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Dissertations / Theses on the topic 'Nickel ores'

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Published: 4 June 2021
Last updated: 29 July 2024

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1

Buyukakinci, Ergin. "Extraction Of Nickel From Lateritic Ores." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609291/index.pdf.

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The aim of this study was to extract nickel and cobalt from the lateritic nickel ores of G&ouml<br>rdes region by hydrometallurgical methods under the optimum conditions. Limonitic and nontronitic types of G&ouml<br>rdes lateritic nickel ores were used during experiments. Agitative and column leaching experiments at atmospheric pressure were conducted with various parameters<br>these were duration, temperature and initial sulfuric acid concentration of leach solution. It was shown that in agitative leaching, under the optimum conditions that were determined as 24 hours of leaching at 95&deg<
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2

Kose, Caner Hakki. "Hydrometallurgical Processing Of Lateritic Nickel Ores." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612295/index.pdf.

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The objective of this thesis study is to recover nickel and cobalt at maximum efficiency from column leach liquor of lateritic nickel ores existing in G&ouml<br>rdes region of Manisa by performing various hydrometallurgical methods under the optimum conditions. This column leach solution of nontronite type lateritic nickel ore was initially neutralized and purified from its basic impurities by a two stage iron removal process under the optimum conditions determined experimentally. Then, nickel and cobalt were precipitated in the form of mixed hydroxide precipitate from the purified leach solut
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3

Ho, Elizabeth M. "An electrochemical study of reactions of nickel matte in acid media." Murdoch University, 1998. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20060815.140539.

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Nickel matte is a nickel &de concentrate produced by smelting. It consists mainly of two components: a nickel-copper alloy and heazlewoodite (Ni3S2); but also contains varying amounts of djurleite,Cu 1.96 S.There are several hydrometallurgical routes for processing nickel matte. The most recent of these involves an oxidative leach in acid chloride or sulfate solution. Nickel is subsequently recovered fiom the leach solution by electrowinning or by hydrogen reduction. In the work described in this thesis, various aspects of the acid leaching of nickel matte are investigated using mostly electro
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4

Ho, Elizabeth M. "An electrochemical study of reactions of nickel matte in acid media." Thesis, Ho, Elizabeth M. (1998) An electrochemical study of reactions of nickel matte in acid media. PhD thesis, Murdoch University, 1998. https://researchrepository.murdoch.edu.au/id/eprint/98/.

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Nickel matte is a nickel sulfide concentrate produced by smelting. It consists mainly of two components: a nickel-copper alloy and heazlewoodite (Ni3S2); but also contains varying amounts of djurleite, Cu1.96S. There are several hydrometallurgical routes for processing nickel matte. The most recent of these involves an oxidative leach in acid chloride or sulfate solution. Nickel is subsequently recovered fiom the leach solution by electrowinning or by hydrogen reduction. In the work described in this thesis, various aspects of the acid leaching of nickel matte are investigated using mostly ele
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5

Weatherwax, Trent. "Integrated mining and preconcentration systems for nickel sulfide ores." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/238.

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As part of a strategic research initiative at UBC to design and evaluate integrated underground mining and mineral processing systems, work has been done to determine how to utilize the coarse rejects of pre-concentration in the underground environment. An amenability study for nine orebodies from four of Xstrata Nickel’s Ontario operations evaluated both processing and waste disposal methods. Metallurgically the orebodies showed amenability to dense media separation and conductivity sorting. The dense media results showed high mass rejections and high metal recoveries for all nine orebodies
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6

Giovenazzo, Danielle. "Géologie et caractéristiques géochimiques des minéralisations Ni-Cu-EGP de la région de Delta, ceinture de Cape-Smith, Nouveau-Québec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1991. http://theses.uqac.ca.

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7

Nimah, Ulfa. "Investigation of Secondary Reactions in Bioleaching of Nickel Laterite Ores." Thesis, The University of Sydney, 2019. http://hdl.handle.net/2123/21124.

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This thesis investigated the impact of secondary reactions; adsorption and precipitation, on nickel and cobalt recovery from bioleaching of nickel laterite ores. Although bioleaching is considered an ecologically and energy friendly technique to process laterite ores, low recoveries of target metals have inhibited its commercialisation. The secondary reactions occurrence in bioleaching of limonite, fresh and weathered saprolite ores was verified by performing chemical leaching tests using sulphuric and citric acid that would be generated by chemolithotrophs and heterotrophs respectively. The f
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8

Gaw, Daryl Corbin. "Manganese Removal from Sulfuric Acid Leach Solutions of Nickel Laterite Ores." Thesis, Curtin University, 2020. http://hdl.handle.net/20.500.11937/81026.

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An oxidative precipitation technique using potassium permanganate was explored for the removal of manganese from pregnant leach solution (PLS) generated from the pressure acid leaching (PAL) of nickel laterite ores. The results revealed that the right combination of pH and molar ratio is important in order to achieve maximum removal of manganese (II) with minimum nickel (II) and cobalt (II) losses.
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9

Chang, Xiangning. "Short term sublethal studies in rats exposed to nickel subsulfide and nickel ore : effects on oxidative damage, antioxidant and detoxicating enzymes /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ55491.pdf.

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10

Thériault, Robert. "Influence de l'assimilation de roches sédimentaires encaissantes sur l'origine des gisements de Cu-Ni-EGP de l'intrusion de Partridge River, complexe de Duluth, Minnesota /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1999. http://theses.uqac.ca.

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11

Heckley, Philip Scott. "Extraction and separation of cobalt from acidic nickel laterite leach solutions using electrostatic pseudo liquid membrane (ESPLIM)." Thesis, Curtin University, 2002. http://hdl.handle.net/20.500.11937/2188.

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Approximately 70% of the western world's known nickel reserves are contained in laterite ores, but only 30% of the world's nickel production comes from these ores. This is due to the lack of economically viable technology to extract the nickel from these ores. However, recent advances in pressure acid leaching technology have resulted in new commercial attempts to extract nickel and its valuable by-product, cobalt, from laterite ores. The commissioning of three nickel laterite projects in Western Australia in the late 1990s represents the first of these new generation nickel operations, with s
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12

Bandyayera, Daniel. "Formation des latérites nickélifères et mode de distribution des éléments du groupe du platine dans les profils latéritiques du complexe de Musongati, Burundi /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1997. http://theses.uqac.ca.

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13

Tremblay, Christian. "Les éléments du groupe du Platine dans le dyke de Méquillon ceinture de Cape-Smith, Nouveau-Québec /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1990. http://theses.uqac.ca.

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14

Lipp, Ulrich, and Siegfried Flach. "Wismut-, Kobalt-, Nickel- und Silbererze im Nordteil des Schneeberger Lagerstättenbezirkes." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-79017.

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Der Schneeberger Lagerstättenbezirk weist eine über 500 Jahre alte bergbauliche Geschichte auf. In dem Mitte des letzten Jahrhunderts aufgeschlossenen Lagerstättenteil Schlema-Alberoda befasst sich vorliegende Monographie mit den Bi-Co-Ni- und Ag-erzführenden Gängen, die die Schichtenfolge der Lößnitz-Zwönitzer Mulde durchschlagen. Die Gänge sind an die Hüllgesteine im nordwestlichen Teil des Kontakthofes zum Granitmassiv von Aue gebunden. Ihre Zonalität bedingt eine Zonalität der Spaltenbildung, die sich in einer unterschiedlichen Intensität und einer abnehmenden Anzahl von Gangsystemen und G
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15

Lipp, Ulrich, and Siegfried Flach. "Wismut-, Kobalt-, Nickel- und Silbererze im Nordteil des Schneeberger Lagerstättenbezirkes." Sächsisches Landesamt für Umwelt, Landwirtschaft und Geologie, 2003. https://slub.qucosa.de/id/qucosa%3A1649.

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Der Schneeberger Lagerstättenbezirk weist eine über 500 Jahre alte bergbauliche Geschichte auf. In dem Mitte des letzten Jahrhunderts aufgeschlossenen Lagerstättenteil Schlema-Alberoda befasst sich vorliegende Monographie mit den Bi-Co-Ni- und Ag-erzführenden Gängen, die die Schichtenfolge der Lößnitz-Zwönitzer Mulde durchschlagen. Die Gänge sind an die Hüllgesteine im nordwestlichen Teil des Kontakthofes zum Granitmassiv von Aue gebunden. Ihre Zonalität bedingt eine Zonalität der Spaltenbildung, die sich in einer unterschiedlichen Intensität und einer abnehmenden Anzahl von Gangsystemen und G
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16

Ozdemir, Veysel. "Hydrometallurgical Extraction Of Nickel And Cobalt From Caldag Lateritic Ore." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607777/index.pdf.

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In this study, an attempt has been made to hydrometallurgical extraction of cobalt and nickel by atmospheric pressure sulphuric acid leaching and a pug-roast-leach process using two stage roasting for lateritic ore. The ore used in the study was obtained from &Ccedil<br>aldag Lateritic Ore, Manisa, Turkey. The metal contents of the ore are 2.1 % Ni, 0.12 % Co, 32.45 % Fe, 1.01 % Mn, 2.58 % Cr, 0.78 % Mg and 1.01 % Al. The reserve of lateritic ore deposit is approximately 40 million tonnes. In the study, first sulphuric acid leaching was applied at atmospheric pressure for leaching the &Ccedil<
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17

Heckley, Philip Scott. "Extraction and separation of cobalt from acidic nickel laterite leach solutions using electrostatic pseudo liquid membrane (ESPLIM)." Curtin University of Technology, Western Australian School of Mines, 2002. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=14124.

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Approximately 70% of the western world's known nickel reserves are contained in laterite ores, but only 30% of the world's nickel production comes from these ores. This is due to the lack of economically viable technology to extract the nickel from these ores. However, recent advances in pressure acid leaching technology have resulted in new commercial attempts to extract nickel and its valuable by-product, cobalt, from laterite ores. The commissioning of three nickel laterite projects in Western Australia in the late 1990s represents the first of these new generation nickel operations, with s
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18

Sibbick, Steven John Norman. "The distribution and behaviour of gold in soils in the vicinity of gold mineralization, Nickel Plate mine, southern British Columbia." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28862.

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Sampling of soils and till are conventional methods of gold exploration in glaciated regions. However, the exact nature of the residence sites and behaviour of gold within soil and till are poorly known. A gold dispersion train extending from the Nickel Plate mine, Hedley, southwest British Columbia, was investigated in order to determine the distribution and behaviour of gold within soils developed from till. Three hundred and twelve soil, till and humus samples (representing LFH, A, B and C horizons) were collected from fifty-two soil pits and thirty-four roadcut locations within the disper
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19

Azevedo, Luiz Otavio Roffee. "Infra-Red Spectrophotometry and X-Ray Diffractometry as Tools in the Study of Nickel Laterites." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/231213.

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Nickel silicate laterite deposits developed on ultra-mafic rocks are similar in many general respects but they vary considerably in detail. The mineralogy of these surficial deposits is very complex and difficult to determine because of the fine grained nature and solid solution characteristics of the hydrous secondary minerals and because many of the phases are actually mineraloids that are poorly ordered or amorphous. To try some new approaches toward clarification of these phases, 24 samples from New Caledonia and Puerto Rico ranging from the ophiolite-ultramafic olivine-pyroxene-chromite-s
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20

Mehlape, Mofuti Amos. "Computational modeling studies of cobalt pentlandite (Co₉S₈)." Thesis, University of Limpopo (Turfloop Campus), 2013. http://hdl.handle.net/10386/984.

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Thesis (Ph.D. (Physics)) --University of Limpopo, 2013<br>The intention of the current study is to investigate structure, ion transport and reactivity of various forms of the cobalt pentlandite, Co9S8, at different temperatures using atomistic simulation methods with the support of electronic structure calculations. The first interatomic potentials of Co9S8 were derived with input data as structure and elastic properties from experiment and electronic structure calculations respectively. The potentials were validated by running energy minimization and molecular dynamics calculations. Structure
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21

Onal, Mehmet Ali Recai. "Pressure Leaching Of Caldag Lateritic Nickel Ore." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615480/index.pdf.

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The purpose of this study was to investigate the process optimization of combined high pressure acid leaching (HPAL) and mixed hydroxide precipitation (MHP) route for the extraction of nickel and cobalt from &Ccedil<br>aldag lateritic nickel ore. In order to extract nickel and cobalt values into pregnant leach solution (PLS), several process parameters of HPAL including acid load, temperature, leaching duration and particle size were investigated in comparative manner at constant solid concentration and agitation speed. After HPAL trials, it has been found that more than one combination of par
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22

Sabau, Adrian I. "Laboratory studies on magnetoflotation of Falconbridge nickel ore." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0001/MQ31465.pdf.

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23

Kanhai, Todd M. "The effect of shotcrete on the flotation nickel recoveries and selectivities of Falconbridge nickel-copper ore." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0009/MQ61272.pdf.

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24

Cameron, Rory. "Bioleaching of low-grade nickel sulphide ore at elevated pH." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19784.

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This thesis examines the bioleaching of six different Canadian nickel sulphide ores at pH levels above what is generally considered optimum (~ 2). The majority of work discussed in this thesis was conducted with a low-grade metamorphosed ultramafic nickel sulphide ore from Manitoba, Canada (Ore 3), which is not currently exploitable with conventional technologies. The ore contains 21% magnesium and 0.3% nickel. Nickel is the only significant metal value, and is present primarily as pentlandite. A substantial fraction of the magnesium is present as the serpentine mineral lizardite, making proce
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25

Uddin, Salah. "Surface charge characterization and flotation of an ultramafic nickel ore." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107688.

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AbstractAbout 300 million tonnes of inferred Ni resource in ultramafic hosted rocks is present in 'Thompson Nickel Belt' in north central Manitoba. The processing challenges result from electrostatic interaction between pentlandite (the main Ni-mineral) and serpentine (the main gangue and one of the MgO minerals). As a contribution to meeting the challenge, the thesis examines the role of particle and bubble surface charge and the effect of fibre disintegration on flotation behavior of an ultramafic Ni ore sample. For surface charge characterization the sedimentation potential technique was us
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26

Field, Karen Louise. "Atmospheric leaching of a saprolytic nickel laterite ore in chloride solutions." Master's thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/5612.

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27

Goveli, Ahmet. "Nickel Extraction From Gordes Laterites By Hydrochloric Acid Leaching." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607738/index.pdf.

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Leaching is the most widely used process for extraction of nickel metal from lateritic ores. In this study, nickel extraction from Manisa-G&ouml<br>rdes region laterites by hydrochloric acid leaching is aimed. The mineralogical analysis of sample showed that hematite, goethite, dolomite, quartz and smectite are the main minerals in the ore. Attrition scrubbing, cycloning and magnetic separation with permroll were used as preconcentration processes but results were unsatisfactory. HCl leaching experiments were conducted both at room temperature and at elevated temperatures. The effects of vario
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28

Pillay, Keshree. "Mineralogical effects on the dense medium separation of low grade nickel sulfide ore." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/13751.

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Dense medium separation (DMS) is a method often used to upgrade base metal sulfide (BMS) ores before their main processing stage, with varying results achieved for different ore types. The process makes use of the density differences between the BMS minerals and the lower density silicate/carbonate gangue minerals, using a separating medium of density between the two ore components. The separation is accelerated using a dense medium cyclone (DMC) to form two products: overflow (tailings) and underflow (concentrate). The purpose of DMS is to reject large quantities of gangue upfront, resulting
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29

Ugwu, Ifeoma Mary. "Sorption of nickel and cobalt on goethite with application to laterite ore formation." Thesis, University of Bristol, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.691177.

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Nickel extracting industries have been facing challenges reflecting, inter alia, low recoveries of Ni and Co, high acid consumption and inadequate knowledge of dissolution kinetics. In oxic laterite, Ni is mostly associated with goethite. Consequently, for effective extraction of Ni and Co from oxic Ni laterites, a clear understanding of their chemistry, mineralogy and mechanism of sorption in goc;!thite during laterite ore formation is essential. The result from experiment of Ni sorption on goethite revealed that at surface loadings of 0.003 to 0.2 wt. % Ni, only the >Fe(OH)2Ni complex was ne
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30

Franchuk, Anatoliy. "HIGH TENOR NI-PGE SULFIDE MINERALIZATION OF THE SOUTH MANASAN ULTRAMAFIC INTRUSION, THOMPSON NICKEL BELT, MANITOBA." Thesis, Laurentian University of Sudbury, 2014. https://zone.biblio.laurentian.ca/dspace/handle/10219/2195.

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The South Manasan ultramafic intrusion (ca. 1880 Ma) located in the Early Proterozoic Thompson Nickel Belt (TNB) contains Ni and platinum group element (PGE) mineralization hosted by disseminated sulfide. Whole-rock Ni values range from 0.3 to 1.7 wt. % and total precious metals (TPMs) range from 0 to 1.3 ppm Pt + Pd + Au and equate to tenor values (i.e., metal in 100% sulfide) of 11-39 wt. % Ni and 8-27 ppm TPMs. The South Manasan intrusion is a steeply dipping sill-like body with a boudinaged outline having a strike length of approximately 1200 m, average width of 125 m and a minimum depth e
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31

Kilickaplan, Isil. "Effect of pulp rheology on flotation : the nickel sulfide ore with asbestos gangue system." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/12765.

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Pulp rheology is a sensitive indicator of the state of aggregation/dispersion of mineral particles. In this study, possible correlation between the rheological properties of flotation pulp and the flotation response was investigated through a series of rheological and batch flotation tests. The nickel-sulfide ore from the Mt. Keith plant (Western Australia) was used for the tests. It is a low-grade nickel sulfide ore which is characterized by complex mineralogical composition with a large content of serpentine minerals. The experimental program included agglomerate flotation tests and rheolog
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32

Pappas, Adlerburg Nickolas T. "To Make Iron of Iron : A Comprehensive Analytical Study of Spade Shaped Iron Bars." Thesis, Stockholms universitet, Arkeologiska forskningslaboratoriet, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-144383.

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This thesis aims to provide adequate analytical information on the spade shaped iron bars of Norrland and central Sweden. While their significance has been thoroughly debated for decades, analytical research on them has been confined to cases of single artefacts or theoretical interpretations of their value, meaning and origin. In this study a comprehensive approach is taken into consideration. Based on X-Ray fluorescence (XRF), scanning electron microscopy (SEM) and metallographical analysis this thesis seeks to facilitate new interpretations on quality, production centres and usage based on
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33

Brenner, Thomas Lafayette [UNESP]. "The fortaleza de minas nickel, copper and platinoids deposit: ore types, tectonics and volcanological aspects." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/103043.

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Made available in DSpace on 2014-06-11T19:32:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-10-27Bitstream added on 2014-06-13T20:03:47Z : No. of bitstreams: 1 brenner_tl_dr_rcla.pdf: 5393143 bytes, checksum: 7eaa1af514649401cca544334b60985f (MD5)<br>O depósito de Fortaleza de Minas vem sendo estudado a mais de 20 anos desde a sua descoberta em 1983 e apresenta similaridades com outros depósitos komatiíticos arqueanos descritos na literatura. Sua configuração atual reflete ação de processos metamórficos e deformacionais diversos gerando novos tipos de minério sem, no entanto, per
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34

Sandré, Anne-Laure. "Nouveau procédé de dissolution-précipitation pour l’exploitation de minerais nickélifères oxydés par voie hydrométallurgique : études cinétiques, modélisation et calcul de réacteurs." Thesis, Paris, ENMP, 2012. http://www.theses.fr/2012ENMP0037.

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L'objectif de cette thèse est de bâtir un modèle prédictif d'une unité industrielle continue de dissolution de minerai de nickel/ et précipitation de fer simultanées. La méthodologie adoptée consiste dans un premier temps à réaliser des expériences en réacteur fermé ou semi-fermé pour identifier et modéliser séparément les différents phénomènes en jeu, puis dans un second temps à construire un modèle d'unité continu les rassemblant tous. Ce travail a permis certaines avancées tant sur le système retenu que sur les méthodes et modèles adoptés. Tout d'abord la thermodynamique des solutions Na-Fe
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35

Gencturk, Bilgehan. "Nickel Resource Estimation And Reconciliation At Turkmencardagi Laterite Deposits." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614978/index.pdf.

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In recent years nickel is mostly produced from lateritic ore deposits such as nontronite, limonite, etc. Resource estimation is difficult for laterite deposits as they have a weak and heterogeneous form. 3D modeling software are rather suitable for deposits having tabular or vein type ores. In this study the most appropriate estimation technique for resource estimation of nickel laterite deposits was investigated. One of the known nickel laterite deposits in Turkey is located at T&uuml<br>rkmen&ccedil<br>ardagi - G&ouml<br>rdes region. Since the nickel (Ni) grade recovered from drilling stud
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36

Becker, Megan. "The mineralogy and crystallography of pyrrhotite from selected nickel and PGE ore deposits and its effect on flotation performance." Thesis, Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-09272009-100136/.

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37

Myagkiy, Andrey. "Mineralization of Nickel in saprolitic ore of New Caledonia : Dynamics of metal transfer and modeling of coupled geochemical and hydrodynamic processes." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0277/document.

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La Nouvelle-Calédonie détient d’importantes réserves de nickel latéritique et est devenue, en 2017, le cinquième producteur mondial de Ni. Ces dépôts sont habituellement considérés comme résultant d’altération latéritique intense de la péridotite, qui constitue la principale source de nickel. Ainsi, le principal modèle conceptuel de la formation des minerais de nickel latéritique en Nouvelle-Calédonie est un modèle per descensum où la plupart des éléments (Mg, Ni et Si) ont été lessivés depuis la surface, en particulier lors du développement du sol latéritique. Le nickel est ensuite reprécipit
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38

Perez, Isadora Dias. "Recuperação de cobre de uma solução sintática baseada no licor de lixiviação atmosférica do minério limoní­tico de níquel por troca iônica utilizando a resina quelante Dowex." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-04052018-142357/.

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Em virtude das várias aplicações do cobre, acredita-se que a demanda por esse metal irá aumentar nos próximos anos, e consequentemente, o seu preço. Dessa forma, as mineradoras enfrentam o desafio de aprimorar e aperfeiçoar os processos produtivos a fim de atender sua futura demanda. Frações de cobre podem ser encontradas no licor de lixiviação do minério limonítico de níquel e a troca iônica com adsorvente sólido é uma das tecnologias disponíveis para promover a sua recuperação e o seu reaproveitamento. O presente trabalho teve como objetivo estudar o processo de adsorção dos íons de cobre pr
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39

Jardine, Mitchel. "Three dimensional quantitative textural analysis of nickel sulphide ore using X-ray computed tomography and grey level co-occurrence matrices on drill core." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20489.

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Alongside the global trend to mine and process lower grade and more mineralogically complex ores, there has been an increased awareness of the prevalence of ore heterogeneity. Ore texture - the interrelationship of minerals comprising a rock, has been identified as one of the primary geometallurgical indicators of ore variability. It is well known that a relationship exists between ore texture and the resultant metallurgical performance (ore hardness, throughput, liberation, grade, recovery). Consequently, there exists a need to rapidly, routinely, cost effectively, and reliably quantify ore t
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Michaud, Michael Julien. "The geology, petrology, geochemistry and platinum-group element-gold-copper-nickel ore assemblage of the Roby Zone, Lac des Iles mafic-ultramafic Complex, northwestern Ontario." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0027/MQ52068.pdf.

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Brenner, Thomas Lafayette. "The fortaleza de minas nickel, copper and platinoids deposit : ore types, tectonics and volcanological aspects = A jazida de níquel, cobre e platinóides de fortaleza de minas : aspectos tectônicos, vulcanológicos e tipos de minérios /." Rio Claro : [s.n.], 2006. http://hdl.handle.net/11449/103043.

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Orientador: Sebastião Gomes de Carvalho<br>Banca: Aroldo Misi<br>Banca: Yociteru Hasui<br>Banca: Jorge Silva Bettencourt<br>Banca: Antenor Zanardo<br>O presente trabalho reúne 3 artigos científicos, já formalizados para publicação em revistas internacionais, foi confeccionado para ser apresentado como tese de doutorado<br>Artigos em inglês, introdução e resumo em português<br>Resumo: O depósito de Fortaleza de Minas vem sendo estudado a mais de 20 anos desde a sua descoberta em 1983 e apresenta similaridades com outros depósitos komatiíticos arqueanos descritos na literatura. Sua configuração
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Aliprandini, Paula. "O uso da extração por solventes para tratamento de licor de lixiviação de minério limonítico de níquel." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-23022017-110109/.

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O minério limonítico de níquel é considerado uma fonte de níquel e cobalto a partir de mineração. No entanto, o minério é heterogêneo e a concentração dos metais varia conforme a localização. Sendo assim, é necessário o desenvolvimento de uma metodologia que permita determinar os parâmetros de operação de um processo de separação de metais levando em consideração a composição de cada minério. No processo hidrometalúrgico, diversas técnicas de purificação ou separação dos metais podem ser usadas. O presente trabalho estudou o uso da extração por solventes para tratar o licor baseado no lixiviad
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Contessotto, Renato. "Classificação de domínios mineralógicos e caracterização de minérios de níquel da mina de Santa Rita - BA, em apoio à geometalurgia." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-22062017-141549/.

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A Mina de Santa Rita, situada no complexo máfico-ultramáfico Fazenda Mirabela, é uma intrusão máfica-ultramáfica, mineralizada a sulfetos de níquel e cobre, situada no sudeste do Estado da Bahia, município de Itagibá. Esse depósito é composto por rochas de idade Paleoproterozóica, metamorfizadas em fácies granulito. Os sulfetos de níquel e cobre ocorrem disseminados e, preferencialmente, associados a harzburgitos, olivina ortopiroxenitos e ortopiroxenitos. O minério é composto por uma grande variedade de Mg-silicatos, sendo que o níquel ocorre essencialmente como pentlandita nos peridotitos, a
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Pappas, Adlreburg Nickolas. "To Make Iron of Iron : A Comprehensive Analytical Study of Spade Shaped Iron Bars." Thesis, Stockholms universitet, Arkeologiska forskningslaboratoriet, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-145694.

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This thesis aims to provide adequate analytical information on the spade shaped iron bars of Norrland and central Sweden. While their significance has been thoroughly debated for decades, analytical research on them has been confined to cases of single artefacts or theoretical interpretations of their value, meaning and origin. In this study a comprehensive approach is taken into consideration. Based on X-Ray fluorescence (XRF), scanning electron microscopy (SEM) and metallographical analysis this thesis seeks to facilitate new interpretations on quality, production centres and usage based on
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Kahn, Riyard. "Optimisation of reagent addition during flotation of a nickel sulphide ore at the Nkomati Mine concentrator." Thesis, 2017. http://hdl.handle.net/10539/22965.

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A dissertation submitted to the faculty of Engineering and the Built Environment, University of Witwatersrand in fulfilment of the requirements for the degree of Master of Science in Engineering 28 January 2017<br>Batch scale laboratory testwork was conducted to evaluate collector and depressant addition on flotation performance of a nickel sulphide ore. The objectives of the study were to: 1. develop an understanding of the effects of collector and depressant dosage, and its interactive effects, on flotation performance and 2. determine the effect of stage dosing collector and depressant o
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Clissold, Meagan E., University of Western Sydney, College of Health and Science, and School of Natural Sciences. "Aspects of the supergene geochemistry of copper, nickel and bismuth." 2007. http://handle.uws.edu.au:8081/1959.7/11433.

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The solution geochemical conditions associated with the development of supergene copper mineralisation in the E22, E26 and E27 deposits at Northparkes, New South Wales, have been explored. Determination of a stability constant for sampleite [NaCaCu5(PO4)4Cl·5H2O], a conspicuous species in the upper oxidised zone of E26, has led to an understanding of the differences between the three deposits in terms of the influence of groundwater geochemistry on their mineralogical diversity. Modelling of copper dispersion from the three deposits using current ground water compositions as proxies for past s
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Clissold, Meagan E. "Aspects of the supergene geochemistry of copper, nickel and bismuth." Thesis, 2007. http://handle.uws.edu.au:8081/1959.7/11433.

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The solution geochemical conditions associated with the development of supergene copper mineralisation in the E22, E26 and E27 deposits at Northparkes, New South Wales, have been explored. Determination of a stability constant for sampleite [NaCaCu5(PO4)4Cl·5H2O], a conspicuous species in the upper oxidised zone of E26, has led to an understanding of the differences between the three deposits in terms of the influence of groundwater geochemistry on their mineralogical diversity. Modelling of copper dispersion from the three deposits using current ground water compositions as proxies for past s
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Pietrobon, Michael C. "Chemical aspects in the flotation of pentlandite in Western Australian nickel ores." 1996. http://arrow.unisa.edu.au:8081/1959.8/84872.

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Chiwundura, Phillip. "Application of indicator kriging and conditional simulation in assessment of grade uncertainty in Hunters road magmatic sulphide nickel deposit in Zimbabwe." Thesis, 2017. https://hdl.handle.net/10539/24082.

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A research project report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, in fulfilment of the requirements for the degree of Masters of Science in Engineering, 2017<br>The assessment of local and spatial uncertainty associated with a regionalised variable such as nickel grade at Hunters Road magmatic sulphide deposit is one of the critical elements in the resource estimation. The study focused on the application of Multiple Indicator Kriging (MIK) and Sequential Gaussian Simulation (SGS) in the estimation of recoverable resourc
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Chen, Zhongxing. "Development of micro-sampling techniques utilizing inductively coupled plasma-mass spectrometry (ICP-MS) and their application to geochemical studies of precious metal-rich nickel-copper ores at Sudbury /." 1993. http://collections.mun.ca/u?/theses,120173.

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