Ultrafine grinding mill of which fed material flows down through an agitated bed composed of small grinding medium
US5257742A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1992 |
| Grant date | Nov 2, 1993 |
| Priority date | — |
| Expiry date | May 1, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C17/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An ultrafine grinding mill in which fed material flows down through an agitated bed composed of small grinding medium characterized in that the ultrafine grinding mill comprises a vertically arranged cylindrical housing, a net member having a mesh size preventing the grinding medium from passing therethrough and arranged at the bottom of the cylindrical housing, a rotary shaft arranged on a central axis of the cylindrical housing, and agitating blades mounted at several stages on the rotary shaft, and in that both a gap between the tip of each agitating blade and the inner surface of the cylindrical housing and a gap between the agitating blade of the lowermost stage and the net member are not more than 2/3 the diameter of the grinding medium at room temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.