Influence of Difference in Density of Solids on Mixing Efficiency in the Designed Static Mixer

A new design concept of universal set-up for the examination of mixing process of solids using elements of static mixer has been proposed. The designed mixer allows mixing of solids in the measuring range dm ≤ 17 mm. Owing to the complexity of the construction, it is possible to apply many combinations of settings. The study on mixing efficiency for two components differing in density has been performed. The following granular materials of different size of particle were used: polypropylene, quartz sand, silicon carbide and aloxide. It was shown that the increase in the difference between densities of mixed solids causes a deterioration of the final effect of studied process. Selected construction systems were suitable for mixing of granular solids of comparable density. Depending on applied mixing elements and their arrangement, a satisfactory mixing ratio of solids can be achieved. The efficiency of mixing process depends primarily on the construction type of selected mixing element—segment. To ensure a satisfactory mixing efficiency for other systems, it is necessary to apply new constructions of mixing segments.