Crust breaker and ore dispenser
US7892319B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2008 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Oct 9, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C3/14
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A crust breaker and ore feeder device for electrolytic aluminum smelting employs an in-line three-position pneumatic cylinder capable of moving the plunger shaft to a fully raised position, to a fully lowered position, and to an intermediate, partly lowered position. The full stroke is used for a conventional combined ore dispensing and a crust breaking operation; a partial stroke between the fully raised position and the intermediate position permits ore dispensing without a crust breaking; and a partial stroke between the intermediate position and the fully lowered position permits crust breaking operation without ore feeding. The cylinder can take form of a tandem cylinder having upper and lower axially aligned cylinder portions, with rods not connected to one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.