Separation of Fine-Particle Slurries: Effect of Centrifugal Acceleration, Particle Interaction and Concentration

Unit processes using centrifugal fields are often applied for separation, deliquoring and classification of fine grained materials. Modeling of these processes requires information about the separation behavior of suspensions to be processes. To this end direct measurements in centrifuges are obligatory. Moreover, these measurements have to gather kinetic information as function of the processing conditions, particle interaction and particle concentration. As a first step in this direction the separation behavior of quartz (stable dispersions) and limestone suspensions (moderately and strongly flocculated) was investigated as a function of solid concentration and centrifugal acceleration using a multisampling analytical photocentrifuge. Particle interactions arte characterized by the packing density determined under defined conditions and by its variations under alternating centrifugal load. .......

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