Process for grinding limestone to predetermined particle size distribution
US5375779A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1993 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Dec 20, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB02C23/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A novel process for grinding limestone to a predetermined particle size distribution is disclosed. The process comprises feeding a feedstock of limestone to a roll grinder having a pair of opposing rotating rolls having a smooth surface, the rolls being separated by a predetermined nip or gap and having a predetermined circumferential velocity, and grinding the limestone between the rolls to a particle size distribution including particles in a range of about 75% to about 90% by weight greater than 200 mesh to produce a limestone product. Optionally, particles larger than about 14 to 16 mesh are removed, in a separator, and refed to the roll grinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.