ATBECHDEFRITLILUNLSE0140613EUROPEAN PATENT APPLICATIONA319860430EP8430689219841010832720119831011GB1986043019861819850508198519 6B 02C 19/00 A 6B 02C 23:00 BenApparatus for and method of obtaining a comminuted product from a solid feed materialfrAppareil et méthode permettant d'obtenir un produit broyé à partir d'un matériau d'alimentation solidedeVorrichtung und Verfahren zur Erzeugung eines zerkleinerten Produktes aus einem festen AusgangsmaterialCROFT IMPRESA LIMITEDHill, Henry EdwardMurray, Alistair ScottATBECHDEFRITLILUNLSE19860430198618

An apparatus for obtaining a comminuted "fines" product from a solid feed material, a large proportion of the particles of which are greater than 1 cm, comprises a housing having a lower region forming a crusher (10) and an upper region forming a classifier (11). There is an inlet for the solid feed material leading to a hopper (22) from whence feed material passes to a rotor (13) which causes the material to be flung centrifugally outwards in the crushing chamber (23) where it is comminuted. As a result of movement of the rotor, there is a predominantly upward air flow (F) from the crushing chamber (23) to the classifier (11). This air flow entrains a high proportion of "fines" which can be classified, in the classifier (11) using vanes (21), and collected.

The apparatus is capable of producing an output product having a very high proportion of "fines" from even very abrasive feed material with particles of a size up to 5cm.