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Dissertations / Theses on the topic 'Pyrometallurgy'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Cowx, Peter M. "An evaluation of thermal plasmas in pyrometallurgy." Thesis, Aston University, 1988. http://publications.aston.ac.uk/11906/.

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The development of reliable, high powered plasma generators has resulted in many plasma processes being proposed as alternatives to existing pyrometallurgical technologies. This work evaluates the advantages and disadvantages of plasma systems by reviewing plasma generators, their integration with reactors and the process economics. Many plasma systems were shown to be technically and economically superior to existing technologies, but some of the plasma system advantages quoted in the literature were found to be impractical because of other system constraints. Process applications were limite

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2

Sunyer, i. Borrell Alba. "Arsenic inertization through alunite-type phases: Application to copper pyrometallurgy." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/128666.

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Nowadays, arsenic is an important problem in water pollution. Non-ferrous metallurgical industries generate arsenic residues because the ores contain this mineral. The high technology improvement is increasing the demand of some metals such as copper. This increasing demand and the scarce of copper ores with low arsenic content is generating a problem with arsenic wastes in lots of countries, but especially in Asia and in South and Central America. In these countries, groundwater is polluted by arsenic and generates health problems to the inhabitants. With the aim to precipitate and control th

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3

Banda, Wezi. "High temperature phase equilibria in the Fe-Co-Cu-Si system pertinent to slag cleaning." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019.1/1351.

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4

Nadir, El-Habib. "Etude expérimentale des échanges de matière dans un procédé pyrométallurgique de retraitement de déchets métalliques." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0023.

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Le travail presente a porte sur les echanges de matiere dans un procede de fusion, en creuset froid, de dechets metalliques de gainage usage de combustibles nucleaires. Le but de cette etude etait d'evaluer la possibilite d'utiliser un melange de sels fondus, comme flux de fusion, afin d'ameliorer le pouvoir decontaminant du procede. Il a ete presente en deux parties: - une premiere partie, consacree a l'etude de la dissolution des oxydes (uo#2 et zro#2) dans des solvants a base de fluorures: cryolithes (lithium et sodium) et melanges caf#2-baf#2. Des mesures de solubilite ont ete concues et r

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5

Kwatara, Munyaradzi. "Chromium deportment in copper matte equilibrated with CrxO-containing slag." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019/1082.

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6

Wearmouth, Alan. "Pyrometallurgical studies on copper, zinc and lead." Thesis, Teesside University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329194.

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7

Sundstrom, Ashley William. "The development of a simulative hybrid model for optimising the production of a high-carbon ferromanganese furnace." Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/2901.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2009.<br>ENGLISH ABSTRACT: A project was initially commenced for optimising the production output at a specific high-carbon ferromanganese furnace. Since operational difficulties were experienced in this furnace and with a lack of reliable data for the year 2007, it was decided that data from a more stable high-carbon ferromanganese furnace should be analysed instead. Three key performance indicators (KPI’s) were selected to give an indication of overall process performance. These were: (1) the total tonnes of high-carbon

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8

Stadler, S. A. C. (Susanna Aletta Carolina). "An experimental study of slag foaming." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52669.

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Thesis (MScEng)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: Slag foaming occurs in several pyrometallurgical processes. These processes include steelmaking in basic oxygen steelmaking furnaces and electric arc furnaces (EAF) as well as various non-ferrous operations like sulphide smelting/converting and base metal slag cleaning. Although slag foaming in steelmaking processes has been extensively researched, little attention has been given to slag foaming in non-ferrous operations. Slag foaming phenomena are complex because often the system consists of three or more phases. T

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9

Chinyama, Luzendu Gabriel. "Recovery of Lithium from Spent Lithium Ion Batteries." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59866.

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Batteries have found wide use in many household and industrial applications and since the 1990s, they have continued to rapidly shape the economy and social landscape of humans. Lithium ion batteries, a type of rechargeable batteries, have experienced a leap-frog development at technology and market share due to their prominent performance and environmental advantages and therefore, different forecasts have been made on the future trend for the lithium ion batteries in-terms of their use. The steady growth of energy demand for consumer electronics (CE) and electric vehicles (EV) have resulted

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10

Banda, Wezi. "Pyrometallurgical recovery of cobalt from waste reverbaratory furnace slag by DC plasma-ARC furnace technology." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52425.

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Thesis (MScEng.)--University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: Slag cleaning has become a common practice at many smelters in the nonferrous industry to maximize recovery of valuable metals. However, during the carbothermic reduction of nonferrous slag to recover cobalt, in particular, iron is recovered predominantly. High iron levels present a problem for the subsequent treatment of the alloy as it may increase the solids loading to the filter and lead to increased reagent consumption during leaching. Finding an appropriate slag modifier that would selectively improve the reco

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11

Eksteen, Jacobus Johannes, M. A. Reuter, and S. M. Bradshaw. "A generic, semi-empirical approach to the stochastic modelling of bath-type pyrometallurgical reactors." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/14771.

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Thesis (PhD)--University of Stellenbosch, 2004.<br>388 leaves printed on single pages, preliminary pages i- xv and numbered pages 1-371. Includes bibliography, list of tables and figures.<br>Digitized at 330 dpi black and white and 330 dpi color PDF format (OCR), using KODAK i 1220 PLUS scanner.<br>ENGLISH ABSTRACT: Bath type furnaces have become an established technology for the intensive smelting, converting and refining of primary and secondary raw materials. Since these furnaces normally have large inventories, long time constants and complex metallurgies, a dynamic model-based predict

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12

Cardakli, Ismail Seckin. "Production Of High Carbon Ferromanganese From A Manganese Ore Located In Erzincan." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612604/index.pdf.

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Main purpose of this study was to investigate the production of high carbon ferromanganese by smelting a manganese ore located in Erzincan. Time, charge basicity, fluorspar addition and coke to ore weight ratio were used as experimental variables. After characterization of the ore, a mixture of 100 grams of uncalcined manganese ore and carefully weighed amounts of coke powder, lime, fluorspar and scrap iron were put into a conical graphite crucible. The graphite crucible with its contents was covered with a graphite lid and placed in an electronically controlled muffle furnace. The furnace was

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13

Rusen, Aydin. "Usage Of Boron Compounds In Copper Production." Phd thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615560/index.pdf.

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Copper losses to slag are generally between 0.7-2.3% during the copper matte smelting stage. In this study, the aim was to reduce these losses in the slag phase. For this purpose, usage of some additives (especially calcined colemanite labeled as CC, boric oxide-B2O3 and calcium oxide-CaO as well) as flux material was investigated. The flash furnace matte-slag (FFM-FFS) obtained from Eti Copper Inc. and a master matte-slag (MM-MS) produced synthetically were used as starting materials. Additives were tested in various amounts under two different atmospheres (N2 and low Po2 obtained by mixture

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14

Stenman, Johan. "Pretreatment Methods for Manganese Containing Anode Sludge." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65751.

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This master thesis work examines whether it is possible to separate lead from an electrolytic sludge rich in manganese using pyrometallurgical treatment, and also attempts to determine the optimum process parameters for such a treatment. It also includes a theoretical study of the possible applications for lead and manganese, as well as thermodynamic calculations predicting the behaviour of the material at increasing temperatures. The experimental work completed includes characterisation and agglomeration of the raw material, as well as tests in a chamber furnace and a rotary furnace. The anod

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15

Fosu, Allen Yushark. "Development of a Chloride Route for Lithium Extraction from Spodumene." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0094.

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Le lithium est un composant majeur des batteries Li-ion, utilisées dans la fabrication de nombreux appareils électroniques portables. La transition énergétique entraîne le passage des véhicules thermiques aux véhicules électriques et hybrides, qui repose principalement sur l'utilisation de batteries Li-ion pour le stockage réversible de l'énergie. Le développement des véhicules électriques basés sur la technologie lithium-ion est à l'origine d'une demande record de sel de lithium (principalement carbonate et hydroxyde de lithium). Le spodumène est la principale source de lithium à partir de mi

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16

Mtotywa, Busisiwe Percelia, and G. J. Lyman. "A systems engineering approach to metallurgical accounting of integrated smelter complexes." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/4846.

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Thesis (PhD)--Stellenbosch University, 2008.<br>ENGLISH ABSTRACT: The growing need to improve accounting accuracy, precision and to standardise generally accepted measurement methods in the mining and processing industries has led to the joining of a number of organisations under the AMIRA International umbrella, with the purpose of fulfilling these objectives. As part of this venture, Anglo Platinum undertook a project on the material balancing around its largest smelter, the Waterval Smelter. The primary objective of the project was to perform a statistical material balance around the

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17

Mesa, Perez Juan Miguel. "Testes em uma planta de pirolise rapida de biomassa em leito fluidizado : criterios para sua otimização." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257207.

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Orientador: Luis Augusto Barbosa Cortez<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agricola<br>Made available in DSpace on 2018-08-05T15:58:35Z (GMT). No. of bitstreams: 1 MesaPerez_JuanMiguel_D.pdf: 6859619 bytes, checksum: c3322e7576316c3eb38397a94e624ce4 (MD5) Previous issue date: 2004<br>Resumo: Neste trabalho são apresentados e discutidos testes experimentais conduzidos na planta de pirólise rápida de biomassa da Unicamp visando à operação estável do reator de leito fluidizado em regime borbulhante. Esses resultados permitiram identificar os princip

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18

Du, Preez Rudolph C. "Effect of lime additions and bulk chromium content on chromium deportment in smelter matte-slag systems." Thesis, Stellenbosch : Stellenbosch University, 2010. http://hdl.handle.net/10019.1/17459.

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Thesis (MScEng) –Stellenbosch University, 2010<br>ENGLISH ABSTRACT: More mining houses are turning their attention to the processing of ore mined from the UG2 reef. This is mainly due to the depletion of the Merensky reef or the low availability of ore from the Platreef. With the higher UG2 ore concentration in the process feed, companies experience more problems with the processing of the ore due to its high chrome content. Although there are various possible solutions to the problems experienced in the processing of UG2 ore, very little of thise solutions are actually implemented in th

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19

Dumay, Christophe. "Étude de l'affinage oxydant du silicium métallurgique et des ferrosiliciums." Grenoble INPG, 1995. http://www.theses.fr/1995INPG0117.

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Le silicium metallurgique et les ferrosiliciums elabores par voie pyrometallurgique doivent, pour certaines applications, subir un traitement d'affinage visant a en reduire la teneur en aluminium et en calcium. Un tel traitement peut etre effectue par le biais d'une oxydation des alliages liquides (procede tinject chez pechiney-electrometallurgie par exemple). L'objectif de ce travail est de preciser la description physico-chimique et thermodynamique de cet affinage par la mesure et l'analyse de plusieurs de ses parametres fondamentaux. Nous avons tout d'abord mesure par la methode de la goutt

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20

Sauvanaud, Jean. "Le condenseur du haut fourneau à zinc : sondages de températures, connaissance du fonctionnement, application à la modélisation et au suivi." Châtenay-Malabry, Ecole centrale de Paris, 1996. http://www.theses.fr/1996ECAP0700.

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Dans le procédé Impérial Smelting, le condenseur a pour tache de récupérer le zinc à partir du gaz délivré par le haut fourneau à zinc. Pour améliorer les performances du condenseur, une étude de fond a été entreprise, consistant en : - l'établissement des bases théoriques du réacteur, et de diagrammes les illustrant ; - la réalisation d'une campagne industrielle de mesures, incluant des mesures de températures à l'intérieur du condenseur ; - l'établissement d'un modèle physico-chimique du réacteur, permettant de dégager les paramètres-clés commandant la captation du zinc.

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21

Neira, John Bernardo Vilca. "Estudo da recuperação de metais contidos no resíduo niquelífero do processo Caron." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-28032017-092407/.

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O resíduo niquelífero, objeto deste estudo, foi gerado pelo processo de extração piro-hidrometalúrgico, constituindo um problema para sua destinação. Este trabalho pretende contribuir com os conhecimentos sobre o processo de recuperação de metais de interesse por redução carbotérmica na forma de pelotas auto-redutoras. O estudo envolveu a caracterização das matérias-primas, mostrando que 75 a 80% de níquel encontra-se na forma de silicatos de magnésio e de ferro, e que a concentração física do resíduo não é possível. O trabalho apresenta os fundamentos da redução carbotérmica e uma revisão dos

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22

Chang, Hui-chu, and 張蕙朱. "Evaluating the reproduction efficiency of Ag-Au-Pd alloy wires by pyrometallurgy." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/puyu8a.

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碩士<br>國立中山大學<br>環境工程研究所<br>103<br>According to a report released by the United Nation Environment Programme (UNEP) in 2013, the growth in demand for metals is expected to increase by almost ten times in the future, suggesting a need to rethink of recycling practices in order to address the future market and possible negative environmental impacts. New approaches that target specific components in a product are required to consider the complexity as the life of the product ends, in order to design appropriate methods to separate and recover the components of interest. The concept of such a prod

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23

(9464987), Paul Mather. "An Exergetic Comparison of Copper Extraction from Chalcopyrite Concentrates by Pyrometallurgy and Hydrometallurgy." Thesis, 2020.

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Copper is an essential metal in today’s economy, due to its superior electrical and thermal conductivities, alloying properties, and chemical uses. Most copper is produced viamining and refining, and most copper is found in the earth’s crust as chalcopyrite, CuFeS2. Typically, chalcopyrite is concentrated and fed to a high temperature pyrometallurgical process which produces >99.99% purity copper cathodes. Recently, Freeport-McMoRan Inc. has implemented a hydrometallurgical autoclave-leaching process that takes chalcopyrite concentrate and produces coppe

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24

Kitungwa, Kabezya. "Study of dispersion phenomenon in Creusot Loire Uddeholm reactor." Thesis, 2009. http://hdl.handle.net/10539/6860.

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A study on the slag dispersion in bath smelting converter was undertaken. The aim was mainly to investigate the behaviour of the dispersed slag phase at high gas flow rate and low slag volume (10%) systems. For simulations purposes, water; paraffinoil and air were used in a one fifth model of the commercial 100 ton Creusot-Loire- Uddeholm converter to represent bulk steel, molten slag and gas respectively. Emulsion samples were collected by means of the specially made syringe. The experimental results revealed that the dispersed slag phase decreased with the vertical distance from the o

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25

Ross, Edwin Harm. "Measurement by use of the rotating cylinder technique of the rate of the solution of Winterveld chromite ore in slag." Thesis, 2015. http://hdl.handle.net/10539/19232.

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26

Cengizler, Hakan. "Thermodynamic activity of MnO in manganese slags and slag-metal equilibria." Thesis, 2015. http://hdl.handle.net/10539/16928.

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27

Sekhukhune, Lehlogonolo Mokgadi. "Acidified ferric chloride leaching behaviour of a complex Ni – Cu matte at atmospheric pressure." Thesis, 2013. http://hdl.handle.net/10210/8303.

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28

Pandher, Rajan. "Sulphation and Sulphate Decomposition in Roasted Nickel Concentrates." Thesis, 2010. http://hdl.handle.net/1807/24615.

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The sulphation and sulphate decomposition occurring during the oxidation of nickel concentrates were studied by thermal analysis. Samples of industrial nickel concentrates were heated in inert gas to temperatures between 400°C and 850°C and oxidized isothermally in air or in a 4%O2-96%N2 mixture. During isothermal oxidation of the concentrates, SO2 evolved from the roasting reactions led to partial formation of metal sulphates. Following the oxidation and sulphation of the sample, the decomposition of the formed sulphates was studied. This was completed either by heating the sulphated samp

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29

Mosia, Mmankaeya Elsie. "Treatment of process water at Dense Media Separation (DMS) Powders Industry using selected membrane processes." Thesis, 2015. http://hdl.handle.net/10352/343.

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M. Tech., (Faculty of Applied and Computer Science), Vaal University of Technology<br>There is huge concern in the mining and industries to manage wastewater prior to discharge into the environment. It is generally cheaper and cost reducing for industries to treat its own wastewater before discharging to the local authority sewer. Dense Media Separation (DMS) Powders Company produces milled and atoms ferro-silicon by pyro-metallurgical process. DMS Powders uses municipal water for all processes taking place in the plants. The water used during the processes of milled and atom ferrosilicon powd

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30

Matjie, Ratale Henry. "Sintering and slagging of mineral matter in South African coals during the coal gasification process." Thesis, 2008. http://upetd.up.ac.za/thesis/available/etd-11112008-125913.

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