Method for dewatering the sludge layer of an industrial process tailings pond
US4399038A · kind A · utility
11Cited by
8References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 8, 1982 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Jan 8, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/901
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In order to compress the sludge layer of an industrial process tailings pond, in a naturally occurring fines-containing body of water, beyond the density which it will naturally reach after treatment by the addition of a specific hydrolyzed starch additive, sand is distibuted over the sludge layer as a water permeable surcharge which, by weight, further compacts the sludge to obtain additional dewatering. The hydrolyzed starch additive is selected from a specific family and provides improved shear strength and permeability characteristics to the sludge layer such that it can support the sand surcharge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.