Center-feed nozzle in a contained cylindrical feed-inlet tube for improved fluid-energy mill grinding efficiency
US7959095B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2007 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Jan 18, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C19/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a supersonic center-feed nozzle system within the feed-inlet tube of a fluid-energy mill used for grinding particulate material such as titanium dioxide. Particularly, in the feed-inlet tube of the present invention, particulate material is introduced into the supersonic feed jet of primary grinding fluid in almost a perpendicular fashion, with the supersonic nozzle installed in the center of the particulate material core, imparting momentum to the particulate material. The momentum entrains the particulate into the main grinding chamber of the feed-inlet tube. In the main grinding chamber of the feed-inlet tube, a secondary stream of grinding fluid, introduced annularly, constricts the primary jet's divergent flow, enabling a higher turbulent mixing of the grinding fluids and the particulate material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.