Elimination of iron from leaching solutions

C - Chemistry – Metallurgy – 22 – B

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53/295, 53/329

C22B 3/44 (2006.01)

Patent

CA 1222871

ABREGE DESCRIPTIF L'invention concerne un procédé d'élimination sélective du fer de solutions acides chlorées provenant de la lixiviation de minerais sulfurés complexes en vue de la production de métaux non ferreux. Selon le procédé, on oxyde en fer ferrique le fer ferreux présent dans la solution puis on filtre et lave le précipité de fer ferrique ainsi formé. Pour effectuer cette oxydation on introduit un gaz oxydant dans ladite solution et on augmente, de façon continue, en fonction du temps la pression partielle de l'oxygène dans ledit gaz. L'invention s'applique aux solutions provenant de l'attaque hydrométallurgique du zinc.

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