Thermobalance
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Carbothermic reduction of Electric Arc Furnace Dust via thermogravimetry
Abstract Electric Arc Furnace Dust (EAFD) is a solid waste originated from electric steelmaking furnaces. Currently, according to some authors, there is an estimated generation of 15 to 25 kg of dust per ton of steel produced. The formation of the dust is related to the following steps of the process: furnace charge, metal volatilization, iron vaporization u
REM, Int. Eng. J.. Publicado em: 2018-07
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2. DETERMINATION OF THE KINETIC PARAMETERS OF OXY-FUEL COMBUSTION OF COAL WITH A HIGH ASH CONTENT
Abstract The aim of this study was to determine the kinetic parameters of the oxy-fuel combustion of char from a Brazilian bituminous coal with a high ash content. The char, with a particle diameter of 715 μm, was prepared in a N2 atmosphere at 1173 K. The oxy-fuel combustion assays were performed using a thermobalance at different temperatures and O2/CO2 g
Braz. J. Chem. Eng.. Publicado em: 2015-03
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3. DESENVOLVIMENTO DE METODOLOGIA PARA AVALIAÇÃO DA TENDÊNCIA À REOXIDAÇÃO DE PELOTAS DE MINÉRIO DE FERRO REDUZIDAS EM PROCESSO DE REDUÇÃO DIRETA A GÁS / DESENVOLVIMENTO DE METODOLOGIA PARA AVALIAÇÃO DA TENDÊNCIA À REOXIDAÇÃO DE PELOTAS DE MINÉRIO DE FERRO REDUZIDAS EM PROCESSO DE REDUÇÃO DIRETA A GÁS
Among the alternative processes for reducing iron oxide to produce iron and steel, the most currently used is the Midrex technology. The product may be the sponge iron, also called DRI (Direct Reduced Iron), composed mainly of metallic iron and iron oxide, or HBI which is the DRI pressed in the form of briquettes. DRI has a tendency to reoxidation in air, es
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/11/2010
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4. Thermal analysis evaluation of the reactivity of coal mixtures for injection in the blast furnace
Pulverized Coal Injection (PCI) is an important standard technology replacing coke partially by pulverized coal into the blast furnace that allows a significant reduction of hot metal costs and environmental impact, contributing to a decrease of coke requirements for ironmaking. Coals typically used in this process in Brazil are, at current time, exclusively
Publicado em: 2010
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5. PHYSICOCHEMICAL DEGRADATION OF PVC CAUSED BY OIL DERIVATIVES / DEGRADAÇÃO FÍSICO-QUIMICA DO PVC CAUSADA POR DERIVADOS DE PETROLEO
O PVC é o único polímero de grande consumo que não é 100% originário do petróleo, pois contêm, em peso, 57% de cloro (derivado do cloreto de sódio - sal de cozinha) e apenas os restantes 43% de eteno são derivados do petróleo. Como as matrizes ricas em cloro são privilegiadas para aplicações em meios ambientes ricos em bactérias, tais como dut
Publicado em: 2009
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6. High temperature oxidation behavior of the AISI 430A and AISI 430E stainless steels in Ar/H2/H2O atmosphere
The high temperature oxidation behavior of two ferritic stainless steels type AISI 430A and AISI 430E is examined at low oxygen pressure and high temperatures. The AISI 430A steel is ferritic up to 860 °C. Above this temperature, this steel is bi-phased: presence of austenite and ferrite phases. The 430E steel is stabilized with Nb, and is ferritic at all t
Materials Research. Publicado em: 2008-06
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7. Estudo experimental da oxidação dos aços inoxidáveis ferríticos AISI 444 e AISI 439 a altas temperaturas em ar
It was carried on a comparative study of the response to oxidation, in high temperatures and dry air atmosphere, of the stainless steel AISI 444 and AISI 439, with the temperature range between 850C and 1.050C. Such steels differ in their chemical composition basically by containing molybdenum in the AISI 444 steel. It were used samples supplied by ArcelorMi
Publicado em: 2008
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8. High-temperature oxidation of pure Fe and the ferritic steel 2.25Cr1Mo
The global pressure for recycling and ecological energy production increases steadily in combination with the demand of cost-effective application of materials. However, some severe corrosion problems, associated with the high internal/intergranular corrosion rates in boiler components need to be avoid. Some commercial boiler materials contain a Cr content o
Materials Research. Publicado em: 2005-12
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9. STUDY OF HIGH-SPEED STEELS OXIDATION UNDER DRY AND MOIST AIR ENVIRONMENTS AND UNDER CYCLIC OXIDATION CONDITION / ESTUDO DA OXIDAÇÃO DE AÇOS RÁPIDOS EM ATMOSFERA DE AR SECO E ÚMIDO E EM CONDIÇÃO DE CICLAGEM TÉRMICA
O desenvolvimento e a utilização de aços rápidos para a produção da casca externa de cilindros destinados à laminação de tiras a quente tiveram início no começo dos anos 90. A introdução deste material melhorou, significativamente, a resistência ao desgaste do cilindro, a qualidade da tira laminada e a duração da campanha de laminação. Repr
Publicado em: 2002