METHOD FOR PROCESSING WASTE MATERIALS FROM VOLFRAM- COBALT ALLOYS

This method is an application for the field of metallurgy. The method provides the obtaining of final products - high purity tungsten trioxide and cobalt oxide which can be used for producing hard alloys. The technological scheme is simplified and in addition a high degree of extracting of valuable...

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Bibliographische Detailangaben
Hauptverfasser:	KRIVENCHEVA, LILJANA P, KHRISTOV, ATANAS P, ANGELOV, KHRISTO A, KHRISTOV, GEORGI T, TOPALOV, BORIS G
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	This method is an application for the field of metallurgy. The method provides the obtaining of final products - high purity tungsten trioxide and cobalt oxide which can be used for producing hard alloys. The technological scheme is simplified and in addition a high degree of extracting of valuable components is ensured. The waste materials from tungsten-cobalt alloys are rendered in powder state by firing in air and in an oxygen environment at a temperature of 800-900 degrees C. After mixing and wetting with sulphuric acid the obtained powder-like mixture from tungsten oxides and cobalt is fired at a temperature of 200-470 degrees C. The product that is obtained is leached with water. The quantity of sulphuric acid for wetting the powder-like mixture is 15% - 40% of the weight of the mixture.