As a matter of fact, the Rotary drum dryer is the device that is used to heat and dry the materials. Rotary drying machine is generally applicable to granular materials and it can be also used for the drying of some part of sticky pasty materials or the materials with high water content. Rotary dryers are commonly used to dry sand, slag, slime and so on. What is more, the drying machine is one of the drying apparatus typically used in the cement plants, namely, cement rotating dryer. And Do You Care for Drying Speed of Rotary Dryer Machine?
CHINA Dryer in the process of drying materials, according to the speed of change can be divided into four stages: stage of preheating, constant speed stage, the stage of slow down and material reaches a certain balance under the condition of the water content of the stage. Preheat phase of China dryer: first is the problem of drying is very low, when material come into contact with hot air, hot air and water temperature, the temperature of the material first to water gasification temperature, this period of time is called preheat phase.This stage is characterized by material from tipping point to a certain value, time is very short.
The constant speed stage of rotary drying: with heat passed on, increasing water and material on the surface of the problem, but because the surface of the water vapor pressure of involvement into the air gasification diffusion, will make the material on the surface of the problem.Internal moisture evaporation, water on the surface of the material will continue as the surface flow, the surface still keep humidity, drying speed will not change.This phase is characterized by water gasification material, material of the inner surface of the water to the diffusion speed is very fast, keep wet material surface, drying speed is constant and has a maximum value.
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limestone dryer: http://www.china-cementmill.com/pp/dryer.html
