Mill Scale
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Os negros d’água do rio Ribeira de Iguape: mito e história numa narrativa elaborada por comunidades negras do Vale do Ribeira
RESUMO Este artigo aborda a importância das águas do rio Ribeira de Iguape para a história do Vale do Ribeira. Suas águas foram exploradas desde o século XVI, quando da sua foz partiam expedições em busca de metais. Posteriormente, metais preciosos foram descobertos no Alto e no Médio Vale, onde se estabeleceram arraiais mineradores. No final do séc
Rev. Bras. Hist.. Publicado em: 29/07/2019
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2. GRANULOMETRY AND ENERGY CONSUMPTION AS INDICATORS OF DISINTEGRATION EFFICIENCY IN A HAMMER MILL ADAPTED TO EXTRACTING ARROWROOT STARCH (Maranta arundinacea) IN COMPARISON TO STARCH EXTRACTION FROM CASSAVA
ABSTRACT The commercial sector of starch extraction has fully automated plants with a minimum scale of 200 ton.day–1, which extracts starch from maize and cassava in Brazil. Although these starches are commodities, the market demands starches with special properties obtained without chemical modifications. A higher-priced starch can compensate for small-sc
Eng. Agríc.. Publicado em: 19/06/2019
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3. Amorphization of Graphite Flakes in Gray Cast Iron Under Tribological Load
A gray cast iron disc, which had been submitted to a heavy duty automotive brake test, was examined with energy filtered transmission electron microscopy. A graphite flake in a convenient angular position showed the shear interaction of graphite layers with the iron matrix in nano-scale resolution. Atomic layers of graphite were wedged into the ferritic bulk
Mat. Res.. Publicado em: 28/05/2018
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4. Characterization of Some Efficient Cellulase Producing Bacteria Isolated from Pulp and Paper Mill Effluent Contaminated Soil
ABSTRACT The wide variety of bacteria in the environment permits screening for more efficient cellulases to help overcome current challenges in biofuels production. This study focuses on the isolation of efficient cellulase producing bacteria found in pulp and paper mill effluent contaminated soil which can be considered for use in large scale biorefining. F
Braz. arch. biol. technol.. Publicado em: 08/01/2018
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5. Efficiencies of Dipolymer Rubber Blends (EPDM\FKM) using Common Weight Data Envelopment Analysis
Polymer blends are generally categorized into two main classes: miscible blends that exist in a single homogeneous phase exhibiting synergistic properties and immiscible blends that have 2 or more different phases. There is also a third category of blends called technologically compatible blend, which exist in two or more different phases on micro scale, yet
Mat. Res.. Publicado em: 09/10/2017
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6. Comminution circuits for compact itabirites
Abstract In the beneficiation of compact Itabirites, crushing and grinding account for major operational and capital costs. As such, the study and development of comminution circuits have a fundamental importance for feasibility and optimization of compact Itabirite beneficiation. This work makes a comparison between comminution circuits for compact Itabirit
REM, Int. Eng. J.. Publicado em: 2016-09
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7. DISPONIBILIDADE HÍDRICA NA PRODUÇÃO DE GIPSOFILA (GYPSOPHILA PANICULATA) EM VASOS COM SUBSTRATO DE CASCA DE ARROZ CARBONIZADA / WATER AVAILABILITY ON GIPSOFILA (GYPSOPHILA PANICULATA) GROWING IN POTS WITH SUBSTRATE RICE HUSK CARBONIZED
Ornamental plants in general are highly susceptive to water deficiency, principally to the elevated soil water level variation that effects at a precarious and uneven final product development. The study was conducted on greenhouse at the Universidade Federal de Santa Maria, RS. It aimed to observe if rice husk ash substrate offers limitation to the pot cult
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/03/2012
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8. Incorporação da variabilidade dos teores para análise de risco de recursos minerais e sequenciamento de lavra
Mining industry continuously investigates proper reconciliation procedures and techniques for mapping possible risks in ore recovery and mine planning. A case study at a Brazilian copper mine investigates the adequacy of using simulated grades for defining high risk areas affecting mine planning and the defined mineral reserves. Conditional simulations were
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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9. Estudo de reciclagem da carepa através de briquetes autorredutores para uso em forno elétrico a arco
A presente tese teve como objetivo fornecer subsídios teóricos e experimentais com vistas à reciclagem da carepa gerada em usinas mini-mills através de briquetes autorredutores para uso em FEA. Para atingir os objetivos vislumbrados, o trabalho foi estruturado em quatro principais tópicos: estudo de caracterização e de redutibilidade da carepa, escolh
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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10. Effects of microstructure on the fatigue crack growth behavior of light metals and design considerations
Fatigue crack growth mechanisms of long and small cracks were investigated in cast and wrought aluminum and titanium alloys with various microstructures (as-cast A535, 6061-T61, and mill-and beta annealed Ti-6Al-4V). In addition, friction stir welded and cold spray processed 6061-T61 were also investigated. The effects of microstructure on the fatigue crack
Matéria (Rio de Janeiro). Publicado em: 2010
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11. Desenvolvimento de briquetes autorredutores a partir de carepas de processamento siderúrgico para utilização em forno elétrico a arco
A indústria siderúrgica do Estado do Rio Grande do Sul é do tipo semi-integrada e produz aço a partir de sucata, utilizando fornos a arco elétrico. Em suas atividades gera vários tipos de resíduos, dentre estes as carepas, cujo componente principal são óxidos de ferro. Este material não encontra utilização e geralmente tem destinação final em a
Publicado em: 2010
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12. Branqueamento de polpa celulósica kraft de eucalipto com peróxido ácido ativado por molibdênio
Optimum conditions to run the P Mo stage for bleaching eucalyptus kraft pulp were 90 ºC, pH 3.5, 2 h, 0.1 kg/t Mo and 5 kg/t H2O2. The P Mo stage efficiency increased with decreasing pH (1.5-5.5) and increasing temperature (75-90 ºC), time (2-4 h), and hydrogen peroxide (3-10 kg/t) and molybdenum concentration (0.1-0.4 kg/t). The implementation of the P Mo
Química Nova. Publicado em: 2009