Determination of the optimal drying condition during drying of green masonry products

Abstract

Explanation of the drying process is reduced to the establishment of a series theoretical and empirical drying models. Complex processes of simultaneous mass and energy transfer, which are often non-stationary and the distinct nature and properties of the drying material, complicate even more the description of the drying process. The aim of this study is to find a way to short drying time, to find optimal drying conditions, and to preserve good physical and mechanical characteristics of green masonry products. In order to establish optimal, especially "fast drying" process, it is necessary at the beginning of drying to slowly heat the products while relative humidity within the dryer is kept high. Experimental research was performed in the laboratory recirculation dryer. On the base of laboratory optimization tests, drying process of masonry products in industrial conditions was proposed and optimized.