High Viscosity Mixer Designs and Applications（高粘度混合机的设计和应用）.pdf

High Viscosity Mixer Designs and Applications A White Paper Prepared By Charles Ross Son Company High Viscosity Mixer Designs and Applications Abstract Efficient mixing of viscous applications takes into consideration, among many other factors, viscosity and level of shear. It is common for batch materials to exhibit fluctuating rheology during different stages of mixing and demand varying shear intensity depending on ingredient additions or temperature limits. The appropriate mixing equipment must therefore have the ability to control flow pattern and fine tune shear input at any point of the mix cycle. Achieving this basic requirement is more straightforward in some applications than others, but even the complex ones can now be processed at better efficiencies due to new developments in high viscosity mixer designs. The mixing equipment and applications discussed in this paper are based on the collective experience of Ross mixing experts. For over 150 years, Ross has partnered with thousands of companies making high viscosity products for almost all uses and applications. The aim of this paper is to provide a brief compilation of technical and practical information on high viscosity mixing and how specific process needs can be successfully met through the efficient use of specialty mixing equipment. Introduction Anyone who has worked with materials over 100,000 cP knows that viscosity by and in itself presents a distinct mixing challenge. These products require sufficient torque and thorough agitation to achieve a homogenous state. In reality, this requirement is often compounded by other constraints such as the presence of shear- or heat-sensitive raw materials, hard-to-disperse fibers, powders that form tough agglomerates, fragile or abrasive components, highly volatile solvents, or batch material that is very sticky, dense, dilatant, etc. The suitable mixing system must typically tackle one