%0 Journal Article
%T Caracterizaci車n y Evaluaci車n de un Dep車sito de Caol赤n de ※Los Azufres§ Michoac芍n, M谷xico, para su Uso Industrial
%A Guillen A.
%A J.
%A Bribiesca
%A S.
%A Escudero G.
%A R.
%J Bolet赤n de la Sociedad Espaˋola de Cer芍mica y Vidrio
%D 2012
%I Sociedad Espa?ola de Cer芍mica y Vidrio
%R 10.3989/cyv.452012
%X In this work a kaolin ore from the region of ※Los Azufres§, state of Michoacan, Mexico, was characterized and evaluated in order to assess its use in the industry. A powder fraction less than 45 米m were studied by X-ray fluorescence (XRF), x-ray diffraction (XRD) and infrared spectroscopy (IR). The results showed high silica content of ~ 70%, associated with minerals such as cristobalite, tridymite and quartz followed by kaolinite and a small amount of alunite. The distribution, morphology and surface area of the particles were obtained by Laser Diffraction, Scanning Electron Microscopy (SEM) and Brunauer Emmett Teller technique (BET). Thermal characterization was performed by differential thermal analysis (DTA), thermal gravimetric analysis (TGA) and dilatometric analysis. The thermal characterization results displayed a strong mineral thermal expansion from room temperature to 300 ∼ C, followed by an abrupt contraction a temperatures between 580 ∼ C to 920 ∼. This could be associated with phase transformations of the polymorphs of silica, the dehydroxylation of the alunite and kaolinite and the desulfatation of alunite. The physical properties such as mineral color, degree of whiteness, plasticity, linear shrinkage and density were also determined. Finally whit the results obtained in this work, it can be concluded that the investigated ore is highly recommended for the cement industry and plastic. El caol赤n del dep車sito de ※Los Azufres§ del municipio de Zinap谷cuaro, estado de Michoac芍n, M谷xico, fue caracterizado y evaluado para su posible utilizaci車n industrial. Se estudi車 la fracci車n menor a 45 米m., por fluorescencia de rayos (FRX), difracci車n de rayos (DRX) y espectroscop赤a infrarroja (IR). Mostrando un alto contenido en s赤lice (70%), asociada a las fases presentes en el mineral; cristobalita, tridimita y cuarzo seguidos de la caolinita con peque as cantidades de alunita. La distribuci車n, morfolog赤a y el 芍rea superficial de las part赤culas fueron obtenidas por difracci車n de rayo l芍ser, microscop赤a electr車nica de barrido (MEB) y por la t谷cnica BET. Se realiz車 una caracterizaci車n t谷rmica mediante an芍lisis: t谷rmico diferencial (ATD), t谷rmico gravim谷trico (ATG) y dilatom谷trico; revelando una fuerte expansi車n t谷rmica del mineral desde temperatura ambiente hasta los 300 ∼C, seguido de una abrupta contracci車n entre 580∼C y hasta 920∼, relacionados con las transformaciones de fase de los polimorfos de la s赤lice, la deshidroxilaci車n tanto de la alunita como de la caolinita y la desulfataci車n de la alunita. Las propiedades f赤sicas tales como el color del mine
%K kaolin
%K characterization
%K mineral resources
%K industrial mineral
%K caol赤n
%K recursos minerales
%K caracterizaci車n
%K mineral industrial
%U http://ceramicayvidrio.revistas.csic.es/index.php/ceramicayvidrio/article/view/1169/1203