Experiment Study on New Processing of a Mixed Flotation of Recoverying Complex Copper-Lead-Zinc Polymetallic Sulphide Ore

The mine samples for this experimental study which were from Mozhugongka,Tibet,are typical complex lead-zinc copper polymetallic sulphide ore which are difficult to process.Based on the characteristics of the ore,we identify the flotation tests of copper,lead and zinc as a mixed Cu-Pb flotation,and then separate copper and lead,finally float zinc from the copper and lead tailings.The key technology of the process is as follows:(1)BP,Ammonium dibutyl dithiophosphate and xanthate were used as the collectors for the mixed flotation of copper and lead.(2)Sodium sulfide,zinc sulfate and sodium carbonate were used as the depressant of sphalerite.(3)Using activated carbon to absorb the collectors,which was used in Cu-Pb separation processing.(4)Adapting the combination of CMC,Na2SO3 and Na2SiO3 which were environment-friendly as the depressant of galena instead of toxic sodium dichromate.Through this technology,the difficult technical problem of copper and lead separation had been successfully solved and a refined beneficiation test indicator had been obtained.Upon the completion of laboratory testing,the industrial test had been made rapidly.This process first got its success in Mozhugongka ore concentrator,Tibet,2007.