F - Mech Eng,Light,Heat,Weapons – 26 – B
Patent
F - Mech Eng,Light,Heat,Weapons
26
B
F26B 7/00 (2006.01) B02C 17/16 (2006.01) B02C 21/00 (2006.01) B02C 23/24 (2006.01) F26B 3/20 (2006.01) F26B 11/14 (2006.01)
Patent
CA 2148398
An apparatus and a process for drying a suspension of a finely divided particulate solid material to produce the solid material in a substantially dry and unagglomerated form. The apparatus comprises a grinding chamber (1) containing a particulate grinding medium (12), means (21) for introducing a suspension of the particulate solid material into the grinding chamber (1) and an impeller (8, 9) rotating in the grinding chamber (1). The grinding chamber (1) has a perforated base (3) through which a heated gas is introduced to provide an upward flow of gas through the grinding chamber (1) and through the grinding medium (12). As the particulate solid material is dried, fine particles of the material are carried upwards in the upflow of gas through the grinding chamber (1) and may then be classified by classifying means (25) which separate the substantially dry product into a relatively fine fraction and a relatively coarse fraction. Downstream of the grinding chamber and of the classifying means (25), if provided, are filter means which separate the solid particles from the suspended gas. The filter means may comprise one or more cyclones (30) and/or a bag filter assembly
Ecc International Limited
Sim & Mcburney
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