Vertical roller mills
US4489895A · kind A · utility
16Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1983 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Mar 14, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C2015/002
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vertical roller mill has a rotary grinding table (1), grinding rollers (3) and a nozzle ring (13) surrounding the table for providing an air stream to entrain ground material. Downstream of each roller is a scraper (20) with a nozzle for directing a blast of air onto the crushed material leaving the roller to break up the material so that finer fractions pass into the conveying air stream and coarser fractions are carried on the table to the next roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.