Mikum drum machineExperimental Procedure:

1. Carefully place one of the samples into the cleaned drum, press the drum cover tightly, lift the drum, stop the drum after 100 revolutions, and let it stand for 1-2 minutes. After the dust falls, open the drum cover, pour out the coke inside the drum, carefully clean it, and collect the coke powder on the drum cover inside the drum.

2. Sift the coke produced by the drum using circular hole sieves with diameters of 25mm and 10mm respectively (with the 25mm portion being perforated). During screening, the amount of coke entering each screening should not exceed 15 kilograms. It is necessary to strive for a clean screening while preventing excessive force from crushing the coke due to impact.

3. Weigh the mass of each coke particle larger than 25mm, 25-10mm, and smaller than 10mm separately (accurate to 0.1 kg), and the difference between the total sum and the mass of coke entering the drum is the loss amount. When the loss amount is ≥ 0.3 kg, the test is invalid, and when it is ＜ 0.3 kg, it is included in the first level of less than 10mm.

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