cyclones tend to be used to stop large particles clogging /filling the extractor unit, fine material tends to pass through the cyclone and into the filter bay/vac unit,, with coarse material dropping out into a hopper.. as you don't have coarse material I don't think it would work, but could be totally wrong with the right cyclone design.

Hope your extraction system has sufficient earthing to prevent static build up....if it is plastic I would be looking to run a bare metal strip in the ducting and earthing that