Georg Fischer Aktiengesellschaft

Karl Gut

Ivo Henych

Walter Gysel

Urs Gerber

Erwin Fischer

Klaus Hornung

Walter Greulich

Peter Hofer

Guther Schulte

Rolf Rietzscher

Marcel Voegeli

Hans-Ludwig Roes

Haiko Schneider

Werther Lusuardi

Erich Gerber

Wolfgang A Matejka

Roland Baggi

Eduard Rogg

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.

Method for the concentration of dusts in a cupola furnace with metal

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.

Process for the impact healing of inner discontinuities or defects in

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.

Process for treating molten cast iron in an open ladle by means of pure

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.

Compound camshaft and method of manufacturing the same

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.

Process for the production of nodular cast iron

Armor and a method of manufacturing it

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.

Method of keeping inductor spouts, downgates and outlet channels free of

Method for forming a coated article including ultra-violet radiation of

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Benken, Switzerland

Karl Gut