Research on the effect of amplitude on separation law of compound dry separator

In order to study the effect of amplitude on separation law of compound dry separator,using the compound dry separator model separating the coal sample with the size fraction from 25 mm-0 mm taken from South Africa.The separation tests were done under amplitudes of 2.6,2.8,3.0,3.2 and 3.4 mm and at same time the other separation parameters were not changed.The test result shows that the clean coal yield decreased with increase of amplitude,but the tailings yield was just the reverse.The change of amplitude also has big effect on ash content of clean coal,so combined with the three index of absolute value of ash reduction,ratio of ash reduction and K value,the best separation result obtained under the amplitude of 3.0 mm.