Definition of coal fines :-
(i) Coal fines are typically generated in the crushing and drying processes during coal preparation prior to combustion in utility boilers.
(ii) When coal is extracted from the ground, it is necessary to separate the coal material from sand, dirt, stones, rocks and other non-coal material. This “washing” process, typically utilizing water, is performed by specialized equipment referred to as “coal preparation plants”. “Coal Fines” are the small particles of coal material that are “washed-off” the coal during the preparation plant process.
In view of above, the coal fines are something that is generated during process/manufacture/ extraction of coal. Hence, question of coal fines generated during use of COAL or separation from coal does not arise at all. Coal fines comes into existence before COAL.
In youe case, what is segregated/separated from coal is nothing but coal.. It is just like Bettle nuts, where in the hard/medium/small pieces of Nuts are segregated/separated from the small particles of bettle nuts, however resulting in no manufacturing activity at all.