Ore Characterization
Mostrando 13-24 de 47 artigos, teses e dissertações.
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13. Porosity Characterization of Iron Ore Pellets by X-Ray Microtomography
This work proposes a three-dimensional methodology to characterize porosity in iron ore pellets by X-ray Microtomography (microCT). An image analysis routine was developed to discriminate and quantify open/closed porosity. The results were compared to the traditional techniques of mercury intrusion porosimetry (MIP) and optical microscopy (OM). As expected,
Mat. Res.. Publicado em: 22/01/2018
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14. Chemical and mineralogical characterization of silicon manganese iron slag as railway ballast
Abstract In nature, metal ores such as iron, lead, aluminum and others are found in an impure state, sometimes oxidized and mixed with silicates of other metals. During casting, when the ore is exposed to high temperatures, these impurities are separated from the molten metal and can be removed. The mass formed by these compounds is slag. Slag is the co-prod
REM, Int. Eng. J.. Publicado em: 2017-12
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15. Thermomagnetic Study for Identification of Mineral Phases
The characterization of materials is an area of extreme importance for engineering, it uses a range of instrumental techniques to provide an information bank for material analysis and selection. In the treatment of iron ore the mineralogical characterization is done, almost exclusively, by optical microscopy. However, materials with very fine granulometry, b
Mat. Res.. Publicado em: 22/05/2017
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16. Metallurgical characterization of kaolin from Atacama, Chile
Abstract In order to determine the exploitation potentiality of a kaolin deposit from Atacama in the north of Chile, two types of kaolin (K-1 and K-2) were characterized by XRD, XRF, SEM/EDXS, size distribution, whiteness and DSC. Kaolinite, quartz, muscovite and albite were recognized as main constituents of the ore deposit, and also a significant amount of
REM, Int. Eng. J.. Publicado em: 2016-12
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17. Geophysical modeling in gold deposit through DC Resistivity and Induced Polarization methods
Abstract Ore mining fundamentally depends on the definition of its tenor and volume, something extremely complex in disseminated mineralization, as in the case of certain types of deposits of gold and sulfites. This article proposes the use of electrical tomography for definition of a geophysical signature in terms of electrical resistivity and chargeability
REM, Int. Eng. J.. Publicado em: 2016-09
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18. Modelling and Simulation of the Santa Rita Mine Milling Circuit
Abstract The Santa Rita Mine, located in the State of Bahia, was the first Mirabela Mineração operation in Brazil. Started in 2009, the nickel sulphide processing plant has undergone constant modifications, aiming to adapt to the changes in the ore. Main modifications included autogenous grinding converted to semi-autogenous, as well as the installation of
Rem: Rev. Esc. Minas. Publicado em: 2016-06
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19. Estudo do processo de calcinação como operação unitária adicional na pelotização de minérios de ferro com altos valores de PPC
The mineral resources from the Alegria complex, at the Mariana Ouro Preto/MG region, where Samarco´s deposits (Alegrias Norte, Centro and Sul) are located, present a significant parcel of composition related to low iron grade itabirites (below 50%) and high LOI contents (above 3.5%). The search for producing concentrates from these deposits using the curren
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/06/2011
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20. Caracterização de rejeitos de minério de ferro para uso em pavimentação / Characterization of iron ore tailings for use in paving
In this work it was carried out a series of laboratory tests towards chemical, mineralogical and geotechnical characterization of rejects from iron ore processing, for use in paving. Material sampling was done in specific points as they were generated during the beneficiation process along the cycle, in order to preserve their properties. The alternative app
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/06/2011
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21. Contribuição ao estudo das bentonitas do município de Boa Vista Estado da Paraíba. / Contribution to the study of bentonite in Boa Vista state of Paraíba.
The clays are composed of clay minerals and accessory minerals, whose crystal structure allows the adsorption of cations giving them particular physical and chemical properties. Chemically, the argilomineriais are formed mainly of hydrated silicates of aluminum, iron and magnesium. The bentonites are special types of industrial clays because submitting more
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2011
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22. Caracterização geológica e tecnológica do minério de zinco do extremo norte da mina de Vazante, Minas Gerais / Technological and geological characterization of zinc ore from extreme North of Vazante s mine
A Faixa Vazante-Paracatu, localizada na porção noroeste de Minas Gerais, representa o mais importante distrito zincífero do país. Nos últimos anos, os depósitos de zinco não-sulfetados, como o de Vazante localizado nessa faixa, vem se destacando no cenário internacional devido aos teores de zinco mais elevados em relação aos de minérios sulfetados
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/01/2011
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23. MINERALOGICAL CHARACTERIZATION OF GOLD ORE OF THE RIO PARACATU MINERAÇÃO (RPM), AIMING AT THE DETERMINATION OF TITANIUM¿BEARING MINERALS / CARACTERIZAÇÃO MINERALÓGICA DO MINÉRIO DE OURO DA RIO PARACATU MINERAÇÃO (RPM), VISANDO A DETERMINAÇÃO DE MINERAIS PORTADORES DE TITÂNIO
This work presents studies in Minerals Characterization of gold ore sample from RPM-Kinross with objective to identify their titanium-bearing minerals and to assess its behavior in different size fraction (spectrum release). The methodology involved particle size analysis and minerals separation (separation in dense medium and magnetic separation), followed
Publicado em: 2010
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24. Caracterização tecnológica do minério de fosfato do complexo alcalino de Salitre, MG - área Fosfertil. / Technological characterization of phosphate ore from Salitre alkaline-carbonatitic complex, MG - Fosfertil area.
O presente estudo refere-se à caracterização tecnológica de tipos de minério de fosfato residual do complexo alcalino-carbonatítico de Salitre (MG), em área de interesse da Fosfertil. O procedimento experimental consistiu de moagem das amostras abaixo de 0,21 mm, análise granulométrica por peneiramento a úmido e separações minerais (líquido dens
Publicado em: 2010