Co-Extraction - Selective Stripping for the Recovery of Nickel and Copper from the Leach Liquor of Ocean Nodules

Pandey, B D and Bagchi, D and Kumar, Vinay (1994) Co-Extraction - Selective Stripping for the Recovery of Nickel and Copper from the Leach Liquor of Ocean Nodules. The Canadian Journal of Chemical Engineering, 72 (4). pp. 631-636.

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Ferromanganese deep sea nodules of the Indian Ocean have recently been recognised as a potential source of metals like copper, nickel, cobalt and manganese. For the treatment of the sea nodules following the reduction roast-ammonia leach process, the leach liquor containing copper, nickel and cobalt was processed to separate and recover these metals by solvent extraction (SX) using 25% LIX 64N in kerosene. Almost quantitative extraction of copper and nickel was realized in a continuous run. During nickel stripping, the small amount of copper in the nickel solution was removed by incorporating a copper extraction step using 10% LIX 64N in kerosene. The purified pregnant nickel electrolyte was electrowon in a non-diaphragm cell. Copper was similarly recovered by electrowinning (EW). A closed circuit of SX-EW was run to produce cathodes of nickel and copper with energy consumptions of 3.85 and 2.01 kWh/kg for the respective metals.Les nodules de ferromanganese des eaux profondes de l'Ocean Indien ont ete reconnus recemment comme etant une source potentielle de metaux tels le cuivre, le nickel, le cobalt et la manganese . Pour le traitement des nodules marins suivant le procdde de reduction par lavage a ('ammoniac grille, la liqueur de lavage contenant du cuivre, du nickel et du cobalt a dtd traitde pour separer et rdcupdrer ces metaux par extraction des solvants (S X) avec 25% de LIX 64N dans du kdrostne. L'extraction quasi totale du cuivre et du nickel a ete realisee en fonctionnement continu.Lors de ['extraction du nickel, la faible quantite de cuivre dans la solution de nickel a ete retiree en introduisant une tape d'extraction avec 10% de LIX 64N dans du kerosene. L'electrolyte purifie riche en nickel a subit une xtraction par la methode dlectrolytique dans une cellule sans diaphragme. Le cuivre a ete extrait egalement de fawn electrolytique (E W). Un circuit ferme de SX-EW a ete realise pour produire des cathodes de nickel et de cuivre avec des consommations d'energie respectives de 3,85 et 2,01 kWh/kg.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Sea nodules; solvent extraction
Divisions:Metal Extraction and Forming
ID Code:2526
Deposited By:Sahu A K
Deposited On:10 Mar 2011 09:35
Last Modified:07 Feb 2012 14:32
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