Electric Arc
Mostrando 13-24 de 66 artigos, teses e dissertações.
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13. Evaluation of recycled MgO-C bricks and dead-burned dolomite fines in setting slag foaming in the electric arc furnace
Abstract Production cost reduction for the Electric Arc Furnace (EAF) technology is strongly dependent on the efficiency of the electrical energy being introduced into the metal bath. Besides EAF technology, the slag foaming process is currently applied to some other equipment for steel production aiming to save energy, productivity improvements, enhance the
REM, Int. Eng. J.. Publicado em: 2018-03
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14. MgO Saturation Analisys of CaO-SiO2-FeO-MgO-Al2O3 Slag System
Electric arc furnace (EAF) slag has a range of functions, including improving energy efficiency through the "slag foaming" phenomenon. As such, the study of slag is important in EAFs. One of the factors that determine foaming quality and efficiency is the presence of solid particles. MgO saturation is highly significant since, in addition to ensuring the pre
Mat. Res.. Publicado em: 30/11/2017
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15. Slag Evaluation to Reduce Energy Consumption and EAF Electrical Instability
In steel mills that operate with electric arc furnaces (EAF), it is interesting to ensure greater stability to the electric arc to aim at less distortion in the electrical system, with consequent reduction in electric power consumption. The slag foaming increases electric arc stability by reducing the total harmonic distortion (THD) between EAF phases. In th
Mat. Res.. Publicado em: 01/09/2016
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16. Effect of Mill Type on Morphology of AA6013 Aluminium Powder
ABSTRACT In conventional recycling method, metal chips are cast after pressing and melting in electric arc furnace. Material loss occurs during the recycling from liquid metal due to the several reasons. Direct recycling method which produces the aluminium powder from aluminium chips using mechanical mill can be an alternative to conventional recycling metho
Matéria (Rio J.). Publicado em: 2016-09
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17. Anionic Aliphatic Polyesteramide Copolymers: Evaluation of Dielectric Properties
This study looks at the effects on the dielectric behavior as result of the incorporation of ester sequences along the nylon 6 chains. The aliphatic polyesteramide copolymers and nylon 6 homopolymer were synthesized via anionic ring-opening copolymerization using the rotational molding technique by varying the ratio of the ε-caprolactam (CLA) and ε-caprola
J. Braz. Chem. Soc.. Publicado em: 2015-02
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18. Characterization and three-dimensional reconstruction of pores of self-reducing pellets done by EAF dust
This work focused on the characterization physical and microstructural of the self-reducing pellet made of Electric Arc Furnace (EAF) dust using different low cost techniques. The serial sectioning technique was used to evaluate detailed measurements of pore connections, tortuositiy of pores and porosity distribution. The chemical analysis using Inductively
Mat. Res.. Publicado em: 23/08/2013
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19. Modificação e caracterização do resíduo pó de aciaria elétrica (PAE) para aplicação em reações de redução de cromo (VI)
In this study, electric arc furnace dust (EAFD) was thermally modified at different temperatures under H2 flow or charcoal in order to obtain reduced iron phases (Fe3O4, FeO and Fe0). The formation of these phases was confirmed by powder X-ray diffraction. The tests performed for reducing Cr (VI) using resultant materials obtained after thermal treatment of
Quím. Nova. Publicado em: 2013
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20. Análise de filtros híbridos aplicados a um forno elétrico a Arco
Uma planta siderúrgica caracteriza-se pela existência em seu processo produtivo de cargas não lineares de elevada potência. Dentre estas cargas, as siderúrgicas do tipo mini-mill possuem normalmente Forno Elétrico a Arco (FEA) na sua fase inicial de produção do aço, que ocorre a partir da fusão de sucatas metálicas como principal matéria-prima ut
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/09/2011
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21. ESTUDO GEOMETALÚRGICO DE GRANULADOS E PELOTA DE MINÉRIO DE MANGANÊS / ESTUDO GEOMETALÚRGICO DE GRANULADOS E PELOTA DE MINÉRIO DE MANGANÊS
Aiming to characterize intrinsic properties of granular products and pellets of manganese ore, this study proposes an experimental methodology to allow the evaluation and comparison of the quality of five lumpy manganese ores and a manganese pellet. The work presents chemistry, mineralogy, density, specific surface and porosity, in addition to the metallurgi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2011
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22. Caracterização por espectroscopia de fotoelétrons de nanotubos de carbono funcionalizados
This work deals with the characterization of functionalized carbon nanotubes, using photoelectron spectroscopy (XPS). The nanotubes are multi-walled nanotubes (MWNT) grown by chemical vapor deposition (CVD) and single-walled nanotubes (SWNT) grown by electric arc discharge. By functionalization we mean the aggregation of functional groups to the walls of the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/06/2011
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23. QUANTIFICATION OF METALLIC IRON LOSSES IN ELECTRIC ARC FURNACE SLAGS / QUANTIFICAÇÃO DAS PERDAS DE FERRO METÁLICO EM ESCÓRIAS DE FORNO ELÉTRICO A ARCO
A metalurgia é a ciência que estuda os diversos meios para a transformação dos metais em materiais úteis à sociedade. A metalurgia do ferro representa a maior fatia da aplicação dos metais. Por ser tão representativa é chamada de Siderurgia. Dentre as diversas rotas para a transformação do ferro em aço, as usinas semi-integradas apresentam um fo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/04/2011
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24. Estudos sobre gases dissolvidos em óleos vegetais isolantes - influência de arco elétrico e superaquecimento / Dissolved gases analysis in insulating oils - the influence of electric arc and overheating
A inovação tecnológica é uma ferramenta muito poderosa utilizada para avançar estrategicamente no mundo competitivo. Esta tendência também é uma realidade nos sistemas de isolamento dos transformadores. Os isolamentos passam então a ser avaliados tanto do ponto de vista econômico, quanto do ambiental e da segurança. Em todo o mundo, são consumido
Publicado em: 2011