| With continuous exploitation of the mineral resources in recent years, the features "poor-fine-complex-dispersive" of copper-lead-zinc polymetallic sulphide ore are more and more obvious, and the comprehensive utilization of these resources in our country is less than foreign level, so how to achieve effective separation of copper-lead-zinc polymetallic sulphide ore has become the main technical problem of mineral processing industry. From the mine actual resource characteristics, taking intensive course of resource conservation and comprehensive utilization, maximizing comprehensive utilization rate of copper-lead-zinc ore, and strengthening mineral processing technology research of this resource has important theoretical significance and practical application value.This paper takes Qi Baoshan Lead-Zinc ore in Jiangxi province as research object, this ore contains Cu of0.27%, Pb of2.07%and Zn of3.80%, the embedded feature is complex and monomer dissociation degree is bad, so this ore is refractory copper-lead-zinc polymetallic sulphide ore. With the rapid global process of industrialization, the demand of industrial production and civil life for nonferrous metals is increasing, thus stimulating the rapid development of relevant industry and continuous improvement of mineral processing technology in the nonferrous metal mining industry.The laboratory scale test mainly studied "Copper-Lead-Zinc preferential flotation" project, and investigated the effect of two processes of the lead rough concentrate regrinding and without regrinding on copper-lead-zinc flotation indexes.The test results show that the process of "Copper-Lead-Zinc preferential flotation and lead rough concentrate regrinding" can obtain better results than that of lead rough concentrate without regrinding". Copper mineral preferential flotation can be realized in the case of smaller amount of copper high efficient collector LP-01, copper concentrate with Cu grade of19.84%, Cu recovery of60.25%; Pb grade of7.58%, Pb occupation of3.00%; Zn grade of4.34%, Zn occupation of0.94%can be obtained after copper rough concentrate is selected twice. Pb rough flotation takes LP-11as collector and ZnSO4and Na2SO3as depressor of zinc mineral, and Pb concentrate with Cu grade of1.24%, Cu occupation of9.60%; Pb grade of72.34%, Pb recovery of73.04%; Zn grade of5.80%, Zn occupation of3.19%can be obtained by selected four times after Pb mineral fully monomer dissociation by regrinding. Zn rough flotation takes CUSO4as activator and butyl xanthate ascollector, and Zn concentrate with Cu grade of0.55%, Cu occupation of13.55%; Pb grade of1.97%, Pb occupation of6.33%; Zn grade of50.55%, Zn recovery of88.46%can be obtained after selected four times. In addition, the scene demonstration test of "Copper-Lead-Zinc preferential flotation and lead rough concentrate regrinding" was carried out, and the indexes basically reached those of laboratory scale test expect that metals grade is lower than laboratory scale test.Pure mineral test proved the scale test results of practical minerals, by using many kinds of modern mineral testing technology such as Infrared spectroscopy testing and Ultraviolet spectroscopy testing, the action mechanism between reagents and the surface of chalcopyrite, galena and sphalerite and the measurement of adsorption on the mineral surfaces was studied in the two collectors LP-01and LP-11system, and it proved that the changes of adsorption and floatation recovery was the same.Theory analysis combining with the actual technology research fully proved the feasibility and superiority of "Copper-Lead-Zinc preferential flotation and lead rough concentrate regrinding" process. |
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