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Dissertations / Theses on the topic 'Mineral beneficiation'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Kola, Trevor Tebogo. "Mineral Beneficiation : a continuing African paradox or a panacea for economic growth and skills development." Diss., University of Pretoria, 2019. http://hdl.handle.net/2263/71589.

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Africa is rich with plentiful mineral resources, yet it is a continent associated with underdevelopment, low economic growth and unskilled labour. Arguments abound that if developing countries added more value to their commodities locally, rather than exporting them to other countries in a raw and unprocessed format, their key economic indicators, such as employment and economic growth, would be enhanced. This study explored debates by scholars and policymakers, who either support or are against the position that mineral beneficiation is a panacea to Africa’s economic challenges. The study exp

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2

Pedrotti, M. "CHROMITE: FROM THE MINERAL TO THE COMMODITY." Doctoral thesis, Università degli Studi di Milano, 2013. http://hdl.handle.net/2434/216116.

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Chromite belongs to the spinel group with the general chemical formula XY2O4, where X and Y represent divalent and trivalent metal ions, respectively. Four types of chromite ore deposits occur as either lode or secondary deposits. Lode chromite ore deposits comprise stratiform and podiform deposits, whereas secondary chromite ore deposits comprise laterite and placer deposits. Chromite is an important industrial mineral used in the refractory industry. Moreover it is the only industrial source of chromium for chemical and metallurgical industries and to be marketed as a valuable commodity it

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3

Hearn, Nikol Anuschka. "An economic impact analysis of mineral beneficiation in Kwazulu-Natal's iron and steel and aluminium value chain." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/15760.

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This paper examines mineral beneficiation within the aluminium and iron & steel industries in Kwazulu-Natal and the associated value chains. Multiplier analysis is used in conjunction with the provincial social accounting matrix to determine the knock on effects of increased beneficiation, exploring the relevant impact of backward linkages. The multipliers created by both direct and indirect stimulation in the downstream industries are examined and the impacts of beneficiation on economic and welfare indicators are assessed. The key findings of the study are that the net effect on regional pro

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4

Vásquez, Beatriz Alicia Firpo. "Produção de solo a partir de rejeito de carvão mineral." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/130124.

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Estima-se que 60 a 70% do carvão ROM (run of mine) de Santa Catarina é descartado em módulos de rejeitos. Para mitigar o impacto ambiental decorrente deste armazenamento, cabe o manejo do rejeito integrando-o à paisagem através da implantação de cobertura vegetal. Neste sentido, este trabalho teve por objetivo propor a produção de solo a partir de rejeito de carvão mineral. Esse solo é passível de ser empregado na própria recuperação de áreas degradadas, evitando a extração de solo em áreas de empréstimo. O método consistiu na coleta e caracterização de rejeito de carvão (substrato), escórias

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5

José, David Selemane. "Estudo de liberação do carvão de Candiota-RS, visando seu beneficiamento." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/37371.

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O presente estudo tem como objetivo à caracterização do carvão de Candiota visando seu beneficiamento. A caracterização do carvão para o seu beneficiamento tem sido de grande importância hoje, uma vez que este recurso mineral representa uma alternativa energética em todo o mundo. Entretanto, a previsão de um bom aproveitamento deste recurso mineral, não passa da necessidade da sua caracterização efetiva. O beneficiamento do carvão tem por objetivo promover a redução do teor de cinza, o aumento do teor da matéria carbonosa e conseqüentemente, do poder calorífico. Além disso, promove a redução d

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6

Feil, Norton Ferreira. "Estudo tecnológico para beneficiamento do carvão da camada Bonito, SC." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/61158.

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O carvão da camada Barro Branco, situado na região sul do estado de Santa Catarina, tem sido amplamente estudado e utilizado, apresentando por esta razão reduzidas reservas. O carvão remanescente da camada Bonito na mesma região é menos conhecido e caracteriza-se pelo alto teor de cinzas e pela alta percentagem de partículas com densidade próxima a do concentrado. Esta peculiaridade torna difícil o seu tratamento nas usinas de beneficiamento atuais, que utilizam jigues para esta finalidade. Os requisitos técnicos do combustível (carvão) exigidos pelas usinas do Complexo Termelétrico Jorge Lace

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7

Rocha, Luciano. "Mineração oceânica: uma alternativa sustentável para o aproveitamento de areias quartzosas." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-14072016-105049/.

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Este estudo apresenta ao Departamento de Engenharia de Minas e Petróleo (PMI) da Escola Politécnica da USP, e também a toda a sociedade, a importância que os oceanos têm com relação às suas riquezas minerais. Pretende ainda mostrar a grande responsabilidade que um empreendimento mineiro no fundo do mar precisa ter, com relação aos impactos ambientais, sendo possível minerar em regiões profundas no oceano promovendo a sustentabilidade. A ideia da mineração oceânica/submarina está ainda sendo amadurecida, este é o momento adequado para se propor metodologias de trabalho submarino sustentáveis; m

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8

Guma, Mondli. "Developing minerals beneficiation flowsheets for eco-efficiency : a systems approach." Master's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/10531.

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Includes bibliographical references (leaves 127-135).<br>Eco-efficiency has been proposed by the World Business Council for Sustainable Development as a performance indicator framework that contributes to sustainability by assisting corporate decision makers improve the environmental performance of their operations and processes, while also extracting additional economic value. Given the emergent importance of eco-efficiency within the business community and the urgency with which environmental impacts generated by the minerals industry need to be mitigated, it becomes apparent that there is a

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9

Hamdadou, Mohammed. "Caractérisation pétro-minéralogique et séquentielle du gisement de phosphate de Djebel Onk (Algérie) : quantification et répartition de l'exo- et endogangue : approche nouvelle du traitement." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL064N.

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Géologie. Au sein de la série phosphatée de Djebel Onk, la formation de Djemidjema correspond en partie à une puissante couche phosphatée de 30 à 35 mètres d'épaisseur sans intercalations stériles. L’analyse séquentielle et l'étude géochimique confirment que les modes granulométriques sont caractéristiques de deux populations de grains phosphates allochtones provenant de deux milieux de genèse différents. La dérive mégaséquentielle granulométrique met en évidence deux mégaséquences d'échelon 4: la mégaséquence A (phosphate à grains fins avec exogangue argilo-carbonatée) ; la mégaséquence B (ph

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10

Kingman, S. W. "The effect of microwave radiation upon the comminution and beneficiation of minerals." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.503062.

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11

Ras, Eugene. "The Development of a continuous improvement model for a South African minerals beneficiation plant." Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/41377.

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South Africa is blessed with a plethora of mineral resources, and as such several mineral beneficiation plants are in operation. In the mining value chain, a processing facility is seen as the bottleneck. The reason for this is quite simple. Large quantities of ore are removed in a highly industrialised process from mining activities. This large amount of ore needs to be beneficiated through capacity constrained processing facilities. In order to maintain an economically viable balance between life of mine, and maximum throughput, a large portion of ore extracted from South Africa is ex

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12

Azizi, Dariush. "Phosphonium/ammonium-based ionic liquids for rare earth minerals beneficiation : case of monazite and bastnäsite." Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/29992.

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Tableau d'honneur de la Faculté des études supérieures et postdoctorales, 2017-2018<br>Cette thèse de doctorat porte sur l'application des liquides ioniques à base de phosphonium et d'ammonium pour l'enrichissement des minéraux à base d'éléments de terres rares. Le manuscrit de thèse a été divisé en quatre parties principales. Tout d'abord, l'utilisation des liquides ioniques à base de phosphonium et d'ammonium a été explorée dans trois procédés différents pour la valorisation des minéraux de terres rares. Ces trois approches ont été examinées pour des minéraux à base d’éléments de terres rare

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13

Kirabira, John Baptist. "Properties of Ugandan minerals and fireclay refractories." Doctoral thesis, KTH, Materials Science and Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-225.

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<p>Development of products which can be produced from a country’s natural resources is very important as far as the industrialization of a nation and saving foreign exchange is concerned. Presently, industries in Uganda and the other states in the Lake Victoria region import all refractory-related-consumables, as the demand cannot be met locally. Based on the abundance of ceramic raw materials for high temperature applications in the region and the demand for refractories by industries it is pertinent to develop and manufacture firebricks by exploiting the locally available raw materials.</p><

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14

Chitaka, Takunda Yeukai. "Sustainability performance analysis and decision-making for minerals beneficiation : a South African iron and steel scrap case study." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/20031.

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It is widely accepted that downstream mineral resource beneficiation has the potential to promote socio-economic growth in resource-rich nations. Many African countries, including South Africa, are thus prioritizing mineral beneficiation in their national policies and development strategies. However, policies with a strict focus on promoting downstream mineral beneficiation may come at the expense of other emerging sectors, as well as overshadow potential economic benefits of cross linkages into lateral sectors. Therefore, when presented with different beneficiation alternatives for a particul

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15

Lainé, Juliette. "Approches multi-échelles pour la flottation inverse des minerais de fer : cas de la kaolinite." Electronic Thesis or Diss., Université de Lorraine, 2023. https://docnum.univ-lorraine.fr/ulprive/DDOC_T_2023_0064_LAINE.pdf.

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Le fer, élément incontournable des activités humaines, est extrait des minerais de fer pouvant contenir de la magnétite, de l’hématite, de la goethite et de la sidérite, associé à des minéraux de gangue comme les silicates. Dans un contexte de baisse de qualité de ces minerais (teneur plus faible en fer, particules plus fines, gangues plus complexes) et une exigence accrue sur la production des concentrés, la flottation apparaît comme le procédé à explorer et à optimiser. La séparation par flottation repose sur l’adsorption sélective de tensioactifs augmentant les contrastes de mouillabilité d

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16

Ferraz, Maria Fátima Freitas. "Sustainability beyond mining: transformations in systems for secondary beneficiation." Thesis, 2012. http://hdl.handle.net/10210/8061.

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Ph.D.<br>Definitions of sustainable development can be grouped according to their ideological orientation and economic paradigm in which they are placed: neoclassical; social and ecological modernisation of neoclassical; and radical. The view of sustainable development predominant in the mining sector aligns with the dominant neoclassical economic paradigm. It is revealed specifically through the system of metrics used, the most obvious of which is profit, shareholder value, and growth. The idea of sustainability is understood in mining as the need to respond to increasing regulation by adding

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17

Hlongwane, Khensane. "Mineral energy complex on the beneficiation policy through the lens of network analysis." Thesis, 2015. http://hdl.handle.net/10539/17043.

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Thesis (M.M. (Public Policy))--University of the Witwatersrand, Faculty of Commerce, Law and Management, School of Governance, 2014.<br>This explanatory sequential thesis examined the Minerals Energy Complex (MEC) as a network of policy stakeholders in South Africa’s beneficiation policy adopted in 2011. The MEC is a set of well-developed industries and institutions that have developed around the mining, energy and financial sectors of the South African economy. The MEC, as Fine and Rustomjee (1996, p. 5) see it, evolves over time depending on the balance and distribution of power amongst

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18

Hunter, David. "Hydrodynamic fractionation of particles using inclined channels." Thesis, 2018. http://hdl.handle.net/1959.13/1391000.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Density‐based washability analysis is an important tool for determining how easily a given coal or mineral feed can be beneficiated, and also for analysing how well a separation unit is operating. However, the existing industry standard float‐sink method for measuring washability has serious limitations. The heavy liquids used are hazardous to operators, and the maximum upper densities are too low to be useful for most dense minerals. Hence the aim of this thesis was to develop a water‐based fractionation technique that could provide density‐b

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19

Kumar, Deepak. "A novel sink-hole fluidization method for dry separation of 1-10 mm particles at cut points above 2500 kg/m³." Thesis, 2020. http://hdl.handle.net/1959.13/1424255.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Increasing water restrictions make it desirable to increase the use of dry processes in mineral beneficiation. Air dense medium fluidized beds (ADMFBs) are one of the most effective methods of dry separation, especially for fine coal and minerals applications. However, dry processes usually struggle to separate particles as efficiently as wet processes, especially for particles finer than about 10 mm. This research was concerned with the separation of 1-10 mm particles of density between 2.4 and 4.8 RD. Experiments were conducted in two phases

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20

Kgoale, Thupane Peshley. "Transformative mineral resources beneficiation legislation : an impetus for socio-economic transformation and poverty alleviation in South Africa." Thesis, 2019. http://hdl.handle.net/10386/2925.

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Thesis (LLM.(Management and Development Law)) -- University of Limpopo, 2019<br>South Africa, like many African States is faced with an increase in the unemployment rate and decrease in economic growth. In terms of Mineral and Petroleum Resources Development Act 28 of 2002 (MPRDA) as amended, the people of South Africa are the owners of mineral resources such as; Platinum Group Metals, Gold, Platinum, and the State is the custodian thereof. The main problem is that the majority of black people in South Africa remain destitute and marginalized. They revolt by demanding radical socio-economic tr

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21

Botha, Brendan William. "Management of the mineral resource risk associated with near-density material in the beneficiation plant at Leeuwpan Coal Mine." Diss., 2008. http://hdl.handle.net/2263/27739.

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Near-density material is material with similar densities to that of the chosen cut-point density during the separation process of coal into product and discard. The problem is usually classified as a beneficiation problem and not as a reserve problem. To overcome the risk associated with near-density material in the beneficiation process, the constraints of the separators must be merged with the constraints of the coal resource. The problems caused by the presence of near-density material in the beneficiation process of raw coal to a certain percentage ash product, are commonly associated with

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22

Radinku, Tshegofatso. "The role of mineral beneficiation in the iron and steel industry: exploiting the linkages in the iron and steel value chain for sustainable development." Thesis, 2018. https://hdl.handle.net/10539/26690.

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A dissertation presented to the University of the Witwatersrand in partial fulfilment of the requirements for the degree of Master of Commerce in Development Theory and Policy in the School of Business and Economic Studies, Johannesburg 2018<br>The research aims to contribute to the existing debate on whether there is merits in South Africa using abundant mineral resources to industrialise. South Africa has abundant mineral resources and a comparative advantage in the supply and production of mining products such as gold, platinum, coal and iron ore. Despite the comparative advantage in minera

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23

Bhengu, Nombuso. "How can South Africa, a resource rich and labour-abundant economy, employ upstream and downstream mineral beneficiation as a way of developing its economy further? A critical focus on the chromium mineral value chain as a case study." Thesis, 2016. http://hdl.handle.net/10539/20482.

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Thesis (M.Com. (Development Theory and Policy))--University of the Witwatersrand, Faculty of Commerce, Law and Management, School of Economic and Business Sciences.<br>South Africa has been referred to as a country of “geological superlatives” because of its rich and diverse mineral resource base. Despite its unique endowment of precious metals and mineral resources, the country has fallen short of translating these resources into the required economic linkages that will lead to sustainable employment creation and economic emancipation for the majority of its people. Whilst the country has est

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24

Borrow, Daniel James. "Beneficiation of dense minerals through agglomeration." Thesis, 2020. http://hdl.handle.net/1959.13/1410929.

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Research Doctorate - Doctor of Philosophy (PhD)<br>This study was concerned with using a high internal phase water-in-oil emulsion as a method to selectively agglomerate and recover naturally hydrophilic particles. In the past, research into the area of selective agglomeration has been based on the use of an organic liquid as a binder. In the previous research, the organic liquid, typically a pure oil, preferentially wets hydrophobic particles and forms an agglomerated product. However, the oil requirements, and subsequent cost, made the process economically unviable. More recently, the develo

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25

Sitando, Onias. "Beneficiation of Zimbabwean petalite : extraction, purification and compound synthesis." Diss., 2012. http://hdl.handle.net/2263/25842.

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Lithium is one of the most strategically important minerals at the time of writing. The demand for lithium and lithium compounds to be used in lithium-ion batteries is increasing day by day. Zimbabwe possesses a considerable resource of lithium ore, estimated at 23 000 mt Li. Beneficiation of this lithium ore could indeed be a very promising business in the near future. This work focuses on processing of petalite concentrate from the Bikita deposit in Zimbabwe for production of Li2CO3, with subsequent preparation of LiF and LiCl. Analysis performed on the petalite showed that the average Li2O

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26

Mweene, Levie. "Polymer-based investigations into the surface chemistry of some sulphide minerals and the beneficiation of a low grade siliceous copper ore." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/4774.

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Tanzania is endowed with rich mineral deposits containing gold, tanzanite, diamond, coal, uranium, iron ore, gemstones with low grade of the sulphide minerals namely chalcopyrite and pyrite. It is the third largest producer of gold in Africa after South Africa and Ghana. It is pertinent to note that the ores in Tanzania composed of mainly base metals, namely copper in the form of chalcopyrite, disseminated in silicates, in some locations of Mpanda Mineral Field (MMF) are rarely beneficiated. This is due to the presence of large proportions of silica slimes, present in the lean grade ores of co

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