FIELD: metallurgy.
SUBSTANCE: procedure consists in desorption of copper with cyanic solutions containing cyanic sodium (NaCN). Also, desorption is carried out with cyanic solutions containing ammonium carbonate (NH4)2CO3 at ratio NaCN/(NH4)2CO3=1-3:50 at temperature as high, as 60°C.
EFFECT: increased extraction of copper into eluate at reduced consumption of cyanide; replacement of eluate composition with more efficient one and reduced expenditures for neutralisation of reagent.
2 cl, 1 dwg, 1 tbl, 6 ex
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