Process for producing cement clinker containing coal ash
US5837052A · kind A · utility
15Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1997 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Apr 10, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/49
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Contaminated coal ash, for example flyash contaminated with carbon is introduced to hot clinker in a cooler downstream of a cement kiln; the carbon is combusted in the cooler to provide a cement clinker having an effective content of flyash free of carbon; this permits use of flyash contaminated with carbon without the need for separate special steps for carbon removal; volatile contaminants or contaminants having a volatile component, for example adsorbed ammonia are similarly removed in the cooler by volatilization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.