This machine is mainly used in ore selecting, building materials, metallurgy and chemicals to dry the materials with certain moisture and size. The rotary drier has a strong adaptability which can dry many kinds of materials with a simple operation method and security trait, so it is widely used. good quality ,durable and steady machineDescription for sand dryer :1. price cheap , same capacity ,the price is cheaper than Rotary drum dryer .2.space small , why this dryer named : three roller dryer , Eg : model 2X4m , equal to 12m roller , outside rollerpack two roller , plz check picture ,you can understand what I meaning .3. Energy saving and high heat efficiency .4. Easy operation and Reliability