Interface Characteristics of Lead and Copper Minerals from Ultra-fine Cyanide Tailings

doi:10.12068/j.issn.1005-3026.2019.01.012

Abstract

Abstract: The copper-lead separation of cyanide tailings from Shandong Province is hardly possible in the process of flotation. XRD， laser partide size analyzer， flotation experiment， FTIR， SEM-EDS and microscope are used to investigate the interface characteristics of lead and copper minerals. The results show that the main minerals in the cyanide tailings are galena， chalcopyrite， pyrite and sphalerite. The mineral particles smaller than 38μm account for 95.61%. The surface of chalcopyrite and galena in the cyanide tailings contains plenty of oil component and it is proved to be lubricating oil. Chalcopyrite is covered with lubricating oil and isn’t inhibited by cyanide. Ultra-fine galena particles are wrapped on the surface of chalcopyrite by hydrophobic force， and this makes the lead and copper unable to be separated.

Key words: cyanide tailing, fine particle flotation, copper-lead separation, carrier, interface characteristics

CLC Number:

TD91

QIU Xue-min， YANG Hong-ying， CHEN Guo-bao， ZHAO Su-xing. Interface Characteristics of Lead and Copper Minerals from Ultra-fine Cyanide Tailings[J]. Journal of Northeastern University Natural Science, 2019, 40(1): 58-62.

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