Cations stress on low-grade nickel sulfide ore oxidation leaching

Abstract

The effects of cations stress of magnesium ion and sodium ion on the low-grade nickel sulfide ore oxidative leaching in simulated sulfuric acid solutions were investigated. This study was performed in two courses, including the effect of the cations on the valuable metals leaching efficiencies of the nickel ore and its influences on the electrochemical oxidation behavior of the nickel ore. The leaching results present that parts of magnesium-containing gangues and ferrous sulfide are preferentially dissolved into lixivium, and the leaching efficiencies of Ni and Cu decreased much related to the leached concentrations of Mg²⁺ increased. The results of electrochemical measurements show that the oxidation leaching of the low-grade nickel sulfide ore is controlled by the intermediates oxidative diffusion. Mg²⁺, as well as Na⁺, affects the transformations of the Fe³⁺/Fe²⁺ couple and sulfur-containing species, and those cations are apt to be attracted by the anions and directionally adhere to the negative active site of the metal sulfide surface, causing an increase in the electrochemical activities, which facilitates the electron transfer between the ore and leaching mediums. By comparative study of the role of Mg²⁺ and Na⁺, it is found that Mg²⁺ negatively affects the oxidative diffusion of the intermediates through promoting the generation of a compact film, which lowers the metals leached efficiencies, and the unfavorable effect of Na⁺ tends to be the coupled effect of the leached Mg²⁺ and Fe³⁺.

Keywords

magnesium ion / sodium ion / intermediates diffusion / directional adsorption / passivation film

References

[1] KERFOOT D G E. Nickel [M]//Ullmann’s Encyclopedia of Industrial Chemistry. 2000. DOI: https://doi.org/10.1002/14356007.a17_157.

[2] DaiT-g, PanJ-q, ZhangD-xian. The 70-year progress of non-ferrous metal exploration in China [J]. The Chinese Journal of Nonferrous Metals, 2019, 29(9): 1817-1827(in Chinese)

[3] TangZ-l, RenD-jin. Types and metallogenic models of nickel sulfide deposits of China [J]. Acta Geologica Sinica, 1988, 1(2): 193-206

[4] SunT, WangD-h, QianZ-z, FuY, ChenZ-h, LouD-bo. Summary of metallogenic regularity for the nickel deposits, China [J]. Acta Geologica Sinica, 2014, 88(12): 2227-2251(in Chinese)

[5] EksteenJ J, OrabyE A, NguyenV. Leaching and ion exchange based recovery of nickel and cobalt from a low grade, serpentine-rich sulfide ore using an alkaline glycine lixiviant system [J]. Minerals Engineering, 2020, 145: 106073

[6] CuiF-h, MuW-n, ZhaiY-c, GouX-yi. The selective chlorination of nickel and copper from low-grade nickel-copper sulfide-oxide ore: Mechanism and kinetics [J]. Separation and Purification Technology, 2020, 239116577

[7] SunJ-z, ChenB-w, WenJ-k, WangD-zuo. Application and research progresses of hydrometallurgy technology for nickel ore [J]. The Chinese Journal of Nonferrous Metals, 2018, 28(2): 356-364 in Chinese)

[8] LI Guang-shi, CHENG Hong-wei, XU Cong, LU Chang-yuan, LU Xiong-gang, ZOU Xing-li, XU Qian. Mineralogical analysis of nickel/copper polymetallic sulfide ore by X-ray diffraction using Rietveld method [C]//TMS 2016 Annual Meeting & Exhibition, Characterization of Minerals, Metals, and Materials 2016. Springer International Publishing, 2016. DOI: https://doi.org/10.1007/978-3-319-48210-1_8.

[9] PorterT M. Regional tectonics, geology, magma chamber processes and mineralisation of the Jinchuan nickel- copper-PGE deposit, Gansu province, China: A review [J]. Geosience Frontiers, 2016, 7(3): 431-451

[10] RaoG V. Nickel and cobalt ores: Flotation [M]. Encyclopedia of Separation Science, 2000, Amsterdam, Elsevier, 3491-3500

[11] BarskiiL A, RybasvV, FatY M A, PonomarevG P. Influence of sulfur-containing ions on selective flotation of copper-nickel ores [J]. Soviet Mining, 1986, 22(4): 310-316

[12] YuD-w, UtigardT A, BaratiM. Fluidized bed selective oxidation-sulfation roasting of nickel sulfide concentrate: Part II. Oxidation roasting [J]. Metallurgical and Materials Transactions B, 2014, 45(2): 653-661

[13] HuangK-g, ChenW-x, PengX-g, ZengX-xi. A flotation technique for low-grade nickel ore [J]. The Chinese Journal of Nonferrous Metals, 1999, 9(3): 601-605(in Chinese)

[14] ImideevV A, AleksandrovP V, MedvedevA S, BazhenovaO V, KhanapievaA R. Nickel sulfide concentrate processing using low-temperature roasting with sodium chloride [J]. Metallurgist, 2014, 58(56): 353-359

[15] HarrisC T, PeaceyJ G, PicklescA. Selective sulphidation and flotation of nickel from a nickeliferous laterite ore [J]. Minerals Engineering, 2013, 54: 21-31

[16] WatlingH R. The bioleaching of nickel-copper sulfides [J]. Hydrometallurgy, 2008, 91(1–4): 70-88

[17] DysonN F, ScottT R. Acid leaching of nickel sulphide concentrates [J]. Hydrometallurgy, 1976, 1(4): 361-372

[18] BrynerL C, JamesonA K. Microorganisms in leaching sulfide minerals [J]. Applied Microbiology, 1958, 6(4): 281-287

[19] ZhenS-j, QinW-q, YanZ-q, ZhangY-s, WangJ, RenL-yi. Bioleaching of low grade nickel sulfide mineral in column reactor [J]. Transactions of Nonferrous Metals Society of China, 2008, 18(6): 1480-1484

[20] SunJ-z, WenJ-k, ChenB-w, WuBiao. Mechanism of Mg²⁺ dissolution from olivine and serpentine: Implication for bioleaching of high-magnesium nickel sulfide ore at elevated pH [J]. International Journal of Minerals Metallurgy and Materials, 2019, 26(9): 1069-1079

[21] KangJ-x, FengY-l, LiH-r, DuZ-w, DengX-y, WangH-jun. New understanding of the reduction mechanism of pyrolusite in the Acidithiobacillus ferrooxidans bio-leaching system [J]. Electrochimica Acta, 2019, 297: 443-451

[22] SunC, ChenX-a, ChangX-a, XiaoW-q, WangS-h, ChenY-jun. Study on acid leaching conditions of Ni from tailings [J]. Inorganic Chemicals Industry, 2013, 45(8): 49-5154

[23] DoradoA D, SoleM, LaoC, AlfonsoP, GamisansX. Effect of pH and Fe(III) ions on chalcopyrite bioleaching by an adapted consortium from biogas sweetening [J]. Minerals Engineering, 2012, 39: 36-38

[24] BredenhannR, VuurenC P J V. The leaching behavior of a nickel concentrate in an oxidative sulfuric acid solution [J]. Minerals Engineering, 1999, 12(6): 687-692

[25] LiH-x, LiC, ZhangZ-qian. Decomposition mechanism of pentlandite during electrochemical bio-oxidation process [J]. Transactions of Nonferrous Metals Society of China, 2012, 22(3): 731-739

[26] AhmadiA, SchaffieM, PetersenJ, SchippersA, RanjbarM. Conventional and electrochemical bioleaching of chalcopyrite concentrates by moderately thermophilic bacteria at high pulp density [J]. Hydrometallurgy, 2011, 106(12): 84-92

[27] AlmeidaC M V B, GiannettiB F. The electrochemical behavior of pyrite-pyrrhotite mixtures [J]. Journal of Electroanalytical Chemistry, 2003, 553: 27-34

[28] MarapeG, VemaakM K G. Fundamentals of pentlandite mineralogy and its effect on its electrochemical behavior [J]. Minerals Engineering, 2012, 32: 60-67

[29] LiY, KawashimaN, LiJ, ChandraA P, GersonA R. A review of the structure, and fundamental mechanisms and kinetics of the leaching of chalcopyrite [J]. Advances in Colloid & Interface Science, 2013, 197–198: 1-32

[30] KarimiS, GhahremanA, RashchiF. Kinetics of Fe(III)-Fe(II) redox half-reactions on sphalerite surface [J]. Electrochimica Acta, 2018, 281: 624-637

[31] YangC-r, JiaoF, QinW-qing. Leaching of chalcopyrite: An emphasis on effect of copper and iron ions [J]. Journal of Central South University, 2018, 25(10): 2380-2386

[32] TamuraH, KawamuraS, HagayamaM. Acceleration of the oxidation of Fe²⁺ ions by Fe(III)-oxyhydroxides [J]. Corrosion Science, 1980, 20(89): 963-971