Vibrating, fluid bed dryer is used to remove the surface and internal moisture from pre-crushed pumice. The ore enters the system via belt conveyor and feeds the vibrating fluid bed dryer. Air heated by natural gas is processed through the fluid bed dryer, removing the moisture. Moisture laden gas is sent to a dust collector to remove any entrained fines before the gas is released into the atmosphere. The dried ore is then discharged from the dryer onto a conveyor and sent to a storage silo.
The vibrating fluid bed dryer uses a natural frequency drive system with a 5 HP vibrating motor for excitation of the drive system. Normal flow rate is 10 tons per hour and moisture in is 10% and out is 0.5%. The dryer is insulated and includes a complete control system to control the gas temperature in the dryer and to provide flame safe guard protection to the gas burner.