Method and device for the production of cement clinker
Assigneesthyssenkrupp Polysius GmbH, Vicat, Dyckerhoff AG
InventorsThomas Lappe, Eike Willms
Life of this patent
Estimating the term…
Abstract
A process for producing cement clinker may involve preheating raw meal in a preheater, calcining the preheated raw meal in a calciner, burning the preheated and calcined raw meal in a furnace to give cement clinker, cooling the cement clinker in a cooler, branching off a portion of the furnace offgases flowing out of the furnace as bypass gas, cooling the bypass gas in a mixing chamber with a cooling gas, and separating out dust present in the bypass gas. The cooling gas is formed at least partly or completely from the bypass gas and/or the calciner offgas and/or the preheater offgas. The cooling gas is introduced into the mixing chamber in a ratio of 2-10:1 relative to the bypass gas.
Claims6
A process for producing cement clinker, the process comprising:
- preheating raw meal in a preheater;
- calcining in a calciner the raw meal that has been preheated;
- burning in a furnace the raw meal that has been preheated and calcined to give cement clinker;
- cooling the cement clinker in a cooler;
- branching off a portion of furnace offgases flowing out of the furnace as bypass gas;
- and
- cooling the bypass gas in a mixing chamber with a cooling gas and separating out dust present in the bypass gas, wherein the cooling gas is formed at least partly or completely from at least one of the bypass gas, a calciner offgas, or a preheater offgas,
- wherein the cooling gas is introduced into the mixing chamber in a ratio of 2-10:1 relative to the bypass gas;
- wherein the cooling gas is formed partly or completely from a portion of the bypass gas that has been dedusted and cooled without passing back through the preheater, calciner, or furnace, wherein a portion of the bypass gas that is not fed to the mixing chamber is fed to at least one of the calciner, the furnace, or the cooler.
Dependencies are inferred from the claim text.