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C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
C22B19/00—Obtaining zinc or zinc oxide
C22B19/34—Obtaining zinc oxide
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FR373864D1906-06-121906-10-20Procédé chimico-métallurgique pour utiliser les calamines pauvres, en en extrayant le zinc à l'état d'oxyde
ExpiredFR373864A
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