METHOD OF RECOVERING PRECIOUS METALS FROM INTERMEDIATE PRODUCTS

FIELD: pyrometallurgy and precious metal recovery. SUBSTANCE: intermediate products are submitted to oxidative firing to produce cinder, which is melted in presence of massicot and carbonaceous reducing agent to collect precious metals in lead, cinder being preliminarily mixed with alkali and/or alk...

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Bibliographische Detailangaben
Hauptverfasser:	DUBININ N.A, KRAVTSOV E.D, DIGONSKIJ S.V
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	FIELD: pyrometallurgy and precious metal recovery. SUBSTANCE: intermediate products are submitted to oxidative firing to produce cinder, which is melted in presence of massicot and carbonaceous reducing agent to collect precious metals in lead, cinder being preliminarily mixed with alkali and/or alkali-earth metal halides, massicot, and carbonaceous reducing agent. Melting is effected at temperature higher than melting temperature of halide, after which mixture is aged at this temperature for further 0.5 h to concentrate lead collecting precious metals in its bottom phase. The latter is separated from oxides dissolved in alkali and/or alkali-earth metal halide melt. EFFECT: simplified process, reduced power consumption, and increased precious metal recovery. 2 cl