Aluminium Industry
Mostrando 13-24 de 29 artigos, teses e dissertações.
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13. TRATAMENTO DE REVESTIMENTOS GASTOS DE CUBA ELETROLÍTICA DA INDÚSTRIA DE ALUMÍNIO / TREATMENT OF SPENT POTLINER FROM ALUMINIUM INDUSTRY
Spent Potliner (SPL) is a residue from the primary aluminium production. It is indicated as the major environmental problem in the aluminum industry. SPL is formed by two fractions: Carbonaceous and refractory. According to Brazilian Standards NBR 10004, the SPL is listed as hazardous waste (K088) because it contains high levels of cyanides (complex). The pr
Publicado em: 2007
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14. O fenômeno da reciclagem de lata de alumínio no Brasil : inovação tecnológica, oligopólios e catadores
The objective of this research is to identify the principal processes and actors responsible to make Brasil the world leader of the recycling of aluminium can since 2001. The production of can is characterized by the intensive use of energy, of capital and technology and it is one of the most modern field of industry. The can was made for the first time in t
Publicado em: 2007
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15. Caracterização microestrutural e eletroquímica de revestimentos ambientalmente amigáveis aplicados sobre a liga de Al 2024-T3. / Microestructural and electrochemical characterization of environmentally friendly coatings applied on Al alloy 2024-T3.
The increasing concern with sustainable development, allied with a stronger awareness with environmental preservation, has stimulated researches in order to find environmentally friendly substitutes to replace the efficient hexavalent chromium-based pre-treatment systems (Cr6+) used to protect high-strength aluminium alloys employed in the aircraft industry.
Publicado em: 2007
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16. Productive flexibilizacion and local development: the net of subcontração of the Alunorte / Flexibilização produtiva e desenvolvimento local : a rede de subcontração da Alunorte
This dissertation examines the creation of a network of service companies, subcontracted by Alunorte, as a consequence of the production flexibility process of the alumina industry, located in the industrial sector of the city of Barcarena, State of Pará. The main goal of the present study is to analyze if the relations established between the big industry
Publicado em: 2006
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17. Estudo da influência de tensoativos em sistemas microemulsionados na extração de gálio e alumínio
Gallium is an important material used in the electronic industry whose demand in the world market is increasing in view of its potential applications. A selective technique is required to allow for the production of the metal, separated from aluminium. Due to the fact that microemulsions constitute an attractive alternative to metal extraction procedures, mi
Publicado em: 2005
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18. NONYLPHENOL POLYETHOXYLATE AND TEXTILE WASTEWATER DEGRADATION BY ELECTROCOAGULATION AND FENTON PROCESSES / DEGRADAÇÃO DE NONILFENOL POLIETOXILADO E DE EFLUENTE TÊXTIL POR MEIO DE ELETROCOAGULAÇÃO E PROCESSOS FENTON
Nonylphenol polyethoxylates are nonionic surfactants widely employed on textile industry. Submitted to inadequate effluent treatment processes, these compounds can be eventually biodegraded to metabolites with estrogenic activity. Therefore, efficient processes on increasing the biodegradability or for the removal of these metabolites became necessary. In th
Publicado em: 2004
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19. The application of a mesoscopic scale approach in fretting fatigue
This work concerns the application of a mesoscopic scale fatigue criterion to predict the initiation of cracks in components under fretting conditions. A verification of the analysis is carried out by considering available experimental data for fretting fatigue in a high strength Aluminium alloy commonly used in the aerospace industry. These experiments reve
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-03
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20. Influence of duty factor on the die-sinking Electrical Discharge Machining of high-strength aluminum alloy under rough machining
The use of high-strength aluminium alloys as material for injection molding tools to produce small and medium batches of plastic products as well as prototyping molds is becoming of increasing demand by the tooling industry. These alloys are replacing the traditional use of steel in the cases above because they offer many advantages such as very high thermal
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-07
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21. Identificação modal de uma estrutura aeronáutica via algoritmo de realização de sistemas / Modal identification of an aeronautical structure via the eigensystem realization algorithm
The determination of the dynamic characteristics of aircraft structures has become an extremely important issue in the aerospace industry, primarily due to the continuous demand for lighter and consequently more flexible structures. In this context, most aerospace structural system must be subjected to some form of modal verification prior to flight in order
Publicado em: 2002
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22. Obtenção e caracterização de ligas Ti-Al-Nb para uso em implantes ortopedicos
Metallic materiaIs for total hip prosthesis manufacturing are chosen based on their mechanical strength, fatigue and cOITosion resistance as well as biocompatibility. Titanium alloys present superior strength-to-weight ratio, higher corrosion resistance and higher biocompatibility when compared to stainless steel and Co-Cr alloys. The Ti-6AI-4V aIloy (weight
Publicado em: 2001
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23. Argamassa de cimento reforçada com fibras de bagaço de cana-de-açucar e sua utilização como material de construção
In this research, "Cement mortar reinforced with sugar cane bagasse fibers and its use as building material", the use of solid waste from sugar alcohol industry as a component to alternative material. The addition of cane bagasse to cement mortar can result in a good building material, provided that problems of chemical incompatibility of fiber and cement ar
Publicado em: 1996
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24. An Investigation of Warts Prevalent among Workers in the Reduction Works of the Aluminium Industry