PROCESS FOR THE RECOVERY OF METALS FROM POLYMETALLIC NODULES

Present disclosure concerns a process for the recovery of valuable metals. Two-stage process using SO2 in an acidic aqueous media is disclosed. In a first step, performed in mildly acidic conditions, Mn, Ni, and Co are dissolved; in second, more acidic step, Cu is dissolved. Under these conditions,...

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Bibliographische Detailangaben
Hauptverfasser:	DANIELS, Michel, SCOYER, Jean, LEYSSEN, Jan, NEVEN, Margot, BALTES, Michael
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:	Present disclosure concerns a process for the recovery of valuable metals. Two-stage process using SO2 in an acidic aqueous media is disclosed. In a first step, performed in mildly acidic conditions, Mn, Ni, and Co are dissolved; in second, more acidic step, Cu is dissolved. Under these conditions, the leachate of first step contains most of the Mn, Ni, and Co, while being nearly Cu-free. The Ni and Co are precipitated as sulfides; the Mn can be recovered as sulfate by crystallization. Cu leached in the second step, is selectively precipitated, also as sulfide. s Table: 4