Mining Projects
Mostrando 1-12 de 52 artigos, teses e dissertações.
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1. Comparison between traditional project appraisal methods and uncertainty analysis applied to mining planning
Abstract Long-term mining planning is a complex process which involves a large number of variables and uncertainties. Traditional discount cash flow (DCF) is usually used in the evaluation of mining projects. DCF includes net present value (NPV), internal rate of return (IRR), and profitability index (PI). A sensitivity analysis is usually carried out to eva
REM, Int. Eng. J.. Publicado em: 2020-06
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2. The spirit underneath: development, race and moral economy in Central Mozambique
Resumo Desde 2007, Tete, província central de Moçambique, passa por uma grande expansão econômica. Empresas multinacionais de mineração estão explorando um dos maiores - e praticamente intocados - depósitos de carvão do mundo. Liderados pela brasileira Vale, o bilionário e polêmico plano de investimento chamou a atenção de ONGs internacionais e
Vibrant, Virtual Braz. Anthr.. Publicado em: 28/11/2019
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3. Simulação de condição de fluxo em duto circular transportando polpa de bauxita de Paragominas (PA) na presença de aditivo modificador de viscosidade
RESUMO Sistemas de bombeamento de minérios por dutos tem atraído o interesse de mineradoras pois se tornam uma alternativa de transporte muito eficiente. Dentre os maiores desafios no projeto de bombeamento por dutos está a estimativa do fator de atrito, já que são muitas as variáveis que afetam este parâmetro. Uma amostra de polpa de bauxita de Parag
Matéria (Rio J.). Publicado em: 25/11/2019
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4. Os “Hidronegócios” nos rios da Amazônia
RESUMO O artigo discute a história dos rios amazônicos como lugares de “hidronegócios”, analisando as fontes e a produção historiográfica sobre os registros de usos e representações das águas, bem como os processos de apropriação dos rios no contexto do planejamento do desenvolvimento regional entre 1950 e 1985, norteado pelas ideias de progre
Rev. Bras. Hist.. Publicado em: 15/07/2019
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5. Evaluation of an iron ore price forecast using a geometric Brownian motion model
Abstract Mining projects are often budgeted in millions of dollars, making it of interest to the investor to measure a project’s uncertainties and risks, which include the changes in the commodity price. The simulation of asset prices is valid because it enables displaying, with a degree of certainty, the future behavior of a financial asset. One of the mo
REM, Int. Eng. J.. Publicado em: 2019-03
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6. Economic advantages of dynamic analysis in the early stages of mining projects
Abstract The use of dynamic simulation is technically advantageous for the project as shown by various authors. However, is it economically advantageous in the early stages of the project (FEL1 and FEL2)? The methodology to economically evaluate the use of dynamic simulation considers the time and development cost compared with the time and cost spent to cha
REM, Int. Eng. J.. Publicado em: 2018-07
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7. Direct block scheduling under marketing uncertainties
Abstract Mineral projects are composed of geological, operational and market uncertainties, and reducing these uncertainties is one of the objectives of engineering. Most surveys assess the impact of geological and operational uncertainties on the mining planning. The objective of this work is to study the impact of market uncertainty on the mineral activity
REM, Int. Eng. J.. Publicado em: 2018-04
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8. The Challenge to Scavenge IRON from Tailings Produced By FLOTATION A New Approach: The Super-WHIMS & the BigFLUX Magnetic Matrix
Abstract Tailings recovery has been a constant challenge for most engineers. Along more than five years, GAUSTEC joined major players in the mining Industry to scavenge Iron from tailings produced by flotation making use of WHIMS (Wet High Intensity Magnetic Separation). In the early 1980s, in USA, the US 4,192,738 patent was granted with promising results.
REM, Int. Eng. J.. Publicado em: 2017-09
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9. A high-level dynamic analysis approach for studying global process plant availability and production time in the early stages of mining projects
Abstract In the early stage of front-end studies of a Mining Project, the global availability (i.e. number of hours a plant is available for production) and production (number of hours a plant is actually operated with material) time of the process plant are normally assumed based on the experience of the study team. Understanding and defining the availabili
REM, Int. Eng. J.. Publicado em: 2017-06
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10. Mine surveying works for the purpose of excavating the remaining reserves of bauxite in the deposit of "Podbracan"
Mining projects for mineral resource mining contain in certain cases specific technical and technological solutions, these being the result of the mine’s characteristic spatial position and the geometry of the ore deposit, existing mining works, structures, and terrain relief etc. For the purpose of completion of the mining project, it is necessary to carr
Rem: Rev. Esc. Minas. Publicado em: 2015-09
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11. Visiones sobre los tránsitos socio-técnicos hacia patrones de consumo sustentable en agua y energía en la minería sudamericana - dos controversias argentinas
This paper addresses the problem of water and energy consumption in the South American mining from a perspective not much explored: the sustainable consumption. From the point of view of sociology and the social studies of science and technology, we expose the issue by presenting three different consumption patter
Sociologias. Publicado em: 2014-12
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12. Impacto da implantaçao de perímetros irrigados na qualidade das águas superficiais da porção mineira do médio São Francisco
The irrigation projects Jaíba Gorutuba and Laguna Grande located in the mining portion of the Middle San Francisco, occupying an irrigable area of approximately 31,493 ha. As irrigated agriculture has the potential to contaminate water resources due to deforestation, the application of fertilizers and pesticides, the objective of this research was to invest
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/03/2012