Method and apparatus for recycling cement kiln dust
US6416574B1 · kind B1 · utility
65Cited by
33References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2000 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Nov 27, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B7/428
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Methods for recycling cement kiln dust are described and involve heating a mixture containing at least one additive, water, and cement kiln dust for a sufficient time and at sufficient temperatures to form cement clinker. The additive contains an organic polyacid, a hydroxy carboxylic acid, a polycarboxylic acid, a saccharide, a carbohydrate, a salt thereof, or combinations thereof. A cement slurry containing water, cement kiln dust, and the above-described additive is also described as well as apparatus for recycling the cement kiln dust.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.