Abstract
Investigation of the dosing quality of the impurity component at low loading conditions of the experimental trier and low initial clogging with a long impurity using three distribution boxes with dimensions: 600 × 14 × 13 mm; 600×24×13 mm; 600×24×21 mm are made. Dosing quality indicators - the standard deviation and the coefficient of variation for single, pair, triple, quadruple and five distributing boxes, characterizing the required linear density of the distribution of the impurity component on the feeder belt, have been established. It has been established that the use of these boxes provides high dosing stability. The coefficient of variation under different conditions of their loading does not exceed 4.75%. Filling boxes with dimensions of 600×14×13 mm with shaking of impurities provides a higher quality of dosing: the standard deviation is lower by 18.9 - 47.32%, the coefficient of variation is by 23.96 - 49.45% for different frequency of unloading boxes at formation of the linear density of the impurity layer on the tape. A number of model compositions of grain mixtures, providing for the supply of 1.2 t / h, the variability of the initial contamination in the range of 0.46 - 6.65%; for the supply of 1.83 t/h, the range of initial contamination is 0.3 - 4.3%; for the supply of 2.45 t/h, the range of initial contamination is 0.22 - 3.25%; for the supply of 3.07 t/h, the range of initial contamination is 0.18 - 2.6%; for the supply of 3.71 t/h, the range of initial contamination is 0.15 - 2.15%; for the supply of 4.35 t/h, the range of initial contamination is 0.125 - 1.8%. established on the basis of the performed calculations. Distribution boxes of small cross section provide 20 interval values with a minimum step for each range of initial contamination, which allows you to qualitatively control the experiment when using a grain mixture with low values of contamination of the grain mixture and productivity of the trier.
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