Separation characteristics of moist fine coal in a compound dry separator
To improve the efficiency of moist fine coal sorting and classification,a single-factor test of vibration intensity and air velocity was carried out in a compound dry separator to obtain the optimal parameters,and the separating effect of raw coal with different moisture in different separating duration was explored,while the influence of airflow on the separating process of moist fine coal was analyzed.The results show that with the increase of separating duration,the separating effect is obviously improved,and the maximum ash segregation degree is up to 12.05.The test coal samples reach the best separation effect at the air velocity of 0.78 m/s,the vibration frequency of 25 Hz,and the amplitude of 3 mm,and the separated products have good dewatering effect at this condition,and the dewatering effect of the concentrate coal is better,the possible deviation E=0.135 g/cm3.And the separated products have good dewatering effect under this condition,and the composite dry sorting can realize the quality enhancement of moist coal.
moist fine coalcompound dry separationash segregation degreedistribution curveresponse surface method
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