Ovens
Mostrando 1-12 de 40 artigos, teses e dissertações.
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1. Characterization of coal briquettes using tar as a binding material for use in a coke oven
Abstract In order to increase competitiveness in the steel industry through reduction of the cost of coal mixtures and increase in the quality productivity of coke in the oven, this research was developed with the aim of increasing the bulk density through briquetting of low power coking coal using tar as a binding material. Initially an industrial scale dou
REM, Int. Eng. J.. Publicado em: 2019-03
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2. PYROLIGNEOUS LIQUOR PRODUCED FROM ACACIA MEARNSII DE WILD WOOD UNDER CONTROLLED CONDITIONS AS A RENEWABLE SOURCE OF CHEMICALS
Acacia mearnsii de Wild (black wattle) is one of the most important trees planted in Southern Brazil for tannin extraction and charcoal production. The pyrolysis of the black wattle wood used for obtaining charcoal is performed in brick ovens, with the gas fraction being sent directly into the environment. The present study examines the condensable compounds
Quím. Nova. Publicado em: 2015-09
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3. Thermal aging of HTPB/IPDI-based polyurethane as a function of NCO/OH ratio
Thermal aging of hydroxy-terminated polybutadiene/isophorone diisocyanate (HTPB/IPDI)-based polyurethane was studied as a function of NCO/OH ratio (1.0 and 0.85). Samples were aged in air ovens at 50, 60, 65, and 70 ºC for periods of time from 1 to 34 weeks. Changes in chemical (swelling testing and FT-IR spectroscopy) and mechanical (tension testing and ha
Materials Research. Publicado em: 16/09/2011
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4. Herdabilidade, variabilidade de genetica e ganhos geneticos para producao e caracteres morfologicos em progenies ovens de seringueira.
O presente trabalho teve por objetivo estimar a heranca da produtividade e dos caracteres morfologicos em progenies de seringueira Hevea brasilienses ( Willd ex Adr. de Juss) Muell, Arg. Vinte e duas progenies de meios-irmaos foram plantadas na Estacao Experimental de Votuporanga, SP, no delineamento de blocos ao acaso. Aos tres anos de idade, os caracteres
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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5. Benefícios sociais e ambientais do coprocessamento de pneus inservíveis: estudo de caso na cidade de João Pessoa-PB
The useless tire is a residue that must be managed correctly until its final disposal as well as its collection and storage must be done adequately. Therefore, if it is inadequately disposed of, it can cause damages to the environment and to public health. In March 2005 the city of João Pessoa, initiated a program called Programa Nordeste Rodando Limpo - No
Publicado em: 2010
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6. Estudo comparativo da estampabilidade da liga de aluminio AA1050 partindo de placas obtidas por vazamento direto e bobinas obtidas por vazamento contínuo. / Comparative study of the deep drawing alloy AA1050 from plates obtained by direct casting and coils obtained by continuos casting.
Stampability of aluminum alloys is a subject of interest to several industrial sectors because they are largely used in the fabrication of several parts and components. The choice is based upon the stampability and the relative manufacturing capability in relation to other aluminum alloys that contain larger amounts of alloying elements and, consequently, hi
Publicado em: 2010
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7. Uma estratégia adaptada para síntese de magnetita
Chemical reactions in the solid state are often not included in undergraduate chemistry curricula, due to requirements for special laboratory facilities such as ovens and precision weighing balances. This work aims to describe novel and relatively simple magnetite chemical syntheses in dry medium, which could also be used as an alternative for freshmen chemi
Química Nova. Publicado em: 2008
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8. Estudo das transformaÃÃes de fase em Pseudo â ZTAs para aÃo API 5L X-70 visando desenvolvimento de dispositivo substrato
The microstructure transformation of structural steel has been studied from continuous cooling in metallic means to simulate the microestrutural transformations in different places in a HAZ (Heat Affected Zone). The studied material is Steel API 5L X70, largely used in piping in the Petrochemical Industries for its hight mechanical resistance and low weight,
Publicado em: 2008
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9. Descrições de técnicas da química na produção de bens de acordo com os relatos dos naturalistas viajantes no Brasil colonial e imperial
European naturalists explored Brazil in long scientific expeditions and published accounts that make up a rich and still largely untapped historiographic source for the understanding of the history of chemistry. The production of indigo dye, the manufacture of limestone, extraction and purification of saltpeter and the production of salt are discussed. Lime
Química Nova. Publicado em: 2007-10
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10. Arqueologia de uma fábrica de ferro : morro de Araçoiaba séculos XVI-XVIII / Iron Factory Archaeology : Araçoiaba Mount: XVI-XVIII centuries
This Thesis has the goal to analyze archaeological research and artifacts found in Afonso Sardinha Archaeological, site located on Mount Araçoiaba, Iperó São Paulo. The analysis result leads to the conclusion that the area corresponds to iron mining field with the presence of Iron Factory evidence, a system that makes use of hydraulic power to move the eq
Publicado em: 2007
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11. Avaliação dos impactos ambientais gerados por uma industria cerâmica típica da Região do Seridó/RN
The present work deals with an evaluation of the environmental impacts arised from a typical ceramics industry located in the Seridó region of Rio Grande do Norte State. That region contains the largest States producing basin of red ceramics. The district of Parelhas stands out as the largest producing nucleus. The studied company is located in the rural zo
Publicado em: 2007
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12. Adaptação de forno de microondas doméstico para realização de reações de transesterificação sob refluxo e catálise por argilas
The microwave oven became an important source of heating for many laboratory procedures including accelerating organic reactions. Reactions that require long reflux times can sometimes be carried out in a few hours or minutes in a conventional microwave oven. However, longer reflux times can be troublesome since domestic microwave ovens are not prepared for
Química Nova. Publicado em: 2006-04