Application of New Combination Inhibitors in Copper Lead Separation Flotation
Aiming at the technical problems of similar floatability of copper-lead sulfide ore and high mutual content of copper and lead in concentrate,this paper focused on the experimental of copper-lead separation of a copper-lead bulk flotation concentrate,aiming at improving the flotation index of copper-lead concentrate.The sample was a copper-lead mixed flotation concentrate from Yunnan.The analysis showed that the sample contained 8.32%copper,31.56%lead and 93.55%copper sulfide.The lead sulfide accounts for 94.59%of the total lead.The particle size analysis showed that the copper-lead bulk flotation concentrate with a particle size below-0.045 mm accounts for 85.89%.The particle size was fine and the separation was difficult.The effects of the dosage of activated carbon+sodium sulfide,the type and dosage of inhibitor,and the dosage of collector on the flotation index were investigated.The optimum reagent system was determined as follows:The dosage of activated carbon+sodium sulfide was 1 400 g/t+2 000 g/t,the dosage of inhibitor(F1+C2)was 100 g/t+100 g/t,and the dosage of collector Z-200 was 20 g/t.The suitable process flowsheet was determined by the process structure to carry out the open circuit and closed circuit tests of flotation.The test results showed that the copper concentrate with copper recovery of 90.66%,grade of 20.96%and lead content of 4.95%was finally obtained by the closed-circuit test through the process of'one roughing,two cleaning and one scavenging'.The lead grade was 44.53%,the lead recovery was 94.87%,and the lead concentrate containing 1.05%copper.The separation effect of copper concentrate and lead concentrate was good,which could effectively reduce the mutual content of copper and lead in concentrate,realized the efficient recovery of copper and lead,and provided technical support for the utilization of copper-lead mixed flotation concentrate.The new combined inhibitor(F1+C2)had a good inhibitory effect on galena,while the inhibitory effect on chalcopyrite was relatively weak.The inhibition mechanism may be that the hydroxyl and carboxyl groups in F1 and C2 molecules interact with galena to inhibit the floatability of galena.The new combined inhibitors are low-cost,widely used organic agents,environmentally friendly,and the dosage of agents is small,the effect is significant,and it has a good application prospect.
copper lead separationactivated carbon drug removalnew combination inhibitorsflotation
万方数据
