Logvynenko D. Development and research of the methods for ceramic bricks drying and firing intensifying

The processes of heat and mass transfer in drying and firing of ceramic bricks. Creation of scientific and technical principles of improving the efficiency of tunnel kilns, their productivity and reducing of specific fuel consumption. The methods of empirical and theoretical levels of study are used. The method of empirical research is measurement of physical quantities during experiments on laboratory equipment and industrial conditions. The method of theoretical research is mathematical analysis of drying and heating processes of single ceramic brick. The theory of the kinetics of drying and firing of ceramic bricks in the gas dynamics of flow of hot air and the technology of its production are received further development. The kinetics of convective drying, rapid heating and firing of ceramic bricks are studied. The new information on the impact of permissible heating rate, duration of firing, final firing temperature, set temperature in tunnel furnace and initial relative humidity on quality of roasted complete and hollow ceramic bricks are experimentally obtained. A new effective way of firing of ceramic bricks and equipment for its implementation is developed and implemented. 21-25% reducing of specific fuel consumption, increasing of tunnel kiln productivity up to 20% and the percentage of suitable products up to 97.5% are obtained. Sphere of use is the building materials industry.