Aggregate Sand Dryers Coolers Carrier Vibrating. Sand aggregate dryerscoolers are available as SandAggregate Dryer Only A single hightemperature fluid bed that typically uses 3040 less fuel than a rotary dryer DryerCooler with Recirculation Warm exhaust air from the cooling section is recirculated to the drying zone air heater providing an additional energy savings of 1015 and reducing the ...