Method for processing coal preparation plant washings for elimination of sludge ponds
US4695324A · kind A · utility
1Cited by
3References
2Claims
0Family size
Inventor
Key dates
| Filing date | Jan 9, 1984 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Jan 9, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S106/90
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The solids concentration obtained from the aqueous suspension derived from coal beneficiation plant streams can be promptly processed in stabilized load bearing mass by passing these solids plus proportionally added portland cement powder thru a temperature controlled pug mill. The product is then delivered to a fill area for disposal. This eliminates the need for ponds and permits the immediate reuse of water in the plant. Major economies in land purchases, waste treatment, water requirements, and operating costs are effected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.