►Three Drum Dryer Introduction:
Three drum rotary dryer is mainly used for drying a certain humidity and size of granular materials,such as yellow sand used in dry powder and mortar,various specifications of sand used in a foundry industry blast,furnace slag used in building materials and cement industry,clay in a small size,small materials which have no chemical changes,resists high temperature and are with flyblown dust,used in chemical industry.In according with the request of materials and water in different industries,water in materials which are dried can be blow 1-0.5%.
►Working Principle:
1.Materials will be constantly lifted up by lifting boards,and scattered in spiral type to make hot exchange.
2.And then,material will be moved to middle layer of drum for countercurrent drying,and materials in middle layer of drum will be constantly lifted up by lifting  boards.Materials in middle layer of drum can both full absorb heat generated by inner drum layer,and heat generated by middle drum dryer,while extend drying time,so materials reached its driest state in this process.
3.Materials can move to the outer drum dryer from the middle drum layer,materials reached the drying effect will be discharged fast along with hot air,while wet materials have not meet the drying effect can't move quickly due to high weight,so wet materials can get adequate drying to reach drying effect thus achieve to complete the drying process.