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chalcopyrite,chalcocite,and covellite minerals in the plant feed.The severe alteration to clay minerals was a general rule in all thin sections that were prepared from the plant feed.Sieve analysis... bearing minerals with chalcopyrite and chalcocite is the occurrence mechanism of silicate and aluminosilicate minerals in the flotation concentrate.The dispersed form of interlocking is predominant......
, Institute of Process Engineering, Chinese Academy of Sciences3. Wanbao Mining Limited摘 要:The effects of temperature on chalcocite/pyrite oxidation and the microbial population in the bioleaching columns of a low-grade chalcocite ore were investigated in this study. Raffinate from the industrial bioleaching heap was used as an irrigation solution for columns......
sulfur, jarosite, bornite and chalcocite were found at days 2 and 4; and 2) bornite and chalcocite disappeared, covellite formed, and jarosite gradually became the main component at days 6 and 10. These results indicated that metal-deficiency sulfides chalcocite and bornite were first formed with a low redox potential value (360-461 mV), and then gradually transformed to covellite with a high......
indicated that the conversion of chalcopyrite into bornite took place at about 975K, and the conversion of bornite into chalcocite at 1065-1123K. The thermodynamic calculations also showed......
, the electronic structures of chalcopyrite, chalcocite, covellite and bornite were calculated, and the relationship between electronic structure and flotation property was discussed. Different active... that chalcopyrite is a direct band-gap p-type semiconductor with band gap of 0.99 eV, while chalcocite, covellite and bornite are all conductor. On the basis of frontier orbital theory, the oxidation differences......
promoted the reduction of chalcopyrite to chalcocite(Cu2S), thus accelerating its dissolution.关键词:......
of the flotation processes with two pulp densities of 25 wt% and 30 wt%. The major copper-bearing minerals identified by microscopic analysis of the concentrate samples included chalcopyrite(56.2 wt%), chalcocite......
%, respectively. The main copper-bearing phases are metallic copper and chalcocite, the mass fractions of which are 2.64% and 1.17%, respectively. Additionally, 9.78% of glass phase also exists in the slag. Fayalite is mixed with the magnetite and forms the basement phase. The metallic copper, chalcocite and glass phase are mingled inside the grains of fayalite and magnetite, or coated by them. The surface......
dissolved secondary mineral chalcocite at a low redox potential (<400 mV) and then enhanced the copper dissolution. Jarosite accumulated immediately in the initial stage of bioleaching... (CuFeS2), chalcocite (Cu2S), covellite (CuS), bornite (Cu5FeS4), elemental sulfur (S0) and jarosite (KFe3(SO4)2(OH)6) used in this study were provided by the School of Minerals Processing......
formed in the dissolution of bornite is +1. The bornite and chalcopyrite can be converted into each other, and both can be further converted to covellite and/or chalcocite. Key words: leaching; bornite... and intermediary sulfide formed in the dissolution of bornite is +1. 3) Bornite can be transformed into chalcocite, chalcopyrite, and covellite. There may be two paths for oxidation of chalcopyrite to Cu2+: 1......
