Pulverizing and classifying apparatus with improved tailings and contaminant take-out control
US4196860A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1978 |
| Grant date | Apr 8, 1980 |
| Priority date | — |
| Expiry date | Oct 4, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C13/13
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A horizontal axis pulverizing and classifying apparatus characterized by a plurality of gas flow passages in a narrow band surrounding the classification zone and directed generally radially inward, and means for selectively and variably introducing gas to those passages. The apparatus may also be fitted with special means for removing contaminating particles which reduce the capacity and efficiency of such apparatus. The take-out device is a porous tubular duct communicating with the classification zone of the apparatus through the housing wall. The porous tubular duct is surrounded by a non-porous tubular casing forming an annulus connected to a source of gas under pressure. Control over the quantities of tailings recycled and over quantities of contaminants removed is exercised by varying the amount and pressure of gas introduced through the gas flow passages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.