Upgrading of phosphate ore
US4393030A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1982 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Jan 12, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05B1/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Phosphate is upgraded to remove slimes therefrom by a process which comprises the steps of: PA0 (a) contacting the phosphate ore with a phosphoric acid solution having a concentration of about 1 to 20 weight percent in a desliming unit for a sufficient time to form a suspension containing the slimes and the calcium and phosphate components; PA0 (b) passing said suspension through a solids separator to separate deslimed phosphate ore from the slime suspension and recovering the deslimed phosphate ore; PA0 (c) removing the slime suspension to a separator to separate the slime solids from the filtrate liquids; and PA0 (d) recycling the filtrate liquids to the desliming unit to provide at least a portion of the phosphoric acid solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.