Vertical roller mill
US4715544A · kind A · utility
11Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1986 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Oct 29, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C15/001
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vertical roller mill has stationary grinding rollers which roll over a grinding path (4) of a rotatable grinding table (1), and a surrounding nozzle ring (7) for conveying and separating air. A coarse fraction of ground material is entrained upwards and radially inwards over an inclined outer wall (19) of a screen (15) and is directed downwards by an overlying guide wall (16) onto an inclined inner wall (20) of the screen (15) and hence back to the grinding table (1) for further grinding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.