Limestone pellets produced in a disc pelletizer (disc pelletiser, pan granulator) Glass Processing in the FEECO Innovation Center, Pelletized (Pelletised) Glass Produced in a Disc Pelletizer (Disc Pelletiser, Pan Granulator) Batch Rotary Kiln Testing to Detailed Kiln Design. Real-time Moisture Analysis. Resource of the Week Innovation Center Page Click the image below to view our infographic on limestone soil amendments. Though many limestone producers still rely on the disc pelletizing system for processing limestone, the advantages that the addition of a pin mixer can add to the process have proven to be highly beneficial. FEECO has been custom engineering pin mixers for over 60 years. Disc Pelletizers. FEECOs Disc Pelletizers (also known as pan granulators) are the equipment of choice for converting powdered materials into uniform, round pellets. Disc pelletizers utilize a non-pressure (tumble growth) approach to agglomeration and work by tumbling material on a rotating disc, with a binding agent and feedstock being ...