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 )) expertise - hydrometallurgy |
METALLOIDS
• Often occurring in conjunction with value metals eg Cu, Ni, PGE etc
• Pb, Bi, As, Sb, Se, Te, etc
Leaching processes
• pressure oxidation
• pressure metathesis
• alkali sulphide leaching
• pressure nitrogen process
• pressure alkali leaching
Recovery
• often immobilised to satisfy legislation
• selenium and tellurium recovery using precipitation and reduction processes.
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