Comminution of material
US4852811A · kind A · utility
10Cited by
4References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1988 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Mar 4, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C23/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Material is comminuted in a substantially dry state in a chamber (4) as a result of agitation by a rotor. During the process, gas is admitted to the chamber (4) through a foraminous base (8) to flow upwardly in a uniform manner across the cross-section of the chamber. Pulses of gas are directed periodically at the material through inlets (15) to prevent agglomeration of the material. The pressure of the gas admitted through the inlets (15) is higher than that admitted through the foraminous base (8). Surface active agents may be added to the material, also to prevent agglomeration, as well as, or instead of the use of pulsed gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.