Air classifier system for the separation of particles
US6631808B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 2001 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Aug 7, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07B4/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air classifier with enhanced air flow which maybe used for the simultaneous recovery of two or more distinct grades of foundry quality sand from a single sand stream. The air classifier exhibits improved performance by drawing into the classification chamber, through the use of suction, incoming air through a honeycomb followed by a screen section having two or more screens. The honeycomb removes swirl in the air and the screens slow down the fast moving air more than the slow moving air. After passing through the screens, the velocity profile of the air in the chamber is flat across the inlet flow path and, as a result, improved classification performance is achieved. Classification performance may be further enhanced through the use of a vibrating screen feeder for spreading the incoming particle stream before entrainment in the air flow within the classifier and through upward flowing air in one or more product receiver sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.