This paper provides a cross discipline critical review of the various efforts undertaken to assess the detachment mechanisms in a liquid fluidised bed. Points of agreement as well as those of divergence are stressed out, and attempts are made to clarify the discrepancies frequently observed. An experimental work aiming at the removal of clay particles from the surface of fine salt grains is presented, and its results are treated in the light of the preceded discussion. The influence of velocity gradients, shear stress and particle attrition on detachment are discussed. A realistic model is provided for the prediction of attrition in particle beds during fluidisation.
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