期刊名称：Eastern-European Journal of Enterprise Technologies
印刷版ISSN：1729-3774
电子版ISSN：1729-4061
出版年度：2017
卷号：5
期号：12
页码：58-64
DOI：10.15587/1729-4061.2017.111996
语种：English
出版社：PC Technology Center
摘要：We report results of research into processes of formation of porous structure by the method of thermal bloating of the gel-like mixture of raw materials. Regularities of the course of physical-chemical transformations are considered in the material when it is heated; as a result, we established the initial water content in the raw mixture, optimal for the formation of xerogel, and the residual water content in gel, sufficient for effective bloating. We proposed the optimized composition of the raw mixture that employs maximally permissible amount of ash as a mineral filler; the thermal modes of bloating are studied. Based on the data obtained, a new technology for the production of porous thermal insulation materials is created. New porous thermal insulation materials were obtained using soluble glass as a binding component; foaming agent; regulator of hardening rate of the mixture. The basic thermophysical properties were determined.A study of physicochemical phenomena occurring during thermal bloating of analogous compositions allowed us to predict the course of the processes in the case of using additional chemical elements and techniques. It was established that ash can be effectively utilized when creating an efficient raw material mixture. The results obtained could be useful for the production of effective porous thermal insulation materials for various purposes. In addition, the task is resolved on the disposal of ash from coal-based thermal power plants.
