Applied Mineralogy
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Does Ferralsol Clay Mineralogy Maintain Potassium Long-Term Supply to Plants?
ABSTRACT Ferralsols ( Latossolos ) should contain few or no 2:1 clay minerals and have low potassium (K) contents, and consequently low levels of non-exchangeable K forms are expected. The aim of this study was to evaluate how the clay mineralogy of a Ferralsol affects the soil K dynamics in response to K fertilization during cropping and whether the clay mi
Rev. Bras. Ciênc. Solo. Publicado em: 15/04/2019
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2. Brazilian refractory grade bauxite: a new alternative to refractories makers and users
Abstract After two centuries of the discovery, we now know that there are several types of bauxites, in which mineralogy points to the most appropriate application. In the non-metallurgical industry, bauxites with refractory grades have been applied as raw materials in the production of high-alumina refractories for both shaped and unshaped. The increase in
Cerâmica. Publicado em: 2019-01
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3. Multivariate Analysis and Machine Learning in Properties of Ultisols (Argissolos) of Brazilian Amazon
ABSTRACT: Ultisols are the most common soil order in the Brazilian Amazon. The Legal Amazon (LA) has an area of 5 × 106 km2, with few accessible areas, which restricts studies of soils at a detailed level. The pedological properties can be estimated more efficiently using statistical procedures and machine learning techniques, tools which are capable of rec
Rev. Bras. Ciênc. Solo. Publicado em: 06/12/2018
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4. Surface Spectroscopy of Oxisols, Entisols and Inceptisol and Relationships with Selected Soil Properties
ABSTRACT: Traditional method of soil survey is expensive, slow, and must be carried out by experienced researchers. Thus, advances in soil observation technologies and the need to obtain information quickly by modern techniques have intensified the use of proximal sensing. This study characterized surface reflectance spectra (A horizon) and related them to t
Rev. Bras. Ciênc. Solo. Publicado em: 01/02/2018
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5. Processes for phosphorus removal from iron ore - a review
This paper aims at reviewing literature on the occurrence of phosphorus in iron ores from the mines around the world. The review extends to the phosphorus removal processes of this mineral to meet the specifications of the steel industry. Phosphorus is a contaminant that can be hard to remove, especially when one does not know its mode of occurrence in the o
Rem: Rev. Esc. Minas. Publicado em: 2015-09
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6. Estudo da composição e distribuição da alteração hidrotermal do Cerro Aguas Calientes, Salta, Argentina a partir de imagens do sensor ASTER
The conception of the ASTER sensor by the end of the 1990s brought new benefit to the mapping of hydrothermal alteration zones, initiating a promising phase in remote sensing of earthly resources. Recent studies utilizing this sensor for mineralogical mapping have proved its effectiveness. This study tested the hyperspectral classification in ASTER multispec
Publicado em: 2009
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7. Phosphorus dynamics and availability in soils cultivated with production coffee plants, / DinÃmica e disponibilidade de fÃsforo em solos cultivados com cafeeiro em produÃÃo
During many years coffee (Coffee arabica L.) plants have been considered low responsive to phosphorus fertilization. However, recent research data show that these plants demand high phosphorus quantity to fully develop their vegetative and reproductive systems. Aiming to know how phosphorus availability is influenced by annual P doses and how they may influe
Publicado em: 2009
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8. CARACTERIZAÇÃO FÍSICO-QUÍMICA-MINERALÓGICA E MICROMORFOLÓGICA DE UM PERFIL DE ALTERAÇÃO DE ROCHA ALCALINA DO RIO DE JANEIRO / RESIDUAL SOIL ALKALINE ORIGIN CHARACTERIZATION AT THE TANGUÁ CITY, RIO DE JANEIRO
The behavior of rock decomposition products has been studied by many authors throughout the country. These works have great importance for the geotechnical engineering, mainly in tropical regions, with hot and rainy climates, like it is found in Brazil, since atmospheric conditions have a great influence in the soil formation originated from the mother rock.
Publicado em: 2008
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9. AvaliaÃÃo petrogrÃfica e experimental de agregados graÃdos afetados por deformaÃÃo tectÃnica, desenvolvimento de minerais de alteraÃÃo e texturas de exsoluÃÃo
Concrete deterioration due to alkali-aggregate reaction (AAR) represents serious problem throughout the world. Geological structurals such as shear zones are formed from compressive, extentional and shearing tectonics movement. Rocks close to fault zones usualy have mineralogical features unsuitable to be used as aggegate. This research reports on the micros
Publicado em: 2008
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10. Aplicação de índice mineralógico como apoio na avaliação de reservas da mina de fosfato de Cajati-SP / Applied of a mineralogical gnide as supportto reserve evaluation of the fosfate rock of Cajati-SP
A mina de fosfato de Cajati localiza-se a 230 km a sudeste da cidade de São Paulo. Nela aflora, de forma alongada segundo a direção N27ºW, um corpo de carbonatito mineralizado a apatita. O corpo mineralizado é subdividido em unidades litológicas a partir de variações nas características físicas (estruturas) e mineralógicas da matriz carbonática,
Publicado em: 2007
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11. Applied mineralogy to the beneficiation of the xenolithic zones, Cajati Mine, SP. / Mineralogia aplicada ao beneficiamento das zonas de xenólitos, Mina de Cajati, SP.
A mina de carbonatito de Cajati contém mineralização de apatita, utilizada na fabricação de ácido fosfórico, que é aplicado a matéria-prima carbonática para obtenção de foscálcio, suplemento mineral em rações animais. Dentre as unidades litológicas em lavra destacam-se as Zonas de Xenólitos, formadas pela interação da rocha encaixante com
Publicado em: 2007
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12. Caracterização tecnológica de resíduos de construção e demolição. / Technological characterization of construction and demolition waste.
Construction and demolition waste (CDW) represents around 50% of the total solid waste and are essentially constituted by mineral fraction (>90%); therefore it?s possible to recycle it through mineral processing techniques. The development of different uses and the improvement of the typical technologies applied to CDW recycling are essential to achieve a sa
Publicado em: 2006