Mixture Of Gases
Mostrando 1-12 de 59 artigos, teses e dissertações.
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1. Analysis of cracks and coating in iron ore pellets by digital image processing
Abstract The pelletizing process agglomerates ore fines previously considered as tailings and makes its application possible in the form of pellets. During the process, the pellets are subjected to various compressive forces and temperature changes, which cause ruptures in their surface. These ruptures (cracks) impair the performance of the pellets in the re
REM, Int. Eng. J.. Publicado em: 2020-09
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2. Efeito da Adição de Propileno aos Gases de Proteção Convencionais na Soldagem GMAW Aplicada a Juntas de Topo e Ângulo
Resumo O presente trabalho teve por objetivo avaliar a adição de 1,3% de C3H6 ao CO2 puro e 0,6% de C3H6 à mistura de Ar+25%CO2, na soldagem de aço carbono utilizando o processo Gas Metal Arc Welding (GMAW) aplicado em juntas de topo com chanfro em V e ângulo em T. As soldas foram realizadas utilizando chapas de aço SAE 1020, arame de solda ER70S-6 de
Soldag. insp.. Publicado em: 02/12/2019
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3. Simulação computacional de dispositivos de mistura em câmara de combustão para gases de carbonização
Resumo O carvão vegetal proveniente de florestas plantadas é uma fonte de energia renovável utilizada na siderurgia do Brasil, todavia, em sua produção há liberação do gás de pirólise, que pode ser considerado um gás com baixo poder calorífico inferior. A sustentabilidade da produção de carvão vegetal tem demandado a queima destes gases, poden
Ciênc. Florest.. Publicado em: 30/09/2019
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4. Quantification and qualification of exhaust gases in agricultural diesel engine operating with biodiesel mixtures
RESUMO Motores de ciclo diesel são amplamente utilizados em máquinas agrícolas. O biodiesel oferece a possibilidade de substituição parcial ou total do diesel mineral, reduzindo assim a dependência da agricultura desse recurso não renovável e diminuindo as emissões de poluentes. O objetivo deste estudo foi avaliar as emissões de CO, NOx, SO2, CO2 e
Rev. bras. eng. agríc. ambient.. Publicado em: 09/09/2019
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5. Reduction of electric arc furnace dust pellets by mixture containing hydrogen
Abstract The large amount of dust generated in electric arc furnace aligned with its chemical composition makes this dust a potential source of iron in the direct reduction iron process. Thus, the aim of this research is to investigate the reduction of pellets produced with electric arc furnace dust using hydrogen as the reducing agent. The kinetic investiga
REM, Int. Eng. J.. Publicado em: 2019-03
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6. Achieving effective confinement through utilization of non-Newtonian fluid mixture as stemming structure
Abstract The economics of a mining operation is directly influenced by blasting outcomes, where blasting aims to comminute the rock mass in order to attain smaller grain sizes to be loaded and hauled at a minimum cost for its first processing stage. In order to promote adequate rock breakage, the stemming structure needs to provide proper confinement for the
REM, Int. Eng. J.. Publicado em: 2017-03
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7. Efecto del Gas de Protección, Ángulos de Trabajo y Desplazamiento sobre las Características de Juntas de Filete Obtenidas por GMAW en un Acero Microaleado de Alta Resistencia
Abstract: The fillet joint is one of the most used in several industries, particularly in the agricultural machinery. However, many times, the complexity of the parts to be joined difficult welder accessibility, therefore working and travel angles are important variables to analyze. Furthermore, in GMAW process, employing shielding gas mixture Ar-20%CO2 has
Soldag. insp.. Publicado em: 2016-09
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8. Production of porous ceramic materialusing different sources of alumina and calcia
ABSTRACTNumerous papers and publications report the use of microporous calcium hexaluminate (CaO.6Al2O3; CA6) as a key raw material for high temperature insulating materials. This material has unique properties with respect to chemical purity and mineral composition. Another important property of CA6 is its structure, which consists of platelet-shaped crysta
Matéria (Rio J.). Publicado em: 2015-09
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9. Polyimide hollow fiber membranes for CO2 separation from wet gas mixtures
Matrimid®5218 hollow fiber membranes were prepared using the dry-wet spinning process. The transport properties were measured with pure gases (H2, CO2, N2, CH4 and O2) and with a mixture (30% CO2 and 70% N2) in dry and wet conditions at 25 ºC, 50 ºC, 60 ºC and 75 ºC and up to 600 kPa. Interesting values of single gas selectivity up to 60 ºC (between 31
Braz. J. Chem. Eng.. Publicado em: 2014-12
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10. Plasma-spray synthesis and characterization of ti-based nitride and oxide nanogranules
The synthesis of nanosized Ti-based nanogranules via plasma spraying is reported. The synthesis route involved use of both nitrogen and oxygen gases with varying results. In the case of nitrogen, a mixture of titanium nitrides were produced, yielding both the Ti2N and the sub-stoichiometric TiN0.61 compounds. In the case of oxygen, both the stoichiometric ru
Mat. Res.. Publicado em: 15/08/2014
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11. Anaerobic bio-digestion of concentrate obtained in the process of ultra filtration of effluents from tilapia processing unit
The objective of the present study was to evaluate the efficiency of the process of biodigestion of the protein concentrate resulting from the ultrafiltration of the effluent from a slaughterhouse freezer of Nile tilapia. Bench digesters were used with excrements and water (control) in comparison with a mixture of cattle manure and effluent from the stages o
Revista Brasileira de Zootecnia. Publicado em: 2012-02
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12. Remoção de matéria orgânica carbonácea e nitrogênio em Reator Aeróbio-Anóxico de Leito Fixo (RAALF) aplicado ao pós-tratamento de efluente de reator anaeróbio / Removal of carbonaceous organic matter and nitrogen in an Aerobic-Anoxic Fix Bed Reactor (AAFBR) applied to the tertiary treatment of domestic wastewater
This work presents the Aerobic-Anoxic Fix Bed Reactor (AAFBR), with superimposed chambers, as an alternative concerning the post-treatment of anaerobic reactors efiluents aiming the removal of carbonaceous organic matter and nitrogen. Polyurethane foam cubic matrices (5 mm) were used packing material. Hydrodynamic essays were carried out in order to obtain t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2011