Apparatus for the decomposition of sodium aluminate liquor for the production of alumina
US4818499A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1987 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | May 12, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/662
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A grading decomposer apparatus for continuously decomposing a liquor of sodium aluminate supersaturated in alumina comprises a cylindrical-conical tank for containing the liquor, having an upper cylindrical portion and an overflow generally peripherally disposed in the upper portion. A centrally disposed tubular element passes from above into the upper portion of the tank; the tubular member terminates in the cylindrical portion of the tank below the overflow. The apparatus also includes an off-take from the lower portion of the tank to an outlet; liquor is recycled from the lower portion of the tank to the upper portion within the tubular element and below the overflow, and liquor is introduced into the upper portion of the tank within the tubular element and below the overflow. A static disperser is disposed within the tubular element, the liquor feed and the recycled liquor inlet in order to create a feed and tranquilization zone within the tubular element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.