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Chemical leaching mechanism of chalcopyrite with difference mineralizationJing Bai,Jian-Kang Wen,Song-Tao Huang,Biao WuNational Engineering Laboratory of Biohydrometallury, General Research Institute for Nonferrous Metals摘 要:This paper presents the effect of mineralization on chalcopyrite chemical leaching in very simple H2SO4 solution systems at pH 1.0......
-contact-leaching mechanism; chalcopyrite concentrate; bioleaching; passivation  ... of chalcopyrite as its slow kinetics results in low copper extraction[4]. Many researches have dealt with the subject of the slow kinetics of chalcopyrite leaching and its passivation [5-7]. These studies all......
. The ordinary leaching and strengthening leaching by adding glass beads were carried out. The results show that the passivation of chalcopyrite was greatly weakened in strengthening leaching due... precipitates and weak passivation on the surface of chalcopyrite in strengthening leaching. In contrast, there are thick and compact jarosite precipitate and obvious passivation in ordinary leaching......
Kinetics of chemical leaching of chalcopyrite from low grade copper ore: behavior of different size fractionsH. Naderi1,M. Abdollahy1,N. Mostoufi2,M.J. Koleini1,S.A. Shojaosadati31. Mining..., Faculty of Engineering, Tarbiat Modares University摘 要:The kinetics of the chemical leaching of copper from low grade ore in ferric sulfate media......
Bacterial leaching of chalcopyrite and bornite with native bioleaching microorganism WANG Jun(王 军), QIN Wen-qing(覃文庆), ZHANG Yan-sheng(张雁生), YANG Cong-ren(杨聪仁), ZHANG Jian-wen(张建... compositions of the mineral are listed in Tables 1 and 2. Table 1 Chemical composition of chalcopyrite (mass fraction, %) Table 2 Chemical composition of bornite (mass fraction, %) The X-ray......
of quantitative chemical analysis [M]. 5th edition, London: Great Britain, John Wiley & Sons Inc. 1989. [47] HACKL R P, DREISINGER D B, PETERS E, KING J A. Passivation of chalcopyrite during...; chalcopyrite; oxidation; leaching; dissolution Cite this article as: M. Deniz Turan, Mustafa Boyrazl, H. Soner Altundoan. Improving of copper extraction from chalcopyrite by using NaCl [J]. Journal of Central......
]. Electrochim Acta, 2010, 55(18): 5041-5056. [18] BALLESTER A, CORDOBA E M, MUNOZ J A, BLAZQUEZ M L, GONZALEZ F. Passivation of chalcopyrite during its chemical leaching with ferric ion at 68 degrees C.... The low leaching rate may have a great relationship with passivation layer formed during leaching, which can hinder the bioleaching of chalcopyrite [9-10, 16-20]. In Fig. 8, X-ray diffraction pattern......
bioleaching solution is the passivation. The nature of the passivation films is still unclear, although there are many researches about chalcopyrite leaching. One hypothesis is that a sulfur layer would...-) product [53, 61, 78-83, 92]. In 2019, ZHAO et al [76] summarized the passivation mechanism of chalcopyrite bioleaching. Solution redox potential plays a key role in the leaching of chalcopyrite [35......
; (3) In addition to the bioleaching progress, chalcopyrite may be oxidized as Eq.(4) in sulphuric acid solution, where the sulfur formed by chemical leaching is also oxidized by Eq.(3... in the passivation of chalcopyrite during bioleaching [J]. Minerals Engineering, 2000, 13: 1117-1127. [22] KIRSTEN K. Microbial cycling of iron and sulfur in acidic coal mining lake sediments [J]. Water Air......
inhibition of chalcopyrite. Quantum chemical calculations show that the adsorption of the tested compounds on the chalcopyrite surface is energetically favorable and so, it can explain the inhibiting effects that were observed. Key words: chalcopyrite oxidation; phenacyl derivatives; inhibition; potentiodynamic polarization; quantum chemical calculation 1 Introduction Chalcopyrite (CuFeS2) is the most......