Patent ID: 6983060
Filing Date: 2006-01-03
Classification: G01N

Abstract:
1. Method for measuring degree and homogeneity of calcination of alumina utilizing an image analysis device equipped with a sensitive camera in a spectral analysis window corresponding to a wavelength range equal to or in the vicinity of visible light and comprising the steps of: a) mixing alumina under analysis in a liquid wherein the refractive index is, in said wavelength range, between the refractive index of a lightly calcined alumina and the refractive index of a strongly calcined alumina; b) preparing a slide for observation of said mixture in said image analysis device, said mixture being illuminated by stable polychromatic radiation compatible with said spectral analysis window; c) receiving an image by the camera and processing a signal resulting in the definition of an image composed of a given number of pixels with three calorimetric components; and d) statistically processing said pixels using their calorimetric components and determining the calcination degree and the homogeneity of the calcination.