Experimental Research on Mineral Processing of a Copper-lead-zinc Ores in Tibet

Certain a copper-lead-zinc multimetallic ore in Tibet contains copper 1.77%,lead 0.97%, zinc 1.8%, and silver 118.26 g / t. A study on the separation process undertaken for the comprehensive recovery of the metals in the ore, and different processes were compared.The confirmed optimizing flowsheet included copper-lead bulk flotation, separation of copper and lead from the bulk rough concentrates and beneficiating zinc from tailings. CMC, sodium silicate and potassium dichromate as combined depressants for lead mineral is used to separate copper and lead. The closed-circuit test is as followings: copper concentrate containing copper29.35% with copper recovery 93.55%, the lead concentrate contains 45.78% of lead, 4 692.00 g / t of silver with lead recovery 76.14%, zinc concentrate containing zinc 45.50% with zinc recovery 72.75%. The total recovery rate of silver in copper concentrate and lead concentrate was 88.81%. In these ways, the beneficiation effects is better, and comprehensive utilization of the resource can be realized well.