METHOD OF DETERMINING COEFFICIENT OF HETEROGENEITY OF MIXTURE OF HARD-TO-SEPARATE GRANULAR MATERIALS Russian patent published in 2014 - IPC G01N1/28 G01N11/00 G06T7/60 

FIELD: chemistry.

SUBSTANCE: method of determining the coefficient of heterogeneity of a mixture of hard-to-separate granular materials involves determining the number of samples, the minimum allowable weight of a sample, collecting samples of the mixture and components thereof. The samples are distributed in a uniform layer on a smooth surface and photographed. Pixel-by-pixel analysis of images of miscible components is performed to obtain histograms of distribution of pixels of the image on shades of gray with respect to the total number thereof, followed by determination of the threshold shade. Concentration values of the key component in samples of the mixture are then determined as a ratio of the number of pixels corresponding thereto to the total number of pixels of the image of the sample and the coefficient of heterogeneity of the mixture is then calculated. When calculating the value of the threshold shade, coordinates of the centroids of areas of the histograms of distribution of pixels of the components of the mixture are found and the value corresponding to the abscissa of the middle of the section between the centroids of the areas of the histograms is assigned the threshold shade.

EFFECT: simple and accurate method of determining the coefficient of heterogeneity of a mixture of hard-to-separate components with minimum time consumption.

1 dwg