| 摘要 |
<p>The invention relates to a process for producing particulate products from a slurry. The process is carried out in a virtual bed apparatus which includes a hollow body (10) within the lower section (12) of which a fluidized bed (32) of particles can be formed by a gaseous medium displaced through the hollow body. The slurry is fed onto the fluidized bed (32) of particles and by effective drying of the slurry, either by using high temperature steam as the gaseous medium or via a heat exchanger arrangement (36), the growth of particles in an 'onion layer' fashion occurs. This growth of particles occurs either by slurry particles attaching to existing particles or by the equivalent growth of new dry slurry particles that do not attach to existing particles. Particles grown to a desired size are then discharged from the hollow body in a controlled fashion.</p> |
