Por favor, use este identificador para citar o enlazar este ítem:
http://www.repositorio.ufop.br/jspui/handle/123456789/2052
Título : | The use of diffuse reflectance spectroscopy for the characterization of iron ores. |
Autor : | Costa, Geraldo Magela da Barrón, Vidal Ferreira, César Mendonça Torrent, José |
Palabras clave : | Iron ores Goethite Martite Specularite Reflectance |
Fecha de publicación : | 2009 |
Citación : | COSTA, G. M. et al. The use of diffuse reflectance spectroscopy for the characterization of iron ores. Minerals Engineering, v. 22, n.14, p. 1245-1250, 2009. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0892687509001587>. Acesso em: 28 jan. 2013. |
Resumen : | The aim of this work was to develop a diffuse reflectance methodology for quantifying minerals in powdered iron ores, which is a key quality control requirement for these materials. Selected samples ranging widely in their concentrations of hematite (as specularite and martite), goethite, magnetite, and quartz were collected in mines from the Iron Quadrangle, Minas Gerais State, and also in the Carajás region, Pará State, Brazil. A chemometric analysis based on the concentrations of the different minerals as determined with a combination of conventional methods (chemical analysis, X-ray diffraction, Mössbauer spectroscopy, light-reflected microscopy, and magnetic susceptibility) and the principal components derived from the diffuse reflectance spectra in the visible range was performed. Principal component regression analysis provided successful calibration for the concentrations of goethite (r2 = 0.94; standard error of validation (SEv) = 4.2%) and hematite (r2 = 0.89; SEv = 7.4%), in addition to good estimates for quartz (r2 = 0.83; SEv = 7.4%), specularite (r2 = 0.80; SEv = 11.6%), and martite (r2 = 0.78; SEv = 10.6%). Our results suggest that diffuse reflectance spectroscopy is a promising tool for the simultaneous determination of minerals in iron ores within a few minutes only. |
URI : | http://www.repositorio.ufop.br/handle/123456789/2052 |
ISSN : | 08926875 |
metadata.dc.rights.license: | O periódico Minerals Engineering concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3313110289313. |
Aparece en las colecciones: | DEQUI - Artigos publicados em periódicos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
ARTIGO_UseDiffuseReflectanceSpectroscopy.pdf | 399,89 kB | Adobe PDF | Visualizar/Abrir |
Los ítems de DSpace están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.