Copper Ore
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Mineralogical characterization of copper lateritic ore from the Furnas deposit - Carajás, Brazil
Abstract Furnas is a small and not well-known copper sulfide deposit in the northern Carajás mineral province (Pará State, Brazil). Mineralogical and geochemical studies were performed on three weathered samples in order to verify the presence of copper in the lateritic minerals. According to these Cu-bearing minerals (malachite, e.g.), the weathered ore c
REM, Int. Eng. J.. Publicado em: 2020-09
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2. The Cristalino IOCG deposit: an example of multi-stage events of hydrothermal alteration and copper mineralization
Abstract The Cristalino deposit is located 40 km east of Sossego mine, Carajás. The orebody lies along a NW-SE-striking shear zone and is mainly hosted by the Neoarchean bi-modal volcanics of the Grão Pará Group. Field work and petrographic data seconded by SEM-EDS analysis allowed recognizing an early sodic metasomatism that was followed by calcic-ferric
Braz. J. Geol.. Publicado em: 15/04/2019
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3. Removal of entrained organic matter in the copper electrolyte by ozonation
Abstract Organic matter-in-aqueous entrainment is a serious problem in the hydrometallurgical extraction of copper from ore. Current inefficiencies, changes in the morphology and orientation of cathode deposit are some of the problems when organic matter is present in the advance electrolyte. In addition, negative effects upon metabolic activity of bioleachi
REM, Int. Eng. J.. Publicado em: 2019-03
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4. Aspectos de la formación de polvo volátil en la industria del cobre primario
ABSTRACT In addition to the production of primary copper and ferro silicate slag, the formation of significant amounts of flue dust plays an increasingly important role in today’s copper industry. While valuable elements such as copper and precious metals primarily remain in the heavier, denser products, others such as zinc and lead preferably accumulate i
Matéria (Rio J.). Publicado em: 19/07/2018
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5. Effectiveness acidic pre-cleaning for copper-gold ore
Abstract The presence of copper-bearing minerals is known to bring on many challenges during the cyanidation of gold ore, like high consumption of cyanide and low extraction of metal, which are undesirable impacts on the auriferous recovery in the subsequent process step. The high copper solubility in cyanide prevents the direct use of classical hydrometallu
REM, Int. Eng. J.. Publicado em: 2017-12
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6. Incorporation of geological uncertainty in pit optimization with geostatistics simulation
Abstract Risk mapping processes in mine planning and ore recovery are constantly used in the mining industry to increase decision making certainty based on the available information. However, it is not possible to predict the risk behavior in all of the project's boundary conditions and small variations in some of these conditions can cause a great impact on
REM, Int. Eng. J.. Publicado em: 2017-09
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7. LEACHING OF MALACHITE ORE IN AMMONIUM SULFATE SOLUTIONS AND PRODUCTION OF COPPER OXIDE
Abstract Malachite ore is one of the most important of oxidized copper ores. Copper production can be performed by using this ore. In this work, the leaching kinetics of malachite in ammonium sulfate solutions was investigated, and metallic copper was recovered by a cementation method from the resulting actual leach solution. Copper (II) oxide was prepared b
Braz. J. Chem. Eng.. Publicado em: 2015-03
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8. Bacterial consortium for copper extraction from sulphide ore consisting mainly of chalcopyrite
The mining industry is looking forward for bacterial consortia for economic extraction of copper from low-grade ores. The main objective was to determine an optimal bacterial consortium from several bacterial strains to obtain copper from the leach of chalcopyrite. The major native bacterial species involved in the bioleaching of sulphide ore (Acidithiobacil
Braz. J. Microbiol.. Publicado em: 20/08/2013
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9. Up-gradation of MoO3 and separation of copper, iron, zinc from roasted molybdenum ore by a leaching process
The present research paper deals with the oxidation process of molybdenum ore. The main target of the present study is the up-gradation of MoO3 from roasted molybdenum ore by a leaching process without waste generation. The most important application of hydrometallurgical processing is the leaching process of the ore and it is the primary process to make pur
Braz. J. Chem. Eng.. Publicado em: 2013-06
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10. 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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11. Impacto de diferentes algoritmos e geometria de depósitos minerais no planejamento de longo prazo
The main objective of mine planning is to determine ore quantity and quality distribution along a time sequence, i.e., scheduling the ore necessary to make the project technically and economic viable. These temporal sequences are fundamental for the financial success of a mine activity and presently this optimal sequence can be obtained through various minin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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12. Padrão mineralógico de ocorrência dos depósitos de minério de cobre hospedados em escarnitos e mármores da região de Caçapava do Sul - RS
A Província Cuprífera do Escudo Sul-Riograndense, na região de Caçapava do Sul, possui diversas ocorrências de minérios de cobre e ouro. Essas ocorrências possuem estilos e dimensões peculiares e estão hospedadas em rochas vulcano-sedimentares do Grupo Bom Jardim e metamórficas do Complexo Passo Feio. Esse trabalho estuda corpos de minério de cobr
Publicado em: 2011