Study On Flotation Experiment Of Refractory Copper From Qinghai

The paper investigated a copper ore from Qinghai, using the process of floating supper and inhibiting sulfer to recovery copper mineral. The ore, accompanying a variety of useful elements, belong to the high sulfur copper ore and is mainly made up of sulfide ore in which the metal minerals are mainly chalcopyrite, pyrite, magnetic prite and so on. The test is to use a new efficient agent, focusing on the study of collertor choice and recovery improvement in the process of floating copper. Through the screening test, flotation test chose PLQ as collector、lime as adjustment agent and2#oil as foaming agent to separate copper and sulfur effectively.The actual ore tests include collector selection test and agent include PLQ、 MOS-2and MA-1、D325, in which the best is PLQ, good dressing indexes and strong selection of copper ore. The closed-circuit test results of middling regrinding, using the principle of preferential flotation of copper, are better than these of middling returning in order. The best closed-circuit test plan, of which results is copper grade20.88%and recovery rate93.82%, meet the requerements in which copper recovery rate break90%.The single mineral test of pure chalcopy and pyrite study mineral flotabiity, the results prove:PLQ own the strong ability of collecting chalcopyrite and most chalcopyrite were floated at pH value from3to12, but the floating quantity of pure pyrite is not so many, especially in the alkaline pulp. When PLQ consumption is low, pyrite flotability is poor. The more PLQ sosage is, the weaker the reagent’s selective ability is and the more the floating quantity of pure pyrite is.The use of infrared testing found out the composition and related functional groups of PLQ to understand the interaction mechanism of PLQ and copper mineral. Through testing the chalcopyrite which was adsorbed before and after by PLQ, the test deduced the interaction mechanism of PLQ and copper mineral:In addition to physical adsorption, conjugation effect of two carboxyl content improve the collecting ability of PLQ.