1) The viscosity of the material. The viscosity of the material varies with its moisture content, which can cause the material to aggregate into blocks and adhere to the cylinder. After drying, it is easy to adhere to the dust collector and pipe wall. Pneumatic vibration and crushing devices can be used.

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2) The allowable temperature of the material. The allowable temperature is the temperature that the material can withstand. Beyond this temperature, the potency of the material will change, decompose, or discolor.

3) Bulk density of materials The material per unit volume is called bulk density. Due to the fact that the material is a mixture of dry and wet materials, dry materials are often in the form of particles, powders, or solid blocks, and the gaps between dry material particles vary with the moisture content in the material. There is a significant difference in bulk density between raw wet materials and dry materials, and attention should be paid when choosing a dryer.

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4) When stacking granular or powdered materials, when the angle between the inclined surface of the material pile and the bottom surface increases to a certain angle, the phenomenon of lateral material sliding down will occur. The angle between the inclined surface where the material slides and the bottom surface is called the sliding angle of the material. The slip angle is related to material composition, moisture content, particle size, and viscosity. When choosing a double cone dryer, you can refer to the slip angle of the material and select the angle size of the cone