Abstract: A separator for separating fractions of granular material particularly for use in an interparticle crushing product bed comminution press including an outer conically shaped chamber with means for receiving air and the product to be comminuted at the lower end of the chamber, an inner conical chamber, a second coarse grits outlet leading from the inner conical chamber, a first coarse grits outlet leading from the outer conical chamber, a rotor at the upper end of the inner conical chamber having turbo elements thereon, baffles surrounding the turbo elements, and a fine products discharge from the upper end of the inner chamber with the coarse grits discharge from the outer chamber led back to the inlet of a high pressure interparticle crushing roller mill and the fine grits material discharged from the inner chamber led to a tubular mill.