VERFAHREN ZUR RÜCKGEWINNUNG VON VERWERTBAREN METALLEN AUS EINER NICKEL-WASSERSTOFFZELLE

• Main Authors: KANEKO, AKIHITO, SANTOKU METAL INDUSTRY CO., LTD., KOBE-SHI, HYOGO 658, JP, OKADA, CHIKARA, SANTOKU METAL INDUSTRY CO., LTD., KOBE-SHI, HYOGO 658, JP, KITAZUME, NOBUYUKI, SANTOKU METAL IND. CO., LTD., KOBE-SHI, HYOGO 568, JP
• Format: Patent
• Language: German
• Published: 25.03.1999
• Edition: 6
• Subjects: APPARATUS THEREFOR; BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRICITY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A method comprising the steps of preparing crushed material by crushing nickel-hydrogen secondary cells; separating alkalis, organic substances, and iron from the crushed substance in order to obtain a separated material from which at least alkalis, organic substances, and iron are separated; burning the separated material to produce oxides of valuable metal to be collected; and processing the oxides by a molten salt electrolysis method by use of a molten salt bath for electrolysis. By this collection method, it is possible to efficiently collect electrode materials and others which are usable for nickel-hydrogen secondary cells. Further, compared to separation, refining, and smelting by ordinary chemical processings, this method realizes collection in a large quantity at a low cost.