C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/369
C22B 3/00 (2006.01) C22B 3/10 (2006.01) C22B 7/02 (2006.01) C22B 15/00 (2006.01)
Patent
CA 1096636
ABSTRACT OF THE DISCLOSURE The specification discloses a hydrometallurgical process for the selective dissolution of mixtures of metallic oxy compounds. It relates particularly to the selective putting into solution of certain non-ferrous metals present in these mixtures. In order to extract the metal or metals, it is necessary to separate one from the other and, in particular to separate iron which is very often present in minerals of non- ferrous metals and which is then found in variable proportions in the first stages of the purification of these metals. This specification discloses a process for the selective dissolution of oxides of non-ferrous metals which permits their separation from iron, manganese and silica. Thus this specification discloses a process for the selective dissolution of oxygen- containing metallic compounds, characterised by the fact that it comprises the following successive steps: a) The mixture of compounds is put into suspension in an aqueous phase and b) the suspension is treated with chlorine, the pH of the suspension being kept at a value above 2, or preferably above 3, whereby any iron, manganese, silica and cobalt remain undissolved in the suspension.
270495
Demarthe Jean-Michel
Fossi Paolo
Gandon Louis
Gowling Lafleur Henderson Llp
Minemet Recherche
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