Heap Bioleaching of Copper-Nickel Ores in the Arctic

This paper describes a mineralogical study that looked at the copper-nickel ores of the Talnakh Ore Cluster. It also describes attempts to develop a method for predicting concentration performance on the basis of mapping data. The geological classification of the Talnakh ores developed in 1987–1992 is rather a classification of natural types and varieties as it fails to specify any particular concentration process indicators. The copper-nickel ores of the Talnakh Ore Cluster are multicomponent and it is quite difficult to develop a classification based on concentration performance that would account for the quality of concentrates and the recovery of non-ferrous and noble metals. In the period of 2015–2020, a series of experiments and a mineralogical study were conducted for 107 samples of impregnated ore, 105 samples of copper ore and 60 samples of high-grade ore under the contracts with the R&D Office of Nornickel’s Polar Division. Based on the results of the experiments, a classification was developed for impregnated, copper and high-grade ores based of one selected actual process indicator. Due to the use of a mining information system, each box of a block model representing an ore body (or, each mining unit with known characteristics) can be assigned appropriate concentration indicators. On the basis of geological mapping results, a method was applied for indirect calculation of expected concentration indicators based on a number of attributes. With the help of this method, the authors were able to determine the actual indicators, estimate the calculation error and find a way to improve the predictability of the model through analyzing additional samples and attributes.

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Talc and serpentine particles morphology effect upon their distribution in flotation products (through the example of the Pechenga copper-nickel ores)

Obogashchenie Rud ◽

10.17580/or.2017.01.07 ◽

2017 ◽

pp. 35-39

Author(s):

S. V. Likhacheva ◽

◽

Yu. N. Neradovskiy ◽

Keyword(s):

Copper Nickel ◽

Nickel Ores ◽

Morphology Effect

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Valuable Metals Recovery from Tailings of Patched Copper—Nickel Ores

Mineral Processing and Extractive Metallurgy Review ◽

10.1080/08827509508936986 ◽

1995 ◽

Vol 15 (1-4) ◽

pp. 261-261

Author(s):

E. K. YAKUBAILIK ◽

V. V. RIBAS ◽

A. G. ZVEGINZEV ◽

V. T. DJACHENKO ◽

L. S. STEPANENKO ◽

...

Keyword(s):

Copper Nickel ◽

Metals Recovery ◽

Valuable Metals ◽

Nickel Ores

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Palladium tellurides and bismuthtellurides in sulfide copper-nickel ores of the Savabeisky ore occurrence (Nenets Autonomous District, Russsia)

LITOSFERA ◽

10.24930/1681-9004-2021-21-4-574-594 ◽

2021 ◽

Vol 21 (4) ◽

pp. 574-594

Author(s):

R. I. Shaybekov ◽

B. A. Makeev ◽

N. N. Kononkova ◽

S. I. Isaenko ◽

E. M. Tropnikov

Keyword(s):

Raman Spectroscopy ◽

Noble Metals ◽

Electron Backscatter Diffraction ◽

Integrated Approach ◽

Analysis Data ◽

X Ray ◽

Copper Nickel ◽

North East ◽

Nickel Ores ◽

First Time

Research subject. The Savabeisky sulfide copper-nickel ore occurrence, located in the central part of the Khengur (Central Pay-Khoy) gabbro-dolerite complex of the Pay-Khoy, within the Yugorsky Peninsula, located in the Far North-East of the European part of Russia, in the Arkhangelsk region, between the Barents and Kara Seas.Materials and methods. Samples of copper-nickel ores with noble metal mineralization were studied. Palladium tellurides and bismuthtellurides were characterized using optical and scanning electron microscopy, electron backscatter diffraction (EBSD), X-ray structural analysis and Raman spectroscopy.Results. Bismuthtellurides in the Paykhoysko-Vaigach-Yuzhnonovozemelskiy region – michenerite, merenskyite and unidentified palladium telluride of the kotulskite–merenskyite series with crystal formula Pd2(TeSbBi)3 – were found for the first time. The unit cell parameter of Pay-Khoy michenerite was calculated using X-ray diffraction analysis data: a = 6.638(2) Å. According to Raman spectroscopy, the palladium tellurides and bismuthtellurides of the Savabeisky ore occurrence were distinguished into 4 groups: Sb-kotulskite (does not contain Raman-active modes), unnamed PGM Pd2(TeSbBi)3 (bands in the range 95–103, 121–126 cm–1, obtained for the first time), Sb-merenskyite (band 126–135 cm–1), michenerite (bands with maxima 100 and 116 cm–1, obtained for the first time). The Kikuchi lines for michenerite and the mineral of the kotulskite–merenskyite series were obtained by the EBSD method.Conclusions. The diagnosis of palladium tellurides and bismuthtellurides is a rather complicated problem (wide variations in compositions, low hardness, small size, thin intergrowths of several individuals, the presence of impurities, etc.) affecting the determination of their mineral form and requiring an integrated approach. The Raman spectra of michenerite and unnamed PGM can be used as standards for the rapid identification of their natural forms, in contrast to EBSD, which requires improved sample preparation. The relatively high content of antimony in the ore minerals and noble metals minerals at the Savabeisky ore occurrence is the antimony metallogenic specificity characteristic of the entire Uralsko-Novozemelskiy province.

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