Certain properties of humid granular materials
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Technical University of Lodz
Publication date: 2008-01-01
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Piotr Wodziński   

Technical University of Lodz, Faculty of Process and Environmental Engineering, Department of Process Equipment, Institute of Material Classification
Physicochem. Probl. Miner. Process. 2008;42(1):195–210
This study deals with the properties of humid granular materials. The processes involving these materials are very frequently encountered under industrial conditions because in fact the processing of completely dry materials does not exist. Water vapour is present in the air under any conditions which means a certain amount of moisture in the granular bed. A general friction coefficient of granular materials has been proposed as contributing to a moisture influence on processing. The friction coefficient constitutes a basic independent variable encompassing an impact of moisture on the behaviour of a humid granular material in the mechanical process. Furthermore, the function of outflow has been proposed as an important analytical-empirical parameter to describe the processing of solids.