PVC, if spray dried, is normally milled using air classifier mills - such as Atritor DCM which is capable of cutting the product typically down to average particle sizes (d50) between 3.5 to 10um with the majority of particles less than 60 microns, depending on the application of the end product. Atritor has also carried out simultaneous drying and milling (de-agglomeration) tests on dewatered PVC suspensions (press cake) - indications are that, if the dewatering stage can be improved, energy savings for simultaneous drying and controlled de-agglomeration are considerable. Atritor Cell Mill-Dryer technology also incorporates patented slurry spray injection so that slurries or suspensions can be dried, de-agglomerated and classified simultaneously. ■