tank on at least three points with deviating spacings. The equipment described is a settling tank (1) for the suspension, a device for the measurement of optical density in the settling tank (1) and a computing unit calculating the grain size distribution from the optical density values measured. The settling tank (1) is equipped with a means for the circulation of the suspension and there are at least three measuring heads (2,3,4,5,6) along the settling tank (1) sensing the optical density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.