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Dissertations / Theses on the topic 'Ferrous Metallurgy'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Strandkvist, Ida. "A Dissolution Study of Common Ferrous Slag Minerals." Licentiate thesis, Luleå tekniska universitet, Mineralteknik och metallurgi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60227.

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Slag is a vital part of metal production since it removes impurities from the metal. As slag is continuously produced, the options are either to dispose slag in landfill or acknowledge slag as a product. Slag can be used in many different applications, ranging from fertilizer to construction material; in some cases, the properties of slag make it a superior alternative to virgin stone materials. The properties and thereby the field of application is determined by the mineralogical composition of the slag. Slag is considered an environmentally friendly material as long as the leaching of certai

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2

Boguslavsky, D. R., and L. P. Sharavara. "Integral evaluation of the professional risks for the employees of the ferrous metallurgy enterprise." Thesis, Sumy state university, 2017. http://essuir.sumdu.edu.ua/handle/123456789/54160.

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The magnitude of the occupational risk can be judged by the integral index that integrates its frequency and difficulty in the same numerical value. The purpose and objectives of the study: The evaluation of the occupational risks for the employees of the ferrous metallurgy enterprises by the indicators of the integral index of the occupational risk (Ir).

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3

Daenzer, Renaud. "Investigating the role of ferrous iron in the arsenic(V)-iron(II, III) coprecipitation process system." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103615.

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In this thesis, the effects of iron(II) on arsenic(V) removal from acidic sulphate solutions in lime neutralization systems were investigated. The role of Fe(II) was analyzed via different types of experiments. Firstly, 2-stage continuous coprecipitation (CCPTN) circuit experiments were run, involving variable Fe(II)/Fe(III) fractions whilst maintaining an Fe(tot)/As(V) molar ratio of 4, and the resultant products were subjected to stability testing. It was found that CCPTN results were reproducible; that increasing the Fe(II) content resulted in somewhat lower initial arsenic(V) removal, but

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4

Smith, Graham T. "The secondary machining of Fe-Cu-C ferrous powder metallurgy compacts by turning, boring and drilling." Thesis, University of Birmingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395323.

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5

Rhodes, Nigel Anthony. "The growth, structure and properties of sinter-necks in mixed ferrous powder systems." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263406.

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6

Nicholas, Matthew. "Metallurgy in the gloaming : non-ferrous metalwork from three early Anglo-Saxon cemeteries at RAF Lakenheath, Suffolk." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/91120/.

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In the late 1990s Suffolk County Council Archaeology Service (now Suffolk Archaeology) began a series of excavations in advance of construction work at the US Air Force base RAF Lakenheath (Eriswell, Suffolk). During the course of this work three substantial Early Anglo-Saxon cemeteries (dated from 475 to 650 CE) were excavated. These sites are some of the largest and best preserved Anglo-Saxon cemeteries excavated in modern times. Many of the inhumations were furnished. Amongst the host of grave goods were approximately 800 non-ferrous metal objects. This presented a significant opportunity t

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7

Black, Sean C. E. "The effect of abrasive properties on the surface integrity of ground ferrous materials." Thesis, Liverpool John Moores University, 1996. http://researchonline.ljmu.ac.uk/5100/.

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The effect of the thermal properties of alumina and CBN abrasives on workpiece temperatures in grinding was investigated. A review of the literature revealed a lack of knowledge of the thermal properties of CBN limiting the accuracy of theoretical predictions of the heat conduction in CBN grinding. A grain contact analysis was developed to predict the energy partitioning between the workpiece and wheel. The analysis takes into account two dimensional transient heat transfer in the grain and maintains temperature compatibility at the grain wear flatworkpiece interface. The proportion of the tot

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8

Chandraprabha, M. N. "Studies On Bio-Oxidation A Refractory Gold Containing Sulphidic Concentrate With Respect To Optimization And Modeling." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/188.

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Although bacterial leaching of sulphidic minerals is a well-known phenomenon, it is only in the last ten years that full-scale bacterial leaching plants have been commissioned for gold processing. In order for bacterial leaching to compete successfully with other pretreatment processes for refractory ores, particularly with established technologies such as roasting and pressure leaching, it needs to be efficient. This requires the optimization of the parameters affecting the leaching reaction and the growth of bacteria. The entire biotreatment process is agitation leaching, carried out in

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9

Chandraprabha, M. N. "Studies On Bio-Oxidation A Refractory Gold Containing Sulphidic Concentrate With Respect To Optimization And Modeling." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/188.

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Although bacterial leaching of sulphidic minerals is a well-known phenomenon, it is only in the last ten years that full-scale bacterial leaching plants have been commissioned for gold processing. In order for bacterial leaching to compete successfully with other pretreatment processes for refractory ores, particularly with established technologies such as roasting and pressure leaching, it needs to be efficient. This requires the optimization of the parameters affecting the leaching reaction and the growth of bacteria. The entire biotreatment process is agitation leaching, carried out in st

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10

Souza, Fabrício Mendes. "Estudo da microestrutura, da textura cristalográfica e da recristalização em chapas obtidas por lingotamento contínuo e semicontínuo da liga de alumínio AA4006." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-07052012-121639/.

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A liga de alumínio designada AA4006 é muito utilizada na indústria. É uma liga do sistema Al-Fe-Si, com teores (% em massa) de Si na faixa de 0,8 a 1,2% e Fe entre 0,5 e 0,8%. Apesar de ser bastante utilizada, ela foi pouco estudada. Neste trabalho foi realizado um estudo comparativo da microestrutura e da textura cristalográfica entre chapas da liga AA4006 produzidas por dois processos industriais de lingotamento: contínuo (Twin roll caster TRC) e semicontínuo (Direct chill DC). Para a caracterização microestrutural, foram utilizadas as técnicas de microscopia óptica com luz polarizada, micro

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11

Головко, И., та I. Golovko. "Планирование производства на предприятиях по глубокой переработке цветных металлов : магистерская диссертация". Master's thesis, б. и, 2020. http://hdl.handle.net/10995/86561.

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The main problem of production planning at the enterprise for the processing of non-ferrous metals is a large range of alloys with limited smelting and casting capacities. In this case, it is necessary to connect the cast alloys with the rest of the production in order to balance the capacities of the processing units for rhythmic, uninterrupted and coordinated work. From the validity and accuracy of intra-workshop planning, timeliness, breadth, completeness and reliability of accounting at the enterprise directly depends on the effectiveness and efficiency of its activities in general. Since

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12

Полуяхтов, С. Б., та S. B. Poluyakhtov. "Совершенствование управления технологическими инновациями на предприятиях по глубокой переработке цветных металлов : магистерская диссертация". Master's thesis, б. и, 2020. http://hdl.handle.net/10995/86607.

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The process of creating technological innovations in enterprises for the processing of non-ferrous metals is characterized by high complexity and complexity, which stems from the large number of functional units involved, as well as the need to balance the interests of individual functional units with client requirements and achieve an acceptable level of economic efficiency for the enterprise. Therefore, the development of a set of issues dedicated to the management of technological innovation is an important and urgent task. The main idea of the study is that the existing system of organizin

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13

Зырянов, К. Ю., та K. Y. Zyryanov. "Проектное управление модернизацией производственной системы на металлургических предприятиях в концепции бережливого производства : магистерская диссертация". Master's thesis, б. и, 2020. http://hdl.handle.net/10995/86572.

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The developed methodology for the modernization of the enterprise’s production system, based on a step-by-step method of managing production processes (6 sigma), the concept of lean manufacturing and statistical data analysis, can be used in projects to modernize the production systems of metallurgical enterprises, increasing their efficiency and competitiveness by: rational use of resources; increase labor productivity; staff involvement. The developed project for the modernization of the enterprise’s production system can be “replicated” at metallurgical enterprises, allowing them to reduce

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14

Рычкова, А. А., та A. A. Rychkova. "Экономическое обоснование инвестиционной политики предприятий цветной металлургии в условиях «Индустрии 4.0» : магистерская диссертация". Master's thesis, б. и, 2020. http://hdl.handle.net/10995/86614.

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In modern conditions, the effective development of industrial enterprises is complicated by the low organizational and technical level of production, high costs and insufficient financial resources, which requires the active attraction of investment funds. The purpose of the master's thesis is to develop a methodological approach to the formation of the investment policy of a non-ferrous metallurgy enterprise within the framework of Industry 4.0. The research considers the concept of the investment policy of the enterprise and the correlation of the investment activity of the enterprise with t

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15

Пяткова, В. И., та V. I. Pyatkova. "Ресурсное обеспечение малых промышленных предприятий ломом цветных металлов : магистерская диссертация". Master's thesis, б. и, 2021. http://hdl.handle.net/10995/97928.

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Современные условия хозяйственной деятельности, ее динамика делают рационализацию процессов материально-технического обеспечения одним из основных конкурентных преимуществ хозяйствующих субъектов. Данное положение особенно актуально для материалоемких малых предприятий занятых в цветной металлургии. Целью магистерской диссертации является разработка методики обеспечения малых промышленных предприятий ломом цветных металлов. В работе анализируются основные производственные особенности малых промышленных предприятий в разрезе этапов ресурсного обеспечения предприятий, даются рекомендация по опти

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16

Flament, Julien. "Les métallurgies associées de la fin du XIIIe siècle au XVe siècle : L’argent, les cuivres et le plomb à Castel-Minier (Ariège, France)." Electronic Thesis or Diss., Orléans, 2017. http://www.theses.fr/2017ORLE1175.

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Les Pyrénées centrales font l’objet, depuis plusieurs décennies, de recherches pluridisciplinaires consacrées aux exploitations minières et métallurgiques médiévales. Dans l’ancienne vicomté de Couserans, les fouilles archéologiques ont permis de mettre au jour le site de Castel-Minier qui s’avère être un témoin majeur des activités d’extraction des minerais et des métaux entre la fin du XIIIe siècle et le XVe siècle. Le mobilier archéologique révèle la vocation polymétallique de l’atelier qui se caractérise par la pratique de plusieurs métallurgies qui concernent l’argent, le cuivre et ses al

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17

Filho, Edson Souza de Jesus. ""PROCESSAMENTO, USINAGEM E DESGASTE DE LIGAS SINTERIZADAS PARA APLICAÇÕES AUTOMOTIVAS"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-28062007-123420/.

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O objetivo deste trabalho foi desenvolver potenciais materiais para aplicações automotivas, em particular como insertos para assento de válvula em motores de combustão interna à gasolina. O desenvolvimento compreendeu as etapas de processamento dos materiais via metalurgia do pó, tratamento térmico, caracterização microestrutural e mecânica, usinagem e desgaste dos mesmos. O desenvolvimento objetivou principalmente a redução de custo e a aplicação de elementos menos poluentes, excluindo-se, por exemplo, a aplicação do Co devido ao seu alto custo e do Pb devido aos seus efeitos toxicológicos e

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18

Müller, Petr. "Biodegradabilní kostní implantáty na bázi železa." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220967.

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The present work deals with the comparison of the properties of metallic biomaterials in terms of their suitability for use as a temporary metal implant. In the work is judged biocompatibility of materials, they are comparing the corrosion rates and the influence of additives in the iron alloy to change biocompatibility and corrosion rate. In a part of this work is suggesting a method of preparing biodegradable metallic samples with different alloying elements and determine the methods, processes and measuring the corrosion rates. Part of this work is the chapter dealing with the function and

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19

Chen, Shengqi. "Phase equilibria in MgO-containing ferro-nickel smelting slags /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18402.pdf.

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20

Alves, Luis Carlos Praxedes. "DeterminaÃÃo por Espectroscopia MÃssbauer dos SÃtios de Ferro em MatÃrias Primas GeopolimÃricas." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=6232.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>Neste trabalho, foram estudadas por espectroscopia MÃssbauer matÃrias primas de geopolÃmeros. Para motivar o trabalho sÃo apresentados resultados de espectroscopia MÃssbauer de um solo e uma concreÃÃo laterÃtica e os respectivos geopolÃmeros produzidos a partir deles. Para estudar a estrutura do ferro nas caulinitas e metacaulinitas, principais matÃrias primas geopolimÃricas, foram estudadas caulins vermelhos naturais com ocorrÃncia natural de ferro em sua estrutura e caulinitas brancas dopadas com ferro atravÃs de reaÃÃes de inc

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21

Komata, Renata. "Estudo do efeito da densidade nas propriedades de um material ferroso com gradiente de função." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-19092018-080832/.

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Existem diversos componentes produzidos por metalurgia do pó que necessitam utilizar uma matéria prima nobre devido a aplicações que causam desgaste em áreas específicas. Desta forma faz-se necessário o desenvolvimento de um material tornando o projeto mais atraente economicamente. O objetivo deste trabalho é analisar e discutir o efeito da densidade nas propriedades mecânicas e microestruturais de materiais com gradiente de função, compostos por metade de ferro comercialmente puro e a outra metade de um material mais nobre, que contém elementos de liga específicos para tratamento de sinterhar

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22

Mabusela, Bongolwethu Professor. "The effect of initial pH on surface properties of ferric ion precipitates formed during microbial oxidation of ferrous ion by Leptospirillum ferriphilum in a CSTR." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2553.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2017.<br>While bioleaching is a proven technology for the efficient recovery of base metals from sulphide minerals, its sustenance is dependent on the continuous availability of ferric ion, Fe3+, in soluble form, in the bioleach liquor. However, the solubility of ferric ion is low at higher pH that it tends to precipitate, resulting in the formation of ferric ion precipitates. The formation of ferric ion precipitates in bio-hydrometallurgy decreases the leaching efficiency by trapping the leached metals in solution

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23

Iasi, Marcelo Mantovani. "Estudo do efeito de parâmetros de sinterização nas propriedades de um material ferroso com gradiente de função." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-09042018-105102/.

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Nesta dissertação, foram estudados materiais com gradiente de função produzidos por metalurgia do pó a fim de se encontrar uma alternativa com redução de custo para aplicações na indústria automobilística. Os corpos de prova produzidos com ferro comercialmente puro e materiais ligados foram ensaiados de maneira a entender o efeito da interface no componente a ser produzido. Foram estudadas as propriedades de ruptura transversal, resistência à tração, macro e microdureza, além da microestrutura por microscopia ótica e microscopia eletrônica de varredura. Foi possível verificar que é uma alterna

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CALICCHIO, LEONARDO. "Efeito do 'Shot peening' sobre a nitretacao de pecas de ferro produzidos por metalurgia do po." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9428.

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Made available in DSpace on 2014-10-09T12:26:43Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:06:14Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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Rosa, Sílvia do Nascimento 1980. "Influencia do teor de titanio no torneamento do ferro fundido vermicular." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263052.

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Orientador: Anselmo Eduardo Diniz<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-14T09:54:08Z (GMT). No. of bitstreams: 1 Rosa_SilviadoNascimento_M.pdf: 9148933 bytes, checksum: ed1d0dab6ab664906da6aa500c2a2c94 (MD5) Previous issue date: 2009<br>Resumo: O ferro fundido vermicular, sigla inglesa CGI (Compacted Graphite Iron), devido às suas boas propriedades mecânicas, tem encontrado diversas aplicações na área automobilística. Uma das aplicações é a produção de blocos de motores diesel de alta potência, q

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NEVES, MAURICIO D. M. das. "Sinterização de misturas de pós de ligas de ferro para aplicações automotivas." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11376.

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Gabaldo, Sander. "Uma contribuição a melhoria do processo de fresamento de ferro fundido vermicular - CGI." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264179.

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Orientador: Anselmo Eduardo Diniz<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-14T07:22:42Z (GMT). No. of bitstreams: 1 Gabaldo_Sander.pdf: 2762986 bytes, checksum: 9ee0f13e912c0dd2e61765aecf7ca689 (MD5) Previous issue date: 2009<br>Resumo: Desde o início deste século, cada vez mais têm se intensificado as pesquisas no desenvolvimento dos motores diesel, procurando aumentar a sua eficiência energética e reduzir os níveis de emissão de poluentes. Uma das maneiras de aumentar esta eficiência é aumentar os

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Weschenfelder, Franciele. "Eletrodos porosos obtidos através de metalurgia do pó para aplicação em baterias." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/103717.

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Este trabalho teve por objetivo o estudo das propriedades de eletrodos da bateria de Edison (ferro-níquel) obtidos por metalurgia do pó para melhoria das propriedades deste tipo de bateria. A metalurgia do pó possui a vantagem de ser um processo de com alto aproveitamento de matéria prima e possibilitar a obtenção de peças porosas, ideais para eletrodos de baterias. Pesquisar processos de fabricação distintos para sistemas de armazenamento de energia torna-se fundamental num momento de crescimento da demanda energética mundial. Para desenvolvimento das atividades empregou-se pó de ferro e de n

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Calicchio, Leonardo. "Efeito do \'shot peening\' sobre a nitretação de peças de ferro produzidas por metalurgia do pó." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-22092011-101543/.

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Atualmente, quando se tem a necessidade de nitretar peças produzidas pela metalurgia do pó, usa-se a nitretação a plasma. Apesar de ser um processo de alto custo, com diversas dificuldades operacionais e de ajuste de processo, a nitretação a plasma é o único processo viável para nitretar esses materiais por ter uma ação apenas superficial, não apresentando ação nitretante no interior dos poros. Nos processos de nitretação a gás e banho de sais, o meio nitretante penetra na porosidade (interconectada) dos materiais sinterizados, havendo assim a formação de camada branca em uma grande profundida

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Farina, Alexandre Bellegard. "Efeito do teor de ferro e do tratamento térmico na microestrutura e propriedades da liga UNS N06625." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-29122014-184030/.

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Nos últimos anos, a indústria de O&G tem enfrentado um considerável desafio no que tange a obtenção de materiais que associem elevada resistência à corrosão às propriedades mecânicas para exploração dos poços das bacias do Pré-Sal. Estes poços apresentam elevadas concentrações de CO2, H2S e cloretos de forma que a resistência à corrosão é uma necessidade. De outro lado, as elevadas profundidades de exploração acopladas com a necessária produtividade têm indicado que a pressão de trabalho destes materiais tende a aumentar. O desafio atualmente reside na obtenção de materiais para fabricação de

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Borba, Monir Goethel. "Desenvolvimento de uma máquina síncrona trifásica com núcleo do rotor produzido a partir da metalurgia do pó e ímãsde neodímio-ferro-boro para aplicação em aerogeradores." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/180119.

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Este trabalho tem como objetivo o projeto, construção e análise do funcionamento de uma máquina elétrica síncrona trifásica com núcleo do rotor produzido a partir da metalurgia do pó e ímãs de neodímio-ferro-boro para aplicação em aerogeradores. Tomando como base a máquina elétrica modelo VTOP da fabricante Grupo Voges, foram realizadas mudanças na forma construtiva dos núcleos do estator e do rotor. O pacote chapas que compõem o núcleo do estator foi montado de maneira que as ranhuras apresentem um ângulo de inclinação de 10º ao longo de toda a extensão da máquina. Para o rotor, foi projetado

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Fontes, Marcos Alves. "Caracterização das camadas formadas pela nitretação a plasma de ferro sinterizado." Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/872.

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Made available in DSpace on 2016-06-02T19:12:21Z (GMT). No. of bitstreams: 1 4512.pdf: 12085865 bytes, checksum: 9c98b7edb2a0238a143b2c8e9469a515 (MD5) Previous issue date: 2012-03-06<br>Ion nitriding is a process of thermo-physical-chemical treatment that provides a surface hardening, originated by interstitial diffusion of nitrogen on the ferrous and nonferrous alloys surfaces. Understanding and controlling the formation of the nitrided layer have considerable industrial interest due to the improvements regarding wear, corrosion and fatigue resistances on the metals and their alloys. In th

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Rodrigues, Neto Anfrísio 1966. "O reino, os agricultores e as matas = história ambiental e siderurgia em São João de Ipanema no Século XIX." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287130.

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Orientador: Pedro Wagner Gonçalves<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociências<br>Made available in DSpace on 2018-08-18T17:40:51Z (GMT). No. of bitstreams: 1 RodriguesNeto_Anfrisio_M.pdf: 16512583 bytes, checksum: ab9ce169a14538fb39309ffc2574d6d9 (MD5) Previous issue date: 2011<br>Resumo: A pesquisa procura mostrar as relações dos moradores da região do Morro de Araçoiaba e a construção da Real Fábrica de Ferro de São João de Ipanema no início do século XIX. O uso dos recursos naturais pela fábrica, como o minério de ferro (magnetita), as árvores

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Teixeira, Gerson Paz. "Desenvolvimento de uma máquina síncrona trifásica com ímãs de Nd-Fe-B e núcleo do rotor a partir de ferro sinterizado para aplicação em aerogeradores de 7,5 kW." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/172055.

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Desenvolvimento de uma máquina síncrona trifásica com ímãs de Nd-Fe-B e núcleo do rotor a partir de ferro sinterizado para aplicação em aerogeradores de 7,5 kW, verificando a viabilidade do protótipo. Partindo de um projeto anteriormente desenvolvido, foi realizada alteração no ângulo das chapas do estator em 10º, com o intuito de minimizar o efeito de correntes parasitas, sendo esse um dos fatores que influenciam os resultados. Para avaliação de desempenho, foi utilizada uma bancada de testes composta de analisador de energia, sensor de torque e instrumentos de medição, sendo o acionamento do

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Motta, Clayton André Oliveira da. "Verificação da adição de cinza leve no composto ferro-cobre-grafite para fabricação de anéis de selos mecânicos pelo processo de metalurgia do pó convencional." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/101173.

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O presente trabalho possui como objetivo analisar as propriedades do composto que apresenta em sua composição Fe-Cu-C com adição da cinza leve em percentuais de 4,8% classificado como composto A; 9,8% classificado como composto B; e 14.8% classificado como composto C, processados por metalurgia do pó convencional. Outro objetivo foi analisar o percentual desses compostos e compará-los a liga Fe-Cu-C, classificado como composto Sem Cinza (SC), que não apresenta cinza em sua composição. O composto que não apresenta cinza é utilizado na fabricação de anéis de selos mecânicos. Buscou-se nesse trab

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Thiesen, Geraldo Tadeu da Silva. "Influência da cinza pesada e do pó de ferro em compósitos sinterizados obtidos por metalurgia do pó e aplicados como meio de suporte em filtro biológico percolador." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/179417.

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Com a crescente ideia de sustentabilidade, surge a necessidade de utilização de recursos renováveis e reaproveitamento de resíduos gerados em processos industriais. Neste trabalho foi avaliada a utilização da cinza pesada oriunda da queima do carvão em usinas termoelétricas no desenvolvimento de um Cermet. O compósito Cinza-Ferro (Cz-10Fe) foi obtido por metalurgia do pó e é composto de cinza pesada moída com adição de 10% em massa de pó de ferro puro. A adição do ferro é justificada para melhoria das propriedades mecânicas do material cerâmico. O compósito foi aplicado como meio suporte para

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Bourgeois, David. "La mine, un fait urbain ? : traces du capitalisme médiéval dans le Rhin supérieur (XIVe-XVe siècles)." Electronic Thesis or Diss., Mulhouse, 2024. http://www.theses.fr/2024MULH8915.

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Le développement de l’exploitation des mines de métaux polymétalliques non-ferreux dans la partie méridionale du massif des Vosges, à partir du XIVe siècle a considérablement transformé l’économie du Rhin supérieur. La fin de l’époque médiévale, au cours de la seconde moitié du XVe siècle voit l’accélération de ce mouvement sous l’impulsion des forces économiques du Rhin supérieur. Les marchands bâlois comptent parmi les principaux protagonistes de cet élan qui voit les puits de mines s’ouvrir des territoires Habsbourg vers le Comté de Bourgogne. Cet épisode minier est l’occasion de mettre en

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Tomczyk, Céline. "De l’exploitation des minerais non ferreux aux productions métalliques de la fin du Néolithique au 1er âge du Fer en Europe : formation et caractérisation des réseaux d’échange." Electronic Thesis or Diss., Paris 1, 2024. http://www.theses.fr/2024PA01H030.

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Définir la provenance d’un objet est une question centrale dans l’étude des interactions entre les sociétés humaines du passé. Il est toutefois très complexe de tracer des échanges à l’échelle de l’Europe en particulier à l’âge du Bronze. Nous argumentons que la détermination de provenance d’objets métalliques doit être appuyée par une meilleure connaissance des zones de production minière et de leurs minéralisations. Peu de données étant disponibles pour les productions d’étain, de plomb-argent et d’or, notre étude porte principalement sur le cuivre. Nous avons mis en évidence un changement d

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Bouvier, Odile de. "Corrosion et passivation des fontes amorphes en milieu cimentaire." Grenoble INPG, 1990. http://www.theses.fr/1990INPG0004.

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Les fibres de fonte, alliages amorphes industriels utilises comme fibres de renforcement des betons, sont naturellement recouverts d'une couche protectrice epaisse (10 nm a 50 nm); cette couche superficielle analysee par esca, sims, sdl, est constituee d'oxydes de fer et de chrome(iii) et, en moindre quantite, de silicium. En solution decimale de soude, cette couche est remplacee par un film de passivation (5 nm) constitue d'oxydes de fer et de chrome(iii) et contenant du phosphore lie au sodium. La cinetique globale de formation du film passif, etudiee par voltamperometrie a balayage lineaire

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Pinto, Samuel Santos de Souza. "Caracterização das propriedades físicas e mecânicas de diferentes tipos de rejeito para aplicação em pavimentos." Universidade Federal de Viçosa, 2013. http://locus.ufv.br/handle/123456789/3831.

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Made available in DSpace on 2015-03-26T13:28:33Z (GMT). No. of bitstreams: 1 texto completo.pdf: 4018410 bytes, checksum: feed045553b762ef8c1ac9447d0f42b0 (MD5) Previous issue date: 2013-03-21<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This research work was aimed towards the geotechnical characterization of samples from iron ore rejects coming from flotation and magnetic separation processes, together with the addition of LD steel slag, in order to use these materials as components for base of paved roads. In order to reach such goal, this research work was also conce

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Cunha, Fernando de Jesus. "Caraterização de Pó de Despoeiramento da Fabricação de Ligas de Manganês e Avaliação de seu Potencial Agronômico." Universidade Federal de Viçosa, 2007. http://locus.ufv.br/handle/123456789/5537.

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Made available in DSpace on 2015-03-26T13:53:35Z (GMT). No. of bitstreams: 1 texto completo.pdf: 2372218 bytes, checksum: c684476e0801238a67fe879e90544505 (MD5) Previous issue date: 2007-08-27<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The dusty from the siderurgical industry (PD) it is an industrial solid residue originating from the processes of the metallurgy of the ore of manganese (Mn). This material contains significant concentration of Mn. The responsible industrial unit for the production of approximately 2000 ton/month of PD's is Rio Doce Manganês (RDM), compa

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Nikis, Nicolas. "Archéologie des métallurgies anciennes du cuivre dans le bassin du Niari, République du Congo." Doctoral thesis, Universite Libre de Bruxelles, 2018. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/276494.

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Le cuivre occupe une place importante en Afrique centrale tout au long du second millénaire, notamment dans les échanges. Les gisements du bassin du Niari au sud de la République du Congo, mentionnés dès le 16e siècle dans les sources européennes, ont ainsi joué un rôle économique d’envergure. Ils auraient contribué au développement de plusieurs entités politiques de la zone dont, notamment, le royaume Kongo.Les données directes sur la métallurgie primaire du cuivre dans cette zone restaient cependant limitées à cause du laconisme des sources historiques et de l’insuffisance des données archéo

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Ponsot, Inès. "Glasses and Glass-Ceramic Components from Inorganic Waste and Novel Processing." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424636.

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Thanks to European environmental rules and regulations establishment, waste recycling has become a more and more relevant problematic. For manufacturing plants, especially those producing hazardous wastes, expenses linked to waste production have drastically increased over the last decades. In the proposed work, various hazardous and non-hazardous wastes, among: soda-lime and borosilicate glass cullet, cathode ray tubes glass, exhausted lime from fume abatement systems residues, sludge and slags from ferrous and non-ferrous metallurgy, and pre-stabilized municipal solid waste incinerators ashe

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Yao, Shien-Huei, and 姚舜暉. "The wear resistance of Bronze & Ferrous Powder Metallurgy parts." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/03975450639176024724.

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Sivaprahasam, D. "Studies On Synthesizing Fe And Fe-Cu Nanopowders By Levitational Gas Condensation Process And Their Consolidation Characteristics." Thesis, 2011. https://etd.iisc.ac.in/handle/2005/2438.

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There exist large number of techniques for the preparation of nanostructured materials. Among them the preparation of nanopowders by gas/vapour condensation is a popular one. Because of very high level of surface to volume ratio, powders of metals which may or may not be reactive in the bulk form undergo vigorous oxidation. Oxidation once initiated continues in an auto catalytic fashion leading to a rise in temperature further increasing the oxidation rate. Therefore, the nanopowders are consolidated in situ under high vacuum. Alternatively a thin passivating oxide layer of few nm can be produ

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Sivaprahasam, D. "Studies On Synthesizing Fe And Fe-Cu Nanopowders By Levitational Gas Condensation Process And Their Consolidation Characteristics." Thesis, 2011. http://hdl.handle.net/2005/2438.

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There exist large number of techniques for the preparation of nanostructured materials. Among them the preparation of nanopowders by gas/vapour condensation is a popular one. Because of very high level of surface to volume ratio, powders of metals which may or may not be reactive in the bulk form undergo vigorous oxidation. Oxidation once initiated continues in an auto catalytic fashion leading to a rise in temperature further increasing the oxidation rate. Therefore, the nanopowders are consolidated in situ under high vacuum. Alternatively a thin passivating oxide layer of few nm can be produ

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Sanyal, Prabuddha. "Theoretical Study Of Some Transport And Spectroscopic Phenomena In Two Materials Showing Large Magnetoresistance." Thesis, 2007. https://etd.iisc.ac.in/handle/2005/557.

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In this thesis I present studies of some transport and spectroscopic properties for two di erent materials exhibiting large magnetoresistance. Both of these materials are oxides of transition metals, showing exotic magnetic and transport properties. Despite these similarities, they are very different in many other aspects. One of them is an oxide of Manganese, along with a rare-earth metal, and exhibits large magnetoresistance under certain conditions, when doped by an alkaline earth metal. They are known as doped rare-earth manganites. The other material, Sr2FeMoO6, exhibits large magnetoresi

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Sanyal, Prabuddha. "Theoretical Study Of Some Transport And Spectroscopic Phenomena In Two Materials Showing Large Magnetoresistance." Thesis, 2007. http://hdl.handle.net/2005/557.

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In this thesis I present studies of some transport and spectroscopic properties for two di erent materials exhibiting large magnetoresistance. Both of these materials are oxides of transition metals, showing exotic magnetic and transport properties. Despite these similarities, they are very different in many other aspects. One of them is an oxide of Manganese, along with a rare-earth metal, and exhibits large magnetoresistance under certain conditions, when doped by an alkaline earth metal. They are known as doped rare-earth manganites. The other material, Sr2FeMoO6, exhibits large magnetoresi

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