Abstract: A process for the econimic recovery of metallic fractions generated during operation of a cupola furnace comprises the steps of the separating filter dust containing metal fractions from an off-gas stream and recirculating the metal fraction back to the cupola furnace for combustion with additional feedstock so as to enrich the metallic concentration of the filter dust to a level where economic recovery of the metallic fraction can occur.

Abstract: A process for the impact healing of inner discontinuities or defects in the surface area of a cast workpiece where the defects are localized comprises locating an explosive charge on the surface of the workpiece over the inner discontinuities or defects and detonating the explosive charge.

Abstract: A process for treating molten cast iron in an open ladle by means of pure magnesium is proposed, wherein the pure magnesium is introduced in a multiplicity of very small magnesium particles, coated with a protective layer, into the molten cast iron.The protective layer, which protects the magnesium from premature melting and controls the reaction rate, is produced from ceramics.The process can be carried out with very simple equipment. Involved pretreatments of the treatment agent are unnecessary.

Abstract: The method of manufacturing the compound camshaft comprises the steps of placing cast journal or bearing elements and/or cast cam elements on a camshaft body and fixedly connecting or securing such elements at the camshaft body. The cast journal or bearing elements and/or the cam elements contain an opening which is bounded by an internal profile or contour having a configuration which is governed by the type of connection to be made between such elements and the camshaft body. The internal profile or contour may be of a substantially conical shape and is at least partially left in a mechanically untreated condition. The compound camshaft thus obtained is optimized with respect to wear and weight and there are neither required cost-intensive and time-consuming operations, especially machining operations, nor complicated working steps during the manufacturing process.

Abstract: A process for the production of nodular cast iron is disclosed. The process comprises adding magnesium to molten iron and then desulphurizing the melt. Next, the melt is after-treated with a neutral gas. The neutral gas which is introduced into the melt may be Ar, N.sub.2, CO.sub.2, or any combination thereof. The after-treatment with the neutral gas scavenges the melt for nonmetallic inclusions. The after-treatment may be performed by blowing the gas into the melt in a known manner using blowing lances or through a porous plug. In a preferred embodiment, the melt is also carburized by treatment with a gaseous hydrocarbon.

Abstract: An armour plate (1) comprises cavities (2), which are arranged with a plurality of packing bodies (3) in an irregular or regular shape relative to each other. The packing bodies are hollow-bodied, preferably spherical or tubular, and consist of a non-metallic material, preferably glass or ceramic. The interspaces between the packing bodies are filled out with a plastics, preferably a foam made for example of polyurethane.

Abstract: A method of keeping inductor spouts, downgates and outlet casting channels and the like free of deposits during the production of a cast iron melt involves treatment with pure magnesium. Such deposits, which occur as reaction products and block the channels causing considerable maintenance expense, are prevented by the use of pure magnesium. The cast iron melt is flushed free of suspended highly basic reaction products, such as MgO, CaO, Al.sub.2 O.sub.3, FeO and MgS, in a predetermined magnesium treatment of the cast iron melt with pure magnesium by a simultaneous evaporation of magnesium not consumed in the magnesium treatment. By preventing the formation of deposits, the life of the vessel used is increased and maintenance costs are decreased.

Abstract: In the production of a body of filled plastics material, it is started from a self-supported article with open pores which can be obtained in the conventional manner. A reaction material is placed in the pores of the molded article. The pores of the molded article are sealed prior to final hardening. This can be done by means of an ultraviolet radiation source. Prior to sealing, the molded articles, without the danger of leakage of the reaction material, can be temporarily placed in a glycol/glycerol bath. The polyester resin of the coating is irradiated with UV through the glycol or glycerol bath.