Helical mixing tool

See the image on the left. A simple mixing spiral in a vertical mixer.

Helical mixing blades are mixing blades designed in a screw- or helix-like shape, arranged along a shaft. They convey the product upwards and generate a defined shear flow. In the process, the material being mixed is spatially redistributed without being subjected to excessive turbulence.

In bulk solids and process engineering, spiral mixing blades are used to handle powders, granules and mixtures with particular care. The particles are guided upwards along the container wall and flow back downwards in the centre or around the shaft. This results in a three-dimensional mixing of the entire product volume.

Helical mixing tools operate in an energy-efficient and low-dust manner. They prevent high local shear forces and reduce abrasion and segregation. This is particularly beneficial for delicate, fragile or dusty products.

Thanks to their geometry, helical mixing tools also promote an even flow through the mixing chamber. Dead spaces are minimised. At the same time, contact between the product and heated or cooled chamber walls is optimised. This enhances heat transfer, drying and temperature control.

Helical mixing blades are frequently used in vertical mixers, mixing dryers and reactors. They are a key component for ensuring reproducible mixing processes that deliver high product quality and mixing efficiency.