Abstract
In this article, gravity studies of coal samples from the Vostochny open-pit of the Tataurovskoye deposit are carried out. A diagram of the ash content of the samples according to the density index of the material is shown, the ash content of the samples is shown graphically according to the particle size. Formulas are given for calculating the average ash content, the total yield of floated and settled fractions. Also, studies and calculations of samples of each density were carried out depending on the particle size class. As a result of calculating the yield of the fraction for each density, studies on the washability of samples were carried out and the curves of washability are graphically presented. According to GOST, the sample washable category was identified.
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