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Powdered Materials Flowability in hoppers and under Gravitational Field

Han Zhongqi  
In constant cement plant operation, bulk cement storage and supply is the essential point of the production. There many hoppers and bins deviced in cement plants, such as feed hoppers for raw mill,cement mill and coal mill, intermediate bins and large silos for raw meal and cement etc. However, problems will occur during bulk materials storage, e.g., build -up, arching, segregation, uneven draw-off and powder spray etc. This paper will discuss the present research of the theory of powder pressure and static wall pressure of gravitional force, the relationship of common faults and bulk materials flowability.
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