Method for producing a hydraulic binder
AssigneeSouthdown, Inc.
InventorsMichael von Seebach, J. Bruce Tompkins
Life of this patent
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Abstract
A method for producing a hydraulic binder using partially calcined raw meal entrained in the kiln off gases. The raw meal flow form the lowermost cyclone is interrupted at or near the junction of the meal chute, kiln inlet and riser duct. This flow interruption causes turbulence in the partially calcined meal facilitating dust entrainment in the gas. The splash plate can be selectively adjusted to entrain more or less raw meal. The entrained meal is drawn off from the riser duct through a kiln bypass duct, processed and hydrated to convert the calcium oxide in the meal to calcium hydroxide.
Claims10
A method for producing a hydraulic binder using a cement clinker production facility of the type having a rotary kiln fed by one or more preheater stages, comprising the steps of:
- (a) introducing ground raw cement meal into the preheater stage of the cement clinker production facility for movement along a path of travel;
- (b) directing gas from the rotary kiln against the raw meal, the raw meal being thereby pre-heated and partially calcined;
- (c) creating a mixture of the gas from the rotary kiln and pre-heated raw meal by entraining a portion of the pre-heated raw meal in the gas;
- (d) directing a bypass portion of the mixture into a bypass system;
- (e) separating the gas in the bypass portion of the mixture from the raw meal;
- and
- (f) hydrating the raw meal to form the hydraulic binder.
Dependencies are inferred from the claim text.