Identification of imported copper concentrate based on process mineralogy study
HONG Qiuyang1,2,3, LI Bo1,2,3, ZHU Zhixiu4, LIANG Dongyun1,2,3
1. Institute of Resources Utilization and Rare Earth Development,Guangdong Academy of Sciences, Guangzhou 510650, China; 2. State Key Laboratory of Rare Metals Separation and Comprehensive Utilization, Guangzhou 510650, China; 3. Guangdong Provincial Key Laboratory of Development and Comprehensive Utilization of Mineral Resources,Guangzhou 510650, China; 4. Technical Center for Industrial Product and Raw Material Inspection and Testing of Shanghai Customs, Shanghai 200120, China
Abstract：The natural ore, pyrometallurgical slag and hydrometallurgical residue are, essentially, the results of phase transition under certain physical and chemical conditions. The conditions and laws of phase formation led to their own characteristics in terms of phase combination and crystal morphology. The process mineralogy parameters of one copper concentrate imported from Zambia were studied by mineral liberation analyzer (MLA). The results showed that the copper sulfide minerals in the sample mainly included chalcopyrite, bornite, chalcocite and covellite. The copper oxide minerals mainly included cuprite, malachite, pseudomalachite, chrysocolla, brochantite, delafossite, and tenorite. Other copper phases were metallic copper and matte. The iron minerals included magnetite, limonite, and chromite. The gangue minerals included quartz, feldspar, sericite, phlogopite, augite and hornblende. The matte in sample was spherical, the magnetite occurred as euhedral-subhedral crystals, while the olivine occurred as short column. Some chalcocite and bornite grains were intergrown with the glass, hornblende, magnetite, and matte. Based on the petrology, ore genesis and the theories of mineralogy, it was identified that this copper concentrate was mingled with the pyrometallurgical slag of cupper by analyzing its process mineralogy characteristics such as material composition, main phase content and association as well as microscopic morphology.
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