Process of making cement clinker and apparatus for performing said process
US4913742A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1983 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Dec 5, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/125
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing cement clinker, having a preheating-, calcination and cooling zone, under addition of a secondary fuel, (retardedly)combustible components such as waste materials and/or conventional fuels being added in the zone between kiln inlet and calcination zone and then being subjected to an incomplete combustion and/or pyrolysis under addition of exhaust gases from the burning process. The gases thus formed are introduced into the calcination zone as secondary combustion gas together with the exhaust gas from the burning process and are burned there with tertiary air and optionally with conventional secondary fuel. The plant required for performing the process consists of a system of heat exchangers (2), a calcining kiln (3a), a burnin kiln (10) and a clinker cooler (13). The calcining kiln (3a) is provided with a means (4) for introducing tertiary air and/or oxygen preferably preheated (m) in the clinker cooler (13) and optionally with a means (15) for introducing a conventional fuel. At least one each line (7) is provided for the introduction of raw material into the kiln and at least on each line (6) is provided for discharging the exhaust gases formed in the com…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.