Abstract
On the basis of measurements of the destruction time of a coal sediment column structure, which were described earlier, a further and more detailed analysis of the results of these measurements was carried out. The radius of the contact plane between coal particles in the studied liquids was calculated. The values of the radius decreased with increasing length of the hydrocarbon chain of both alkanes and alcohols. Next, the values of the attachment force of two coal particles through a liquid were calculated and they increased with increasing length of the hydrocarbon chain of both liquids. We have found a linear relationship between reciprocal of the destruction time and the difference in the detachment and attachment forces. From this relationship we concluded that the work of adhesion of the liquid to the coal surface also influenced the attachment force between coal particles through the liquid.
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