A typical sequence of the batch cycle for a batch basket centrifuge encompasses feeding,rnwashing, deliquoring, cake discharge, and basket cleaning. Feeding is the limiting step (I.e. longestrntime) in the entire batch cycle for feed material that forms slow-filtering cake. This paper discussesrnand models the mechanism of feeding a batch-basket centrifuge, which involves filling the basket andrnallowing the cake to build up by sedimentation with liquid filtering through the cake. Feeding isrntemporary shut-off when the liquid pool reaches the maximum level to allow filtration to catch up.rnWhen the standing liquid pool is reduced to a lower level feeding is resumed again. This process isrnrepeated several times until the cake builds up to the desired thickness. Using the model the totalrnfeeding time can be reduced by optimizing the operating parameters tailored to the characteristics ofrna given process application resulting in higher “capacity” for the basket centrifuge. Thesernparameters are the liquid viscosity that depends on the process temperature, rotational speed,rnmaximum and minimum pool level or mass of the basket load during feeding and drainage, andrnvolumetric feed rate. Other physical properties that affect filtration are the cake permeability andrnthe filter media/cake heel resistance.
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