Pneumatic Mixer with a Spiral Energy-Carrying Tube

This article explores blending equipment and reveals advantages and disadvantages of blenders for production of dry building mixes. This analysis results in highlighting a pneumatic blender as one of the most challenging and poorly explored blenders to blend dry mixes. Such blenders fully comply with ecological and production regulations, do not deal any harm to employee’s health, and its technical characteristics are in no way worse than those of mechanical blenders. After examining challenging directions of their improvement we offer a new design of such a pneumatic blender, which aims to enhance the quality of final product through increasing product uniformity by intensifying the blending process. Its main concept is based on blending dry building mixes in air turbulence flow. Additionally, this article deals with the method of calculation design and technological parameters of such a pneumatic blender. A graphical comparison of experimental and theoretical dependences of the coefficient of inhomogeneity on time is presented. Main parameters, that define blender’s geometric and utility features, are pressure, gas consumption, material lifting range. The results of this article can be used in the design of pneumatic mixers for mixing dry building mixtures, as well as in the educational process of bachelors and masters.