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Artykuły w czasopismach na temat „Nickel-sulphide”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 31 lipca 2024

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1

Harris, C. T., C. A. Pickles i J. G. Peacey. "A Thermodynamic Analysis of the Selective Sulphidation of Nickel from a Nickeliferous Lateritic Ore". High Temperature Materials and Processes 31, nr 4-5 (30.10.2012): 603–11. http://dx.doi.org/10.1515/htmp-2012-0098.

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AbstractThe production of a nickel sulphide concentrate through selective sulphidation of a nickeliferous lateritic ore at temperatures lower than current smelting temperatures, is being studied as a potential production method for upgrading lateritic ores. The ability to produce such a nickel sulphide concentrate at economically attractive grades, while achieving reasonable nickel recoveries, relies on the conversion of the maximum amount of nickel oxide to sulphide, while minimizing the amount of iron sulphide. This paper examines the thermodynamic basis for this selective sulphidation. The analysis includes both pure component equilibrium as well as various solid and liquid solution phases, which are anticipated to set limits on the maximum achievable grade/recovery combinations. Thermodynamic calculations show that, for high iron limonitic ores, grades of up to 20 to 25 mass percent nickel should be possible, while maintaining recoveries of greater than 80 percent.

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2

Bielecki, S., Manuela Reben i Jan Wasylak. "Nickel Sulphide Inclusions in Tempered Glass". Advanced Materials Research 39-40 (kwiecień 2008): 563–66. http://dx.doi.org/10.4028/www.scientific.net/amr.39-40.563.

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The goal of the work was to determine and characterize the inclusions of nickel sulphide in tempered glass. During the tempering process where the glass is heated the nickel sulphide stones are completed transformed to the high temperature modification which is unstable when the temperature decreased. The glass samples, which include the NiS stones, were investigated by microscopic method (SEM) and characterized by EDAX analysis. The glass samples were analysis by elastooptic studies but it did not prove occurrence of stresses. Obtained results will help to solve the problem with forming nickel sulphide inclusions.

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3

Smoła, G., A. Poczekajło i Z. Grzesik. "Reduction Kinetics Of NiS Sulphide". Archives of Metallurgy and Materials 60, nr 2 (1.06.2015): 981–83. http://dx.doi.org/10.1515/amm-2015-0245.

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Abstract Reduction mechanism and kinetics of NiS nickel sulphide obtained during the process of nickel sulphidation, have been studied as a function of temperature (723-873 K). It has been found that the reduction process follows linear kinetics with activation energy of 103 kJ/mol. It is important to note that during nickel sulphidation and after the reduction of nickel sulphide, the product sample shows highly developed surface, creating thus the potential possibilities to be applied in heterogeneous catalysis.

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4

Afolabi, Ayo Samuel, Ambali Saka Abdulkareem i Edison Muzenda. "Effect of Flotation Parameters on Recovery of South Africa Nickel Sulphide Ore". Applied Mechanics and Materials 260-261 (grudzień 2012): 961–68. http://dx.doi.org/10.4028/www.scientific.net/amm.260-261.961.

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This study investigated the effects of flotation parameters on the recovery of low grade nickel sulphide ore. The parameters investigated are the particle size, flotation time, temperature and pH of the pulp. The analyses of the results obtained showed that particle size, pH, and flotation time had significant effects on the recovery of nickel sulphide ore. The particle size distribution showed that the breakage rate increased in coarse particles and decreased with reduction in particle size. The optimum particle size was found to be 87% passing 75 µm with the highest nickel recovery of 35% at 15 minutes while 68, 79, and 97% passing 75 µm produced nickel recovery of 15, 20 and 16% respectively. The maximum nickel recovery of 35% was achieved at pH of 10.5 which indicated that the nickel sulphide ore has good floatability at alkaline pH range. It was also observed that the recovery of nickel increased with flotation time and the highest recovery was obtained at flotation time of 15 minutes.

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5

Eddy, Basil T., Belinda L. Stuckenberg i Gemot Pansi. "X-ray Fluorescence and Fire-Assay Collection: Useful Partners in the Determination of the Platinum-Group Elements". Advances in X-ray Analysis 34 (1990): 277–83. http://dx.doi.org/10.1154/s0376030800014567.

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AbstractThis paper describes the determination of the individual platinum-group elements by X-ray fluorescence after nickel-sulphide fire-assay collection. The platinum-group sulphide residue obtained after the dissolution of the nickel is dissolved in acid, and reduced to the metal by use of sodium borohydride. The finely divided metals are then filtered onto a millipore filter, and measured by X-ray fluorescence spectroscopy. The procedure makes use of gold as an internal standard. Factors affecting the accuracy and precision are investigated.

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6

Bogatyrev, D. M., G. V. Petrov i L. B. Tsymbulov. "Distribution of noble metals between slag and matte phases during smelting of copper-sulphide and copper-nickel concentrates". iPolytech Journal 26, nr 1 (5.04.2022): 128–41. http://dx.doi.org/10.21285/1814-3520-2022-1-128-141.

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In this work, we analyse and structure the information on the distribution of noble metals during pyrometallurgical processing of copper-sulphide and copper-nickel concentrates, available in domestic and foreign scientific sources. The data on the influence of oxygen partial pressure in the system and, consequently, the matte composition, process temperature, and the phase composition of slag on the distribution of platinum group metals, gold, and silver between the smelting products were analysed. Broad-ranging information on the distribution of the examined metals between matte and slag in the processing of copper-sulphide and copper-nickel concentrates was studied. It was established that the distribution of noble metals between the products of smelting using modern analytical methods is still in its early stages. Contradictory information on the behaviour of gold, silver, and platinum group metals during the pyrometallurgical processing of copper-sulphide and copper-nickel concentrates is presented in literature due to the variations in the experimental procedures, preparation, and analysis of test samples, and, as a result, further interpretation of the obtained results. Furthermore, no data on the influence of such technological parameters as magnetite content in the slag phase, the relationship between copper and nickel in the initial furnace charge and obtained mattes on the distribution of gold, silver, and platinum group metals between the products of smelting are available. In addition, no information on the distribution of noble metals during the pyrometallurgical slags depletion obtained in oxidative smelting of copper-nickel production has been published. Thus, it was decided to perform further research on establishing optimal technological conditions for oxidising smelting of copper-sulphide and copper-nickel concentrates, as well as pyrometallurgical depletion of slags, allowing for the highest extraction rates of noble metals into the target product.

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7

Himstedt, Rasmus, Dominik Hinrichs, Joachim Sann, Anica Weller, Georg Steinhauser i Dirk Dorfs. "Halide ion influence on the formation of nickel nanoparticles and their conversion into hollow nickel phosphide and sulphide nanocrystals". Nanoscale 11, nr 32 (2019): 15104–11. http://dx.doi.org/10.1039/c9nr04187g.

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8

Elliott, R., i C. A. Pickles. "Thermodynamic Analysis of the Selective Reduction of a Nickeliferous Limonitic Laterite Ore by Hydrogen". High Temperature Materials and Processes 36, nr 8 (26.09.2017): 835–46. http://dx.doi.org/10.1515/htmp-2015-0208.

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AbstractNickeliferous limonitic laterite ores are becoming increasingly attractive as a source of metallic nickel as the costs associated with recovering nickel from the sulphide ores increase. Unlike the sulphide ores, however, the laterite ores are not amenable to concentration by conventional mineral processing techniques such as froth flotation. One potential concentrating method would be the pyrometallurgical solid state reduction of the nickeliferous limonitic ores at relatively low temperatures, followed by beneficiation via magnetic separation. A number of reductants can be utilized in the reduction step, and in this research, a thermodynamic model has been developed to investigate the reduction of a nickeliferous limonitic laterite by hydrogen. The nickel recovery to the ferronickel phase was predicted to be greater than 95 % at temperatures of 673–873 K. Reductant additions above the stoichiometric requirement resulted in high recoveries over a wider temperature range, but the nickel grade of the ferronickel decreased.

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9

Kungurova, V. Ye, Yu P. Trukhin i V. A. Stepanov. "Sulphide copper-nickel ore occurrence Olenie (Kamchatka)". Mining Informational and analytical bulletin 12, nr 57 (2018): 122–33. http://dx.doi.org/10.25018/0236-1493-2018-12-57-122-133.

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10

Smits, R. G., B. F. Schaefer i S. W. Beresford. "Geochemical characteristics of orogenic nickel sulphide deposits". Geochimica et Cosmochimica Acta 70, nr 18 (sierpień 2006): A600. http://dx.doi.org/10.1016/j.gca.2006.06.1115.

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11

Dharmaprakash, S. M. "Synthesis and Electrical Conductivity of Nickel Sulphide". Crystal Research and Technology 31, nr 5 (1996): K49—K53. http://dx.doi.org/10.1002/crat.2170310528.

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12

Roberts, D. E., i G. A. Travis. "Microtextural evaluation of nickel sulphide gossans in Western Australia". Transactions of the Royal Society of Edinburgh: Earth Sciences 77, nr 1 (1986): 81–98. http://dx.doi.org/10.1017/s0263593300010749.

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ABSTRACTThe discovery in 1966 of Ni sulphide deposits at Kambalda, Western Australia resulted from the interpretation of siliceous limonitic material containing up to 1·0% Ni and 0·3% Cu as the gossanous expression of Ni sulphides. In many cases analysis for Ni, Cu, Zn, Co, Cr, Mn and Pb will distinguish Ni–Cu gossans from other oxidised sulphide assemblages and pseudo-gossans. However, most geochemical classification schemes cannot always distinguish strongly silicified or sulphide-poor Ni gossans from Fe sulphide gossans enriched in Ni and Cu or from some nickeliferous oxidised and lateritic products which have no sulphide source. Ambiguous cases may be resolved by analysis for Pd and Ir but this method is expensive and requires very sophisticated analytical techniques.The use of reflected light microscopy to examine microtextures preserved in the surface gossans from a supergene pyrite-violarite-marcasite sulphide assemblage has allowed the refinement of geochemical classification schemes. The preservation of supergene zone textures by pseudomorphous Si–Fe replacement often permits the original sulphide proportions and Ni–Cu grade to be reliably assessed. Relict microtextures are usually preserved, even in pale coloured, highly siliceous gossans containing less than 0·01% Ni.

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13

Patil, Umakant M., Pranav K. Katkar, Supriya J. Marje, Chandrakant D. Lokhande i Seong C. Jun. "Hydrous nickel sulphide nanoparticle decorated 3D graphene foam electrodes for enhanced supercapacitive performance of an asymmetric device". New Journal of Chemistry 42, nr 24 (2018): 20123–30. http://dx.doi.org/10.1039/c8nj04228d.

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14

Rani, Pinki, Ashwini P. Alegaonkar i Prashant S. Alegaonkar. "Evaluation of Electrochemical Performance of Cobalt Sulphide on Various Current Collectors". Material Science Research India 19, nr 3 (30.12.2022): 134–41. http://dx.doi.org/10.13005/msri/190304.

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In the present study, cobalt sulphide was successfully synthesised via a simple, one-step hydrothermal route. The material has been characterised via infrared (FTIR) spectroscopy, electron microscopy (FESEM), and X-ray diffraction (XRD). The FTIR spectrum reveals a peak at 1126 cm-1, which corresponds to the S-O bending mode, and a peak at 663 cm-1, which represents sulphide stretching. According to XRD analysis, cobalt sulphide formed with the CoS1.097 configuration. FESEM study reveals that cobalt sulphide hexagonal sheets with a thickness of less than 100 nm have been prepared that are further arranged in a floral pattern. Cobalt and sulphide concentrations were found to be proportional in EDX analyses. Further, Electrochemical testing was performed with a two-electrode setup, 6M KOH as the electrolyte, and various current collectors (including nickel foam and aluminium foil). The galvanostatic charge-discharge characteristics and capacitance values have been compared using impedance spectroscopy and other techniques. Details of the analysis are presented.

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15

Kumar, Neeraj, Hemant Mittal, Vyom Parashar, Suprakas Sinha Ray i Jane Catherine Ngila. "Efficient removal of rhodamine 6G dye from aqueous solution using nickel sulphide incorporated polyacrylamide grafted gum karaya bionanocomposite hydrogel". RSC Advances 6, nr 26 (2016): 21929–39. http://dx.doi.org/10.1039/c5ra24299a.

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This research paper reports the synthesis and usage of the polyacrylamide (PAAm) grafted gum karaya (Gk) and nickel sulphide nanoparticle based hydrogel to effectively remove rhodamine 6G dye (R6G) from aqueous solution.

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16

Moskalyk, R. R., i A. M. Alfantazi. "Nickel sulphide smelting and electrorefining practice: A review". Mineral Processing and Extractive Metallurgy Review 23, nr 3-4 (styczeń 2002): 141–80. http://dx.doi.org/10.1080/08827500306893.

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17

Greenhalgh, Stewart, Bing Zhou i Shunhua Cao. "A crosswell seismic experiment for nickel sulphide exploration". Journal of Applied Geophysics 53, nr 2-3 (sierpień 2003): 77–89. http://dx.doi.org/10.1016/s0926-9851(03)00029-6.

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18

Sonai Muthu, Nandhini, i Muralidharan Gopalan. "Mesoporous nickel sulphide nanostructures for enhanced supercapacitor performance". Applied Surface Science 480 (czerwiec 2019): 186–98. http://dx.doi.org/10.1016/j.apsusc.2019.02.250.

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19

Yousfi, Oussama, Patricia Donnadieu, Yves Bréchet, Florence Robaut, Frédéric Charlot, Andreas Kasper i Francis Serruys. "Phase transformations in nickel sulphide: Microstructures and mechanisms". Acta Materialia 58, nr 9 (maj 2010): 3367–80. http://dx.doi.org/10.1016/j.actamat.2010.02.011.

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20

Nath, Anish R., i N. Sandhyarani. "SILAR deposited nickel sulphide-nickel hydroxide nanocomposite for high performance asymmetric supercapacitor". Electrochimica Acta 356 (październik 2020): 136844. http://dx.doi.org/10.1016/j.electacta.2020.136844.

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21

JOTHIRAMALINGAM, R., H. A. AL-LOHEDAN, D. M. AL-DHAYAN i M. D. WASMIAH. "PREPARATION AND STRUCTURAL CHARACTERIZATION OF MoS2 NANOPARTICLE COATED GRAPHENE OXIDE/MANGANESE OXIDE COMPOSITE FOR ENERGY STORAGE APPLICATION". Chalcogenide Letters 17, nr 4 (kwiecień 2020): 217–22. http://dx.doi.org/10.15251/cl.2020.174.217.

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Nanoparticles of powder molybdenum sulphide (MoS2) are deposited on reduced graphene oxide-mesoporous manganese oxide nanocomposite which is represented as MoSGMn were prepared by feasible ultrasonic assisted deposition technique. The above prepared nanocomposite is further coated on Nickel foam substrate for direct application towards supercapacitor electrode fabrication. The detailed studies of thermal property and surface property such as thermal stability, surface structure and zeta potential measurements have been explained for all prepared nanocomposite samples. The thermal stability of as prepared sample stable upto 350 oC in oxygen atmosphere and negative zeta potential obtained for all prepared nanocomposite sample. The different amount of MoS2 nanoparticle (10mg -100 mg range) was utilized to study the effect of molybdenum sulphide addition on major mesoporous manganese oxide matrix. Increased quantity of MoS2 addition increase the electrochemical supercapacitance value of the nanocomposite coated nickel foam modified electrode.

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22

Gericke, Mariekie, i Stefan Robertson. "Treatment of a Nickel-Copper Sulphide Concentrate Using Bioleaching". Advanced Materials Research 825 (październik 2013): 464–67. http://dx.doi.org/10.4028/www.scientific.net/amr.825.464.

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This paper describes bioleach test work performed in continuously operated bench-scale reactor systems on a nickel-copper containing sulphide concentrate at 45 and 70°C, respectively. Optimisation of the process focused on determining the effects of process parameters such as residence time, grind size and feed solids concentration on the leach kinetics, metal extractions and performance of both the moderate thermophile and thermophile cultures. The results showed that nickel recoveries in excess of 96% could be achieved using a moderate grind size and leach temperatures, whereas ultrafine grinding and higher operating temperatures were required to achieve Cu extractions in excess of 93%.

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23

Mujahid, Adnan, Tuba Choudhary, Madiha Mehmood, Muhammd Irshad, Tajamal Hussain, Sadia Zafar Bajwa i Mirza Nadeem Ahmad. "Nickel Sulfide Nanoparticles Incorporated Poly(methyl methacrylate)-Zirconia Membranes for Ultra Deep Desulfurization of Dibenzothiophene". MRS Advances 4, nr 07 (20.11.2018): 369–75. http://dx.doi.org/10.1557/adv.2018.616.

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AbstractUltra deep desulfurization of liquid fuels such as gasoline/diesel has attracted considerable attention of modern clean fuel research due to strict environmental regulations. Apart from that, SOx produced during combustion, poison the catalytic converter and exhaust emission system. Comparing to conventional catalytic and hydrodesulfurization techniques, adsorptive method for removal of sulfur bearing compounds e.g. thiophene derivatives is a promising approach which does not require hydrogen gas and high temperature. In this study, we used nickel sulfide nanoparticles incorporated poly(methyl methacrylate)-zirconia membranes as potential affinity material for adsorptive extraction of dibenzothiophene from n-hexane. The functionality and surface morphology of synthesized material was examined by Fourier transformation infrared (FTIR) spectroscopy and atomic force microscopy (AFM) images, respectively. The quantitative data regarding adsorptive removal of dibenzothiophene was determined by monitoring the shift in absorbance values of standard solutions before and after treating with synthesized material under ambient conditions. Nickel sulphide nanoparticles exhibited suitable rebinding response for removal of dibenzothiophene down to 1 ppm due to affinity interactions which is useful concerning ultra deep desulfurization. Finally, nickel sulphide nanoparticles were incorporated in poly(methyl methacrylate)-zirconia membrane which showed potential application for adsorptive desulfurization of dibenzothiophene at ambient conditions.

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24

Mutton, Andre J., i Peter K. Williams. "NICKEL: Geophysical response of the Rocky's Reward nickel sulphide deposit, Leinster, Western Australia". ASEG Extended Abstracts 1994, nr 1 (grudzień 1994): 181–96. http://dx.doi.org/10.1071/asegspec07_11.

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Khainasova, T. S. "Bioleaching of chalcopyrite from sulphide copper-nickel ore (review)". Mining informational and analytical bulletin, S46 (2020): 247–64. http://dx.doi.org/10.25018/0236-1493-2020-12-46-247-264.

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Khainasova, T. S. "Bioleaching of pentlandite from sulphide copper-nickel ores (review)". Mining informational and analytical bulletin, S46 (2020): 276–87. http://dx.doi.org/10.25018/0236-1493-2020-12-46-276-287.

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Khainasova, T. S. "Bioleaching of pyrrotine from sulphide copper-nickel ores (review)". Mining informational and analytical bulletin, S46 (2020): 225–38. http://dx.doi.org/10.25018/0236-1493-2020-12-46-225-238.

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Wolfgram, Peter, i Howard Golden. "Airborne EM Applied to Sulphide Nickel - Examples and Analysis". ASEG Extended Abstracts 2001, nr 1 (grudzień 2001): 1–4. http://dx.doi.org/10.1071/aseg2001ab149.

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Wolfgram, Peter, i Howard Golden. "Airborne EM Applied to Sulphide Nickel - Examples and Analysis". Exploration Geophysics 32, nr 3-4 (wrzesień 2001): 136–40. http://dx.doi.org/10.1071/eg01136.

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Cheng, Xiaoliang, Houyi Ma, Shenhao Chen, Xiao Chen i Zhiming Yao. "Corrosion of nickel in acid solutions with hydrogen sulphide". Corrosion Science 42, nr 2 (luty 2000): 299–311. http://dx.doi.org/10.1016/s0010-938x(99)00092-x.

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Duchet, J. C., M. J. Tilliette, D. Cornet, L. Vivier, G. Perot, L. Bekakra, C. Moreau i G. Szabo. "Catalytic properties of nickel molybdenum sulphide supported on zirconia". Catalysis Today 10, nr 4 (listopad 1991): 579–92. http://dx.doi.org/10.1016/0920-5861(91)80040-g.

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Barry, John C. "A study of nickel sulphide stones in tempered glass". Ultramicroscopy 52, nr 3-4 (grudzień 1993): 297–305. http://dx.doi.org/10.1016/0304-3991(93)90039-z.

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Li, Jian, Robbie G. McDonald, Anna H. Kaksonen, Christina Morris, Suzy Rea, Kayley M. Usher, Jason Wylie, Felipe Hilario i Chris A. du Plessis. "Applications of Rietveld-based QXRD analysis in mineral processing". Powder Diffraction 29, S1 (17.11.2014): S89—S95. http://dx.doi.org/10.1017/s0885715614001134.

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Rietveld-based quantitative X-ray diffraction (QXRD) has been extensively used for mineralogical characterization in order to understand the reaction chemistry, and kinetics of minerals leaching and formation. This work presents examples where QXRD has been applied to understanding fundamental aspects of these two processes. Firstly, the co-processing of nickel laterites and sulphidic materials has the potential to offer several advantages that include the use of lower grade (including non-smeltable) concentrates, improvement in the rheological behaviour of the blends, and reduction in the use of sulphuric acid. The leaching kinetics and chemistry of mixed nickel laterite ore and sulphide concentrate were explored by the QXRD analysis of feed materials and, intermediates and final leach residues produced using controlled oxidation rates. Under high temperature (250 °C) and pressure oxidation (~40 to 45 atm.) conditions, sulphide minerals in the nickel concentrate underwent several oxidative hydrothermal transformations, and ferrous iron was oxidized and precipitated primarily as hematite. High recovery of nickel can be achieved with low acid consumption under these conditions. Secondly, iron precipitation/removal is an important down-stream process in hydrometallurgy. Moderate concentrations of ferrous iron can be oxidized using micro-organisms with oxidation rates several orders of magnitude faster compared with abiotic oxidation at ambient temperature and pressure. QXRD and chemical analysis have indicated that after oxidation, iron at pH ~2 mostly precipitates as jarosite with various amounts of K+, Na+, NH4+, and H3O+ incorporated into the structure. Bio-catalysed iron removal can be achieved with minimum copper and nickel losses at relatively low pH conditions.

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Zhao, Li Bing, i Yue Xin Han. "Study on Size Distribution of the Copper and Nickel Ore". Advanced Materials Research 92 (styczeń 2010): 221–27. http://dx.doi.org/10.4028/www.scientific.net/amr.92.221.

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Mineralogy research of the copper and nickel ore from Jinchuan is completed in detail that shows the mineral compositions and their percentage and particle size distributions of the valuable minerals. The main valuable minerals are pyrite, violarite, chalcopyrite which are closely associated with other sulphide minerals. These results provide an important basis for the beneficiation tests.

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Mazurenko, R. V., S. L. Prokopenko, G. M. Gunja, L. P. Storozhuk, S. M. Makhno i P. P. Gorbyk. "Electrical and Magnetic Properties of Polymeric Nanocomposites Based on Nickel Ferrites Modified by Copper Sulphide". METALLOFIZIKA I NOVEISHIE TEKHNOLOGII 44, nr 9 (13.12.2022): 1179–93. http://dx.doi.org/10.15407/mfint.44.09.1179.

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Wilton, Derek H. C., Gary M. Thompson i Dawn Evans-Lamswood. "MLA-SEM Characterization of Sulphide Weathering, Erosion, and Transport at the Voisey’s Bay Orthomagmatic Ni-Cu-Co Sulphide Mineralization, Labrador, Canada". Minerals 11, nr 11 (4.11.2021): 1224. http://dx.doi.org/10.3390/min11111224.

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The Voisey’s Bay nickel-copper-cobalt (Ni-Cu-Co) sulphide deposits constitute a significant resource of orthomagmatic mineralization. The deposits are not exposed at the surface except for in a small ferruginous gossan (Discovery Hill). The subsequent geophysical surveys and diamond drilling led to the discovery of the Ovoid ore body, buried beneath 20 m of till, and other deeper deposits in the bedrock. This study was initiated to characterize the sulphide mineralogy of these deposits through various stages of weathering, erosion, and transport. Because the samples ranged from bedrock through to a variety of surficial sediment types, the automated SEM-based identification provided by the MLA-SEM system was the ideal technique to quantitatively evaluate mineral distributions in the different media. The derived MLA-SEM data indicate that, aside from the Discovery Hill gossan, the surface sulphide mineralization at Voisey’s Bay was weathered in a pre-glaciation regolith at the Mini-Ovoid deposit and, on the surface of the Ovoid deposit, the massive sulphide was unoxidized due to a thin calcite-cemented clay cover. Pentlandite is very preferentially oxidized compared to other sulphides in the Voisey’s Bay ore, to depths of up to 10 m in bedrock. Conversely, within the coarse reject samples of crushed drill cores stored in sealed plastic bags, pyrrhotite was altered, whereas pentlandite and chalcopyrite are stable, presumably due to anaerobic reactions. The MLA-SEM detected trace amounts of minute sulphide grains in surficial sediments, but their contents abruptly decreased with distance from the sulphide mineralization. Microtextures such as troilite and pentlandite exsolution or twinning in pyrrhotite, however, could be observed in the fine sulphide grains from till, suggesting a derivation from orthomagmatic sulphide material, such as the Voisey’s Bay mineralization.

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Miroshnikova, L. K., A. Yu Mezentsev, N. V. Semenyakina i E. M. Kotel'nikova. "Geological and geochemical signs and criteria of potential mineralization in the Tangaralakh intrusion". Mining informational and analytical bulletin, nr 6 (20.05.2020): 115–30. http://dx.doi.org/10.25018/0236-1493-2020-6-0-115-130.

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The scope of the discussion embraces the problems connected with development and improvement of geological information processing methods and systems, as well as modeling of primary mineral deposits in exploration of side rock mass and deep horizons of the deposits under mining and in new areas with intent to discover potential copper-nickel sulphide mineralization. The target of the research is the geological and geochemical preconditions and signs of sulphide mineralization in the potentially ore-bearing Tangaralakh field adjacent to the deposits of the Talnakh ore-magmatic system. The integrated research is based on the conventional different-rank geological, geochemical, magmatic, structural, tectonic, lithological and stratigraphical preconditions and signs of sulphide copper-nickel platinum-bearing ore in the Norilsk Region. The geochemical search of ore objects in the Norilsk Region provided the best results in case of the geological and structural analysis of spatial interactions between geochemical abnormalities as the geochemical zonality is yet the chief factor in the mineralization prediction. This method of improvement of geological-geochemical information processing and modeling of mineral deposits was tested in geological-geochemical modeling of the Talnakh ore province bodies. From the research findings, the structural and tectonic conditions of localization of the potentially ore-bearing Tangaralakh intrusion were determined. The structural modeling of geochemical field of the mineralization revealed the types of geochemical associations marking different compositions of sulphide mineralization in disseminated ore in different sections of the Tangaralakh intrusion. It is found that the geochemical zonality coincides with the mineral zonality of the disseminated ore horizon formed at different stages of orogenesis. The similarity elements are found in the geological-geochemical models of the Tangaralakh potentially ore-bearing ore field and Talnakh ore field (ore-magmatic system).

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Valiulienė, G., A. Žielienė i V. Jasulaitienė. "Characteristics of nickel sulphide reduction in Ni2+free background and Watts nickel plating electrolytes". Transactions of the IMF 84, nr 3 (maj 2006): 162–67. http://dx.doi.org/10.1179/174591906x123994.

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Trench, Allan, i Peter K. Williams. "NICKEL: Application of geophysics to nickel sulphide exploration in the Kambalda district, Western Australia". ASEG Extended Abstracts 1994, nr 1 (grudzień 1994): 169–80. http://dx.doi.org/10.1071/asegspec07_10.

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Jagannath Tupe1, Umesh, M. S. Zambare, Arun Vitthal Patil i Prashant Bhimrao Koli. "The binary oxide NiO-CuO nanocomposite based thick film sensor for the acute detection of Hydrogen Sulphide gas vapours". Material Science Research India 17, nr 3 (10.12.2020): 260–69. http://dx.doi.org/10.13005/msri/170308.

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The present research deals with the synthesis of copper oxide and nickel oxide nanoparticles. The nano powder of both NiO-CuO was utilized to fabricate the thick films.Thick films fabricated by screen printing method on glass substrate. The ex-situ doping method was followed for mixing the concentration of nickel oxide in copper oxide lattice. Calculated stoichiometric amount of NiO was loaded during thick film synthesis of CuO.The structure morphology of prepared CuO-NiO nanocomposite thick films was confirmed from x-ray diffraction technique, whichapproves cubic and crystalline CuO-NiO binary nanocomposite. The surface characteristics of the prepared films investigated byscanning electron microscopy that shows homogeneous, porous CuO-NiO nanoparticles with varying dimensions.The prepared thick films of CuO-NiO nanoparticles were analysed for electrical parameter, that assured the prepared material has a semiconducting nature. Further, these thick films promoted for gas sensing interpretation of H2S gas at various temperature and varied gas concentration. Here exclusive reports for hydrogen sulphide gas are reported. The binary CuO-NiO was thoroughly investigated for hydrogen sulphide gas concentration from 50 ppm to 500 ppm at the different temperature. The binary oxide sensor is found to be very sensitive at room temperature and maximum sensitivity response was 75.01 % for H2S gas. Furthermore the response and recovery times are also reported for binary sensor in the present research. The sensor reproducibility cycle was performed forbinary oxide sensor at hydrogen sulphide gas (H2S).

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Wei, J. M., W. W. Wang, M. S. Ma, N. L. Sun, B. Qin, M. C. Li, G. S. Du i in. "Recovery of Scandium, Nickel and Cobalt from Hydrometallurgical Waste of Laterite". Journal of Physics: Conference Series 2686, nr 1 (1.01.2024): 012004. http://dx.doi.org/10.1088/1742-6596/2686/1/012004.

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Abstract Recovery of new-energy critical metals including scandium, nickel and cobalt as well as copper and zinc from a neutralization residue produced in laterite hydrometallurgical process has been studied. Effect of leaching parameters such as acid consumption, solution pH and temperature has been investigated. It was found that scandium, nickel, cobalt and copper could be recovered at high efficiencies from the residues by selective leaching using sulphuric acid solutions under ambient conditions, while the co-leaching of impurities including iron, aluminium and silicon was low under the optimal conditions. The nickel, cobalt, copper and zinc in the leaching solution could be further concentrated into mixed sulphides and separated from impurities by sulphide precipitation.

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Spiridonov, E. M. "Vysotskite holotype as metamorphogenic-hydrothermal vysotskite (Pd,Ni)S from the Norilsk-I deposit". Moscow University Bulletin. Series 4. Geology 1, nr 2 (28.01.2022): 79–86. http://dx.doi.org/10.33623/0579-9406-2021-2-79-86.

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Vysotskite is developed in Co-Ni-Cu sulphide massive and disseminated (“amygdaloid”) ores of the Norilsk-I deposit, entrained by post-trap low-grade metamorphism in the conditions of prehnite-pumpellyite and zeolite (lomontite) facies. Vysotskite associates with ferrian chlorite, cummingtonite, grünerite, prehnite, corrensite, ilvaite, babingtonite, pumpellyite, grinalite, millerite NiS, polydymite Ni3S4, galenite and chalcopyrite. This facies of metamorphosed sulphide ores were formed in the conditions of low oxidative potential and relatively high sulphide sulfur fugacity. This vysotskite is extremely poor in platinum, enriched in nickel and partly in iron. The average composition of studied vysotskite is (wt%, n=17): Pd 65,65; Pt 0,12; Rh, Au traces; Ni 8,25; Fe 0,95; Cu 0,32; Co 0,03; S 25,03; As 0,03; sum 100,38; the formula of the mineral is (Pd0,79Ni0,18Fe0,02Cu0,01)1S1. According to mineral associations and chemical composition, the described vysotskite corresponds to vysotskite discovered by A.D. Genkin and O.E. Zvyagintsev [1962]. Therefore, vysotskite holotype is metamorphogenic-hydrothermal vysotskite of the Norilsk-I deposit with (Pd,Ni)S composition.

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Durrani, Matin. "Ask me anything: Catherine Foley". Physics World 36, nr 11 (1.11.2023): 55. http://dx.doi.org/10.1088/2058-7058/36/11/28.

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Cathy Foley is a solid-state physicist and Australia’s chief scientist. She previously spent more than 35 years at the CSIRO national science agency, where she also served as chief scientist. With research interests in nitride semiconductors and superconducting electronics, she developed a sensor for locating underground deposits of minerals such as nickel sulphide, silver and gold.

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Dzvinamurungu, Thomas, Derek Hugh Rose, Karel Stephanus Viljoen i Antoine Floribert Mulaba-Bafubiandi. "A Process Mineralogical Evaluation of Chromite at the Nkomati Nickel Mine, Uitkomst Complex, South Africa". Minerals 10, nr 8 (12.08.2020): 709. http://dx.doi.org/10.3390/min10080709.

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A process mineralogical study based on three texturally and mineralogically different chromite-bearing ore types at the Nkomati nickel mine was undertaken, with focus on chromite. Chromite is a by-product of the Ni-Cu-Co-PGE ore at Nkomati Nickel mine. These being the PCMZ_MG (medium-grade Ni-Cu sulphide silicate ore with disseminated chromite), PCMZ_HG (high-grade Ni-Cu sulphide silicate ore containing disseminated chromite) and MCHR (massive chromite unit) ore types. These were processed using benchtop flotation followed by gravity concentration using a shaking table at different grind sizes. Quantitative mineralogical data was obtained using a 600F Mineral Liberation Analyser for the unprocessed and processed ores at three selected target grinds. The Mineral Liberation Analyser data indicated that increased milling does not relate to increased chromite grades and recoveries, particularly for the disseminated PCMZ type ores based on laboratory-scale gravity concentration. The recovery is controlled largely by the chromite chemistry. The results also showed that the MCHR samples that underwent a pre-flotation stage before gravity separation had better Cr2O3 grades (45% to 47%) and recoveries (52% to 61%) than MCHR ore that did not undergo a pre-flotation stage, which recorded grades ranging from 44% to 46% and recoveries ranging from 43% to 60%. This holds promise for the blending of MCHR ores with the PCMZ ores. The PCMZ ores also displayed better Cr2O3 grades and recoveries at coarser grinds. The optimal target grind to process all three ore types is a P80 of 75 μm, which is the current grind size employed at Nkomati Nickel mine. Due to the low nickel price and grade the Nkomati Nickel mine is currently under care and maintenance.

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Muniyappa, Murthy, Sagara N. Kalegowda, Manjunath Shetty, Jagadeesh Babu Sriramoju, Mahesh Shastri, Navakoteswara Rao S.V., Debasis De, Shankar M.V. i Dinesh Rangappa. "Cocatalyst free nickel sulphide nanostructure for enhanced photocatalytic hydrogen evolution". International Journal of Hydrogen Energy 47, nr 8 (styczeń 2022): 5307–18. http://dx.doi.org/10.1016/j.ijhydene.2021.11.171.

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Khainasova, T. S. "Bioleaching of sulphide copper-nickel ore at low pulp densities". Mining informational and analytical bulletin, S46 (2020): 239–46. http://dx.doi.org/10.25018/0236-1493-2020-12-46-239-246.

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PATHAK, RAJESH, T. R. MANKHAND, J. S. KACHHAWAHA i P. M. PRASAD. "Kinetics of Lime-Enhanced Hydrogen Reduction of Solid Nickel Sulphide". Mineral Processing and Extractive Metallurgy Review 10, nr 1 (marzec 1992): 109–20. http://dx.doi.org/10.1080/08827509208914079.

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Brand, Nigel W. "Element ratios in nickel sulphide exploration: vectoring towards ore environments". Journal of Geochemical Exploration 67, nr 1-3 (grudzień 1999): 145–65. http://dx.doi.org/10.1016/s0375-6742(99)00063-1.

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Evans, D. M. "Geodynamic setting of Neoproterozoic nickel sulphide deposits in eastern Africa". Applied Earth Science 120, nr 4 (grudzień 2011): 175–86. http://dx.doi.org/10.1179/1743275812z.00000000025.

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Mamuse, Antony, Steve Beresford, Alok Porwal i Oliver Kreuzer. "Assessment of undiscovered nickel sulphide resources, Kalgoorlie Terrane, Western Australia". Ore Geology Reviews 37, nr 3-4 (czerwiec 2010): 141–57. http://dx.doi.org/10.1016/j.oregeorev.2010.02.004.

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