The Rotoform 4G system is the latest generation of a system first introduced in 1980 and now widely recognized as the standard solution for granulating a wide range of chemical melts including sulfur, waxes, resins, and agrochemicals. Sandvik has redesigned and reengineered a number of key system functions to deliver increased availability, higher productivity, and improved product quality. System enhancements include a redesigned refeed bar that simplifies operation and improves product quality, a lifting device to streamline servicing, and new bearing units that reduce maintenance requirements. The overall principle remains the same, with a one-step melt-to-solid granulation process delivering consistently sized, free-flowing, dust-free pastilles. Molten product is fed onto a continuously running steel belt in the form of droplets. These are solidified by means of cooling water sprayed against the underside of the belt. This indirect cooling is not only highly efficient but also means no risk of cross-contamination between product and cooling water.
Sandvik Process Systems, Totowa, NJ 973-790-1600 www.processsystems.sandvik.com