Abstract: Method and apparatus to recover energy from waste by means of combustion of such waste in industrial furnaces, particularly of the rotary type, that has an external calciner, feeding such waste into the tertiary air duct of the calciner and burning the waste inside the duct itself, to efficiently make use of the energy produced by such combustion, as a contribution of the total cost of fuel necessary to operate the industrial furnace. The method and apparatus permit the elimination of hazardous wastes that are efficiently disassociated when burned sufficiently to produce effluents that are typically non-toxic, producing greatly reduced or even no atmospheric pollution nor environmental damage.

Abstract: Simplified heat-treatment in making aluminum alloys castings of the type improved by aging, especially for automotive engine cylinder heads and motor blocks. The castings, after solidification and extraction from their molds, each have an end product (workpiece) portion and a riser portion (the latter being ultimately cut off as waste). The workpiece portion of the casting is selectively quenched from solution temperatures down to about 120° C. by spraying water or other appropriate liquid preferably as a gas driven mist onto the surfaces of the workpiece while maintaining the riser portion of the casting essentially unsprayed at relatively significantly higher temperatures. After the quench, the residual reservoir of heat thus retained by said riser portion, by internal heat conduction, reheats the workpiece portion and maintains such workpiece portion for an effective time period within the temperature range for artificial aging, thus obviating any need for the aging furnace used by the prior art.

Abstract: The invention relates to a water-soluble demulsifying and antifouling agent capable of separating possibly emulsified water/hydrocarbon mixtures, and particularly water/crude petroleum mixtures containing suspended matter.Said agent comprises from 10 to 60 percent by weight of a combination of the following compounds:at least one quaternary tetraalkylammonium halide; andat least one polyalkyloxylated alkylenediamine or its sulfate.

Abstract: The invention relates to a method for the continuous cleaning of the inside of a tube in which a fluid circulates, in which method there is continuously driven in rotation within the tube by the fluid a movable element, one end of which is fastened to one end of the tube through a mechanical linkage permitting it to rotate freely on itself about the axis of the tube. In accordance with the invention, the movable element comprises at least one sharp edge designed to scrape the inner surface of the tube, this edge being disposed so that during the rotation of the movable element it is, along every cross section of the tube, the portion of the movable element farthest removed from the axis of the tube.