Abstract
A considerable number of bulk particulate materials that require conveyance are potentially degradable. By virtue of the nature of the conveying process, requiring relatively high velocities, if friable materials are to be conveyed, then considerable damage can occur to any material being conveyed. As a consequence there is always some concern about using pneumatic conveying systems for such materials. There are many variables in the process, related to both the material to be conveyed and the conveying conditions, and a review of small-scale test facility data are presented to illustrate the potential influence of such variables. Particulate material, particle size, velocity, impact angle, and surface material are all considered. Full-scale conveying data are also presented for a range of materials to show the order of magnitude of the problem. Consequent operational problems, such as the potential for an explosion, are also highlighted. The specific problem of particle melting, in the case of plastic-type particulate materials, is also considered.
Published Version
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