[PDF] Top 20 Rev. Esc. Minas vol.67 número1
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Rev. Esc. Minas vol.67 número1
... Há quase 30 anos estou à frente da REM e a mim veio se juntar mais tarde o engenheiro Luciano Borba e a técnica em informática Elivânia Moreira.. Ela que aqui chegou com pouco mais de [r] ... See full document
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Rev. Esc. Minas vol.67 número1
... (2001) discuss the occurrence of toppling and buckling lexural mechanisms in foliated rock masses, focusing their occurrence in slope mines (see Figure 2).. Based on numer[r] ... See full document
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Rev. Esc. Minas vol.67 número1
... This paper presents the results of an evaluation of the weathering of different basaltic lithotypes (dense basalts, vesicular-amygdaloidal basalts, and basaltic breccias) from four b[r] ... See full document
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Rev. Esc. Minas vol.67 número1
... A drenagem ácida de mina é o resultado do processo de oxidação de rochas que contêm minerais sulfetados. Esse processo ocorre quando o material sulfetado é ex- posto a condições atmosféricas. Nessas condições, sucessivas ... See full document
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Rev. Esc. Minas vol.67 número1
... The present work presents a low-complexity iterative algorithm for circulating load calculation in mineral processing closed circuits, thus enabling the construction of reliable mass, [r] ... See full document
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Rev. Esc. Minas vol.67 número1
... de minas inoperan- tes sob a responsabilidade da Gerência de Fechamento de Mina e Projetos de Ferrosos/ Departamento de Planejamento e Desenvolvimento de Ferrosos – Vale SA, ...como minas nas quais as ... See full document
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Rev. Esc. Minas vol.67 número1
... The present study compares the action of the main frothers in terms of: mean bubble size in the pulp zone, froth stability, surface- tension-lowering ability and reagent participation i[r] ... See full document
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Rev. Esc. Minas vol.67 número1
... The printed circuit boards (PCB) represent approximately 30% of the electronic waste generated and its recycling is a complex process, but very important for the recovery of metals of [r] ... See full document
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Rev. Esc. Minas vol.67 número1
... of the heating rate on the kinetics austenite formation in the continuous heating of low carbon steel with initial microstructures composed of ferrite and pearlite, ferrit[r] ... See full document
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Rev. Esc. Minas vol.67 número1
... O Produto Granulado de Morro da Mina é um minério de manganês silicatado car- bonatado que apresenta grande potencial econômico para as empresas de ferro ligas insta- ladas em Minas Gerais. Entretanto o baixo teor ... See full document
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Rev. Esc. Minas vol.67 número1
... 2, that contains 50%w/w of ser- pentinite, presents a Strength (kgf/pellet) near the one obtained in test 1, containing only bentonite, with a strength reduction.. ) tumbles of the mi[r] ... See full document
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Rev. Esc. Minas vol.67 número1
... It is observed that the ashes produced in the enclosed furnace at 400ºC and 800ºC exhibit almost no diffraction peaks which indicates the presence of a high volume of amorphous mater[r] ... See full document
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Rev. Esc. Minas vol.67 número1
... Two tests were used to mechanically characterize the concretes reinforced with volume fractions of 1 and 1.5% hybrid steel ibers: four point bending tests (material scale) and rou[r] ... See full document
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Rev. Esc. Minas vol.67 número1
... Equation (8) provides a mathematical expression for the variation of the organic matter concentration with time as a func- tion of the complexation "equilibrium" constant,[r] ... See full document
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Rev. Esc. Minas vol.67 número1
... According to Jovanovic (1987), an automatic adjustment of this parameter at each iteration, through gradient type methods, would improve the rate of convergence. b) The value[r] ... See full document
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Rev. Esc. Minas vol.67 número3
... As noted above, from identiica- tion of the losses and bottlenecks in the unit operations of the mine, this study proposes to develop a diagnosis of the current practices in the dolom[r] ... See full document
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Rev. Esc. Minas vol.67 número3
... primary dendrite spacings as function of cooling rate during upward, downward, and horizontal directional solidiication of Al-7wt.%Si alloy. It can be seen that the[r] ... See full document
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Rev. Esc. Minas vol.67 número3
... To validate the representativeness of the borehole samples selected for the mineral processing studies, the geological resources evaluation team proposed a methodology based on the uti[r] ... See full document
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Rev. Esc. Minas vol.67 número3
... For the temperatures of 1100°C and 1150°C, the classiication obtained for the ceramic samples of Compostion A was stoneware (Group BIb) because the water absorption values were infer[r] ... See full document
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Rev. Esc. Minas vol.67 número3
... This article analyzed the problem of selection and purchase of mining equipment using the WPM, Electre I and Prométhée II methods, all three belonging to the MCDA methodology. The case study examined the acquisition and ... See full document
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