Method of and plant for grinding pulverulent or granular materials
US4582260A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1983 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Nov 15, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C2015/002
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A vertical roller mill has a grinding table (1), rollers (3) and a separator (6) for separating ground material, which is conveyed to the separator in an air stream supplied through an inlet (7), into a fine fraction, which passes out through an outlet (8), and a coarse fraction which is returned for further grinding through an outlet (10). A part of the ground material is conveyed through an outlet (11) to a second separator (13), where it is separated from the air and returned for further grinding via an outlet (14) and an inlet (9) for fresh material to the mill. This provides a flatter grain size distribution curve in the finish ground material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.