Electric Arc Furnace
Mostrando 25-32 de 32 artigos, teses e dissertações.
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25. DEVELOPMENT OF A COMPUTATIONAL TOOL FOR OPTIMIZATION AND VALUE IN USE FORECAST FOR IRON ORE PELLETS THROUGH THE DIRECT REDUCTION: ELECTRIC STEELMAKING ROUTE / DESENVOLVIMENTO DE UM MODELO COMPUTACIONAL DE OTIMIZAÇÃO E PREDIÇÃO DO VALOR DE USO DE PELOTAS DE MINÉRIO DE FERRO NA ROTA REDUÇÃO DIRETA: ACIARIA ELÉTRICA
The study at issue searched for developing an innovative tool able to effectively analyze and optimize the industrial usage of iron ore pellets undergoing traditional gas-based direct reduction processes. The creation of a thermochemical model for MIDREX process was proposed and carried out by PUC-Rio, taking into account relevant characteristics related to
Publicado em: 2007
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26. Modelamento matemático do refino do aço inoxidável em conversores AOD-L
In the present work was presented a study about the development and the application of a multiphase and multicomponent mathematical model for the decarburisation of stainless steels. The developed model takes into account three possible interfaces of reaction (metal-gas, metal-oxide and oxide-gas) and considers the main components involved in the process (C,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/12/2006
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27. Characterization study of electric arc furnace dust phases
Electric arc furnace dust (EAFD) is a solid waste generated in the collection of particulate material during steelmaking process in electric arc furnace. The aim of this work is to carry out a chemical and structural characterization of two EAFD samples with different Zn contents. Optical emission spectroscopy via inductively coupled plasma (ICP), X ray diff
Materials Research. Publicado em: 2006-03
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28. Síntese de nanotubos de carbono de parede simples por sublimação de grafite em atmosfera de hélio
Macroscopic samples of fullerene nanostructures are obtained in a modified arc furnace using the electric arc method with a Helium atmosphere at low pressures. High purity graphite rods are used as electrodes but, when drilled and the orifices filled with powders of transition metals (Fe, Co, Ni) acting as catalysts, the resulting particles are carbon nanost
Química Nova. Publicado em: 2002-02
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29. Avaliação do diagrama de fases Ni-Al-Nb e obtenção da estrutura eutetica NiAl-NiAlNb
The solidification of an eutectic alloy results in two or more solid phases, which grow in cooperative form. Such phenomenon makes this type of alloy interesting for obtainment of in situ composites. An in situ composite shows different properties than the individual component phases, that can result in a material with interesting features with regards to me
Publicado em: 2002
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30. Otimização da operação de fornos eletricos de arco direto
An optimisation model for the operation of direct arc electric furnaces that use scrap as the main raw material is presented in this thesis. A knowledge of the electric circuit to which the furnace is connected, as well as the design and operational characteristics of the equipment, are required for the modelling. A backward dynamic programming routine is em
Publicado em: 1998
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31. SERIES LIMITING CURRENT REACTOR FOR ARC FURNACES / REATOR SÉRIE LIMITADOR DE CORRENTE PARA FORNOS A ARCO
This thesis presents the main electromechanical phenomena, occuring during the operating of an arc furnace, focusing the electric and magnetic ones. It also presents a digital simulation aiming to verify that the utilization of a series limiting current reactor included into the furnace feeding circuit, for arc stabilization purposes, does not reduce its ope
Publicado em: 1997
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32. Projeto, construção e utilização de fornos para fusão de ligas Fe-Ti e Mg-Ni para armazenagem de hidrogenio
Two melting systems were built to prepare Fe-Ti alloys and Mg-Ni alloys at interesting composition for hydrogen storage. Fe-Ti alloys and Mg-Ni alloys were melted by arc-electric system and electric resistance system respectively. Design, construction, assembly and use of both melting systems axe described in the present work. Initially the design criterion
Publicado em: 1979