Impact pulverizing mill with an attrition chamber and a vertical airflow classification chamber
US4077574A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 1976 |
| Grant date | Mar 7, 1978 |
| Priority date | — |
| Expiry date | Apr 13, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C2013/28672
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A mill for the pulverizing and classification of particles utilizing an impact rotor to obtain the reduction of large chunks and particles of materials by impaction between lining plates and hammers mounted on the rotor. The lining plates are mounted on adjustable walls of an impact reduction chamber in a position to be impacted by the particles thrown from the impact rotor hammers. Particles are then carried by vertical air flow into vertically stacked classification chambers which are located directly above the attrition chamber. Gravity and deflector plates cause the return of some of the particles which receive a secondary impact with the impact rotor producing a continuous interchange of particles and resulting in the autogenous attrition of the particles between the rotor and lining plates. Another feature of the present invention is the utilization of a "fluidizer" to maintain the flow of particles which accumulate at the bottom of the impact reduction chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.