Abstract:
A high pyrrhotite type copper-lead-zinc polymetallic ore in Qinghai contains 35.00 % pyrrhotite and 6.00 % pyrite. Conventional flotation process can not effectively inhibit the flotation of pyrite and pyrrhotite and separate valuable elements. By adopting the magnetic separation-mixed flotation of copper, lead and sulfur-zinc recovery from tailings process, closed circuit test obtains good index: copper grade is 13.15 %, lead grade is 7.59 %, copper recovery rate is 75.10 %, lead recovery rate is 69.49 % in mixed concentrate of copper and lead; zinc grade is 48.05 %, zinc recovery rate is 76.33 % in zinc concentrate; the separation and recovery of each primary element is realized.