Enhanced gravity separation devices (centrifuges) have been patented for over a century but were impractical until recently. The physical laws behind the concept were well understood but engineering had to catch up with the science. This included the development of abrasion resistant materials, the improved design of rotating equipment that allowed higher RPM, and a good understanding of slurry flow, rheology, and the effects of particle shape. Only in the last decade has engineering entered the dawn of enhanced gravity separation. The more we learn, the more we realize how little we know. A parallel can be found in the history of the hydrocyclone which, although in widespread use for decades, experienced an upsurge of study and improvement after 1960 and which continues to receive attention in the literature. Mineral processing technology has advanced across the boards recently and enhanced gravity separation has been part of this evolution. A few things are now known with some certainty.
While units have previously been defined by diameter, capacity is more a function of surface area. Two units of close diameter must be assessed by rotor surface for comparison. Within the Falcon SB product line from 104 to 965 mm (4” to 38”) diameter, ….Read more