METHOD FOR PROCESSING SUPER HARD ALLOY SCRAP

PROBLEM TO BE SOLVED: To separate or recover, from super hard alloy scrap, cobalt and tungsten and, if present, tantalum and/or niobium at high rates at extremely reduced cost and operating loads. SOLUTION: As the super hard alloy scrap, that having a ratio of passage through a sieve of 1 mm sieve o...

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Bibliographische Detailangaben
Hauptverfasser:	KINOSHITA MASANORI, UCHINO YOSHIJI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY DISPOSAL OF SOLID WASTE FERROUS OR NON-FERROUS ALLOYS METALLURGY PERFORMING OPERATIONS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS RECLAMATION OF CONTAMINED SOIL SOIL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To separate or recover, from super hard alloy scrap, cobalt and tungsten and, if present, tantalum and/or niobium at high rates at extremely reduced cost and operating loads. SOLUTION: As the super hard alloy scrap, that having a ratio of passage through a sieve of 1 mm sieve opening of ≥98wt.% is prepared. After the super hard alloy scrap is treated with a mineral-acid solution to elute the cobalt into the mineral-acid solution, solid-liquid separation is carried out to obtain the mineral-acid solution containing the cobalt and the scrap from which the cobalt is removed. COPYRIGHT: (C)2004,JPO