Fine grinding roller mill
US7665681B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 2007 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Apr 10, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C23/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A roller mill for pulverizing material and separating the pulverized material has a mill for crushing the material and a classifier disposed on the mill for separating the crushed material. The mill includes a grinding mechanism that has a plurality of grinding rolls and a grinding ring that coact to pulverize material within a mill housing, which defines a grinding chamber. The classifier is a centrifugal-type classifier having a motor-driven rotor disposed within a classifier housing, which define a classifying chamber. The rotor has a plurality of blades that extend outwardly from the rotor. As the rotor rotates within the classifying chamber, the blades separate fine sized particles from oversized particles by passing the finer sized particles through the blades, and contacting and propelling the oversized particles against the classifier housing. The oversize particles fall downward through an outer annular passage defined by a baffle and the mill housing back to the grinding mechanism. The baffle is disposed along the inner periphery of the mill housing spaced at a distance from the mill housing to provide an inner passage and an outer annular passage. The inner passage direc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.