Method for recovering gold and silver from picking waste liquid

The invention discloses a method for recovering gold and silver from picking waste liquid. The method for recovering gold and silver from the picking waste liquid comprises the steps that dense sedimentation is conducted on the picking waste liquid, and filter pressing is conducted on dense base flo...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	QIAO ZHAN, CUI CHONGLONG, FEI YUNLIANG, YANG MINGYUAN, ZHANG WEI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention discloses a method for recovering gold and silver from picking waste liquid. The method for recovering gold and silver from the picking waste liquid comprises the steps that dense sedimentation is conducted on the picking waste liquid, and filter pressing is conducted on dense base flow, so that filter residues are formed; the PH value of dense supernate and the PH value of filter liquor are adjusted after the dense supernate and the filter liquor are adsorbed through active carbon, and the dense supernate and the filter liquor are discharged in a collection tank after being alkaline; finally, the filter residues and the active carbon are treated through the wet-process gold extraction technique after being dried and made into ash, so that gold and silver are obtained. By the adoption of the method, the precious metals such as gold and silver in the picking waste liquid are recovered, and economical benefits are improved.