5. Mineralurgy
In most cases, rhenium recovery involves concentrating molybdenite from copper-molybdenum porphyries (figure 1 ).
• The first stage of the recovery process consists of global flotation of copper (chalcopyrite) and molybdenum sulfides to give a mixed concentrate, using collectors (xanthates or dithiophosphates), a basic pH regulator (lime) and a foaming agent (methyl isobutyl carbinol, MIBC).
• The concentrate is then treated by decomposing the adsorbed xanthates by roasting at around 400 ˚C (Utah process) or by steam heating, or by depressing the chalcopyrite with ferrocyanide, hypochlorite...
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Mineralurgy
Metallurgy
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