Air-jet mill and associated pregrinding apparatus for comminuating solid materials

摘要

PCT No. PCT/HU86/00020 Sec. 371 Date Jan. 29, 1987 Sec. 102(e) Date Jan. 29, 1987 PCT Filed Apr. 3, 1986 PCT Pub. No. WO86/05717 PCT Pub. Date Oct. 9, 1986.An air-jet mill provided with pregrinding chambers and inner sizer suitable for fine grinding (below 10 mu ), for cryogenic grinding and also for surface treatment during grinding of hard, elastic and/or thermoplastic materials. During operation there are no moving components to be exposed to heavy wear, and an inner sizer, forming an integral part of the grinding space, uses the energy left after grinding in the system to enable a sharp sizing or separation of fine fractions.