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Silo-type mixer

 

Mixing system within a silo-like vessel – the focus is on process intensity. A silo mixer is primarily a technologically sophisticated mixer for bulk materials. It resembles a silo in appearance and is equipped with mixing tools that are capable of homogenising bulk materials sufficiently. It differs from a mixing silo, which primarily serves as a storage container and whose secondary function is to approximate the homogenisation of the silo contents.

 

Technical features of the silo mixer:

  • The mixing process takes place throughout the entire product volume.
  • Often suitable for both continuous and discontinuous operation.

amixon® large mixers – precision on an industrial scale. amixon® covers a wide range of applications with its vertical mixing systems:

  1. Single-shaft mixers (up to 50 m³)
  2. Cone mixers (up to 60 m³)
  3. Gyraton® (up to 100 m³)

 

 

These mixers offer:

  • Optimal homogeneity regardless of product properties (e.g. moist, dry, poorly flowing)
  • Reliable discharge – even with difficult flow properties
  • Combined functions: storage, mixing and discharge

A mixing silo is primarily used for the temporary storage of bulk materials that occasionally need to be homogenised. The integrated mixing function is designed less to achieve complete mixing than to compensate for differences that occur during storage.

Typical applications

  • Coarse compensation of material stratification
  • Coarse mixing of similar batches before further processing

Technical equipment

  • Often equipped with pneumatic, static or low-motion components, e.g. ventilation systems, screw conveyors: Ventilation systems, screw conveyors, deflector plates

Limitations of the mixing silo

  • Only parts of the material are actively mixed.
  • The achievable mixing quality is poor to moderate at best.
  • It is sensitive to changes in product behaviour (e.g. moisture, storage time, grain size distribution).
  • The mixing process is highly dependent on the flowability of the material.
  • In this respect, the mixing quality cannot be improved by extending the mixing time.

 

The Gyraton® - silo mixer, a multifunctional process system

The Gyraton® mixer combines the properties of both concepts: it can be used as a storage silo, precision mixer or reaction apparatus (e.g. as a dryer, fermenter or synthesis reactor).

Special features of the Gyraton® silo mixer:

  • High-precision mixing quality with extremely low drive power
  • Slow tool movement without loss of quality – ideal for large batches
  • High reliability even with very poorly flowing, heterogeneous powders

This efficiency makes the Gyraton® a particularly economical solution in the field of bulk solids processing.