Abstract: A method and apparatus for continuously feeding hazardous waste fuels having a relatively high solids content to a rotary cement kiln by delivering the fuel to a feed hopper with screw-conveyor which transfers the fuel to a filling zone where a piston pump capable of pumping a composition having a solids content of at least 40% with particle sizes up to a maidmum of 2 inches continuously charges the fuel through a conveyance tube into a feed tube which introduces the fuel into the kiln through the feed end housing.

Abstract: A method and apparatus for treating the exhaust gases of a combustion process, the exhaust gases comprising in part condensable or solidifiable particulate matter and residual hazardous organic compounds and emanating from the combustion process at a first temperature, by heating a portion of the exhaust gases using a heating means within a bypass means to a second temperature higher than the first temperature, maintaining the heated exhaust gases within the bypass means at the second temperature for a time sufficient to render the desired poriton of the residual hazardous organic compounds harmless, and then cooling the heated exhaust gases using a quench means within the bypass means to a third temperature lower than the first temperature in a period of time short enough to prevent the condensable or solidifiable particulate matter from condensing or solidifying on and adhering to the bypass means.

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.