C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 3/44 (2006.01) C22B 15/00 (2006.01)
Patent
CA 2530354
The invention relates to a method for processing concentrates, particularly concentrates produced from copper sulfide-based ores. According to the method, the concentrate (4) to be processed, obtained from ore concentration, is divided into two parts, to a concentrate (7) mainly containing poorly soluble components, and to a concentrate (8) mainly containing well soluble components. The concentrate (8) containing well soluble components is conducted to a leaching step (9), and the solution (13) obtained from said leaching step is conducted to at least one conversion step (11, 16), and to the conversion step (11) that is located first in the flowing direction, there is fed the concentrate (7) containing poorly soluble components. In the conversion step (11) that is located first in the flowing direction, at least the copper contained in the solution is converted into sulfidic form by means of the sulfide-form iron of the concentrate (7) containing poorly soluble components, and at least part of the solution (12) obtained from the conversion step (11, 16) is returned to the leaching step (9).
L'invention concerne un procédé pour traiter des concentrés, en particulier des concentrés produits à partir de minerais à base de sulfure de cuivre. Selon ce procédé, le concentré (4) à traiter obtenu à partir de la concentration de minerai est divisé en deux parties, d'une part un concentré (7) contenant principalement des éléments peu solubles, et d'autre part un concentré (8) contenant principalement des éléments très solubles. Le concentré contenant des éléments très solubles est soumis à un processus de lixiviation (9) et la solution (13) obtenue est soumise à au moins une opération de conversion (11,16), la conversion (11) située la première dans la direction du flux étant alimentée par le concentré (7) contenant des éléments peu solubles. Dans l'opération de conversion (11) située la première dans la direction du flux, au moins le cuivre contenu dans la solution est converti en sulfure au moyen du fer sous forme de sulfure du concentré (7) contenant des éléments peu solubles, et au moins une partie de la solution (12) obtenue à l'opération de conversion (11,16) est à nouveau soumise à une lixiviation (9).
Heimala Seppo
Ruonala Mikko
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Outokumpu Technology Oy
Outotec Oyj
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