Method of separating a low density fly ash fraction from an overall group of fly ash
US6398848B1 · kind B1 · utility
2Cited by
34References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1999 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Apr 26, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of separating a low density fly ash fraction from an overall group of fly ash entrained in a gas stream including the steps of passing the gas through a duct having a first area; passing the gas stream from the duct through an expansion nozzle; passing the gas stream through the expansion nozzle and into a hollow body having a second area, whereby the second area is larger than the first area; decelerating the gas stream as it enters the expansion nozzle to separate out low density ash particles; and collecting the low density ash particles from a hopper positioned adjacent the expansion nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.