... materials, chemistry, food and fertilizer, etc. This rotary drying machine comes with thermocouples on the feeding and discharging device to control the ... % of energy and increase 10-15% of productivity compared with common dryers.Sand Rotary Dryer Working Principle: The auto-combustion ... air, we can reduce the shipping cost for our clients.At Hengxing, we can provide full specifications of large and ...