Search academic texts

Information × Registration Number 0226U002917, (0120U101182) , R & D reports Title drying perlite process popup.stage_title Кінцевий Head Novokhat Oleh Anatoliiovych, Registration Date 10-03-2026 Organization National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" popup.description1 Establishment of kinetic regularities of the perlite drying process, first of all by the thermo-radiation method. popup.description2 The work is devoted to the study of intensification of perlite drying using infrared radiation energy. The current state of the problem of perlite drying, its properties, existing drying methods, and technological process schemes were analyzed. The absence of data in the scientific literature on radiation drying of perlite is demonstrated, which substantiates the relevance of the research and the prospects for implementing this method in Ukraine. Based on a physical model, theoretical studies of perlite drying under the action of infrared radiation were carried out. It was established that when radiation passes through a layer of wet material, heat is generated, the intensity of which decreases along the direction of propagation, forming a temperature gradient within the layer. Heat removal occurs mainly due to convection and the removal of water vapor. A mathematical model of the process was developed. Based on the results of modeling and experimental studies, drying curves, temperature–time dependencies, and drying rate versus moisture content relationships were obtained. It was found that increasing the heat flux density intensifies drying in the first period; however, excessive heat flux leads to overheating of the material. It was shown that increasing the layer thickness reduces the drying rate and increases the process duration, while the initial moisture content mainly affects the total drying time. The influence of the perlite fraction size was also investigated. Technical solutions for a drying unit and recommendations for combining radiation, convective, and filtration drying methods are proposed. The obtained regularities are consistent with the kinetics of bischofite drying, which allows the results to be extended to other crystalline bulk materials. Product Description popup.authors Oleh A. Novokhat popup.nrat_date 2026-03-10 Close