Abstract
AbstractThe chapter considers the problem of energy and resources efficiency optimization in the drying process of pelletized industrial waste from apatite-nepheline ores as a discrete dynamic programming problem when the discretization for the stay time of pellets in the drying zone of a conveyor-type indurating machine corresponds to the length of individual vacuum chambers. The constraints on the vector of control actions and the state variables of the drying process are taken into account due to the technical feasibilities of the indurating machine and the technological conditions for the drying process. The optimal values, in terms of energy and resource efficiency, for the initial moisture content and the pellets radius, the speed for the conveyor of the indurating machine were identified. The energy and resource-efficient drying conditions for a conveyor-type indurating machine operating with the pelletized waste of apatite-nepheline ores are reasonably obtained, at a known height and fractional composition of the backfill they are provided by: heating the multilayer mass to the maximum possible temperature with the highest possible speed; keeping the material at this temperature for the time necessary to complete the drying process. The obtained results made it possible to automatize the decision making procedure for the selection of a technological operating condition in the chemical and power engineering system of apatite-nepheline ores waste processing at mining and processing plants.KeywordsOptimizationDiscrete dynamic programmingEnergy and resource efficiencyDryingPelletsIndurating machineIndustrial waste
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