Process for forming fluorspar compacts
US4139587A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1977 |
| Grant date | Feb 13, 1979 |
| Priority date | — |
| Expiry date | Dec 9, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B9/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An improved process for preparing compacts of finely divided fluorspar for metallurgical use is provided in which water, hydrated lime and molasses are added in specified ratios to fluorspar in a heated mixing vessel. The water facilitates the formation of a lime-molasses coating on the fluorspar particles and impedes reaction of the lime and molasses. The water also provides evaporative cooling of the mixture, subsequent to the mixing operation, causing the molasses to become much more viscous and, resultingly, the mixture to be much less tacky so that it can be efficiently compacted immediately. Following compaction in a compacting machine the compacts are heated in an oven to force the lime and molasses reaction to completion providing a water insoluble binder for the fluorspar particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.