Continuous alumina feeder
US5476574A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Sep 29, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/14
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A continuous feeder for feeding alumina to an aluminum reduction cell is positioned over a discharge outlet (114) of an alumina hopper. The feeder includes a flow control valve member (140) which is connected to a positioning means (132) by rod (142). The flow control valve member (140) includes a tapered section such that varying the vertical position of member (140) varies the clearance between the member (140) and an outlet orifice, which allows control over the flow rate of alumina from the hopper. The alumina flow control means is preferably mounted within an elongate tubular member (130), which is further mounted inside a housing (120). Housing (120) allows for removal of the flow control means for maintenance without having to first empty the hopper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.