Apparatus for pneumatically separating fractions of a particulate material
US4230559A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1978 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Nov 22, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB07B4/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pneumatic material separator having adjacent generally vertical sorting ducts and a generally vertical discharge duct communicating with the tops of the sorting ducts is disclosed. Particulate material introduced into a first sorting duct is separated by an upwardly moving column of gas into an upwardly moving lighter fraction and a downwardly moving heavy fraction. The lighter fraction is carried to a position over a second sorting duct where the gas velocity is reduced. The heaviest particles of the lighter fraction fall into the second sorting duct while the remainder of the lighter fraction is discharged through the discharge duct.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.