Intensification of vibration mixing of particulate solids by means of multi-layer loading of components

Abstract : The objective of the study is to show how initial distribution of dissimilar particulate components influences the mixing time and mixture quality. The dissimilar components have a tendency to segregate in one another, and it is impossible to achieve the perfect mixture of them in industrial settings. Nevertheless, the situation can be improved if the components are loaded as a sequence of several sandwiches, each of these sandwiches containing layers of components that are proportional to their share in the mixture. In this case, a sort of pre-mixing occurs while still at the loading stage – which allows reducing the optimum mixing time and increasing the homogeneity of the mixture. The theory of Markov chains was used to simulate the mixing kinetics. It is shown that the number of loaded sandwiches has a very strong influence on the process efficiency. A loading device that can effectively realize multi-layer loading is proposed. The mixing kinetics for ternary mixture of glass beads was investigated experimentally at a lab scale vibration mixer. A one-time loading and a two-sandwich loading were compared. It was shown that the optimum mixing time and non-homogeneity of the mixture were reduced by half in the latter case.
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Vadim Mizonov, Ivan Balagurov, Henri Berthiaux, Cendrine Gatumel. Intensification of vibration mixing of particulate solids by means of multi-layer loading of components. Advanced Powder Technology, Elsevier, 2017, 28 (11), p.3049-3055. ⟨10.1016/j.apt.2017.09.016⟩. ⟨hal-01630211⟩

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