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amixon GmbHamixon GmbH

Silo mixer Gyraton®

The Gyraton® blending silo mixer is a precision mixer. It offers unique advantages in terms of mixing quality, flexibility and economy.

The Gyraton® mixer/ blender becomes all the more interesting the lower the speeds are selected. This means that the drive motor can be very small. With the Gyraton® mixer, the mixing time required by the customer determines the size of the drive motor.

More homogeneous powder and less energy consumption

  • Extremely small drive motor: Gyraton® mixers/ blenders work particularly effectively with low motor power. It is around 10 - 15 % of the power required by a conventional precision mixer. Nevertheless, it homogenizes your mix with high precision. As precise as a precision mixer. The mixing process is extremely gentle.
     
  • Low investment costs: A Gyraton® mixer has a cylindrical mixing chamber and a very compact design. A Gyraton® mixer with a total height of less than 8 m can mix up to 70 m³ of mix. This means that the building can be planned up to 2/3 lower than with a conical silo mixer.
     
  • Energy saving: The reduction in height requires less vertical conveying when filling the mixer. The average service life of amixon® mixers is 30 years. If hundreds of thousands of tons of mix only have to be conveyed 1/3 as high, this means
    • Less wear on the conveyor elements
    • less energy input
    • Less cleaning effort
    • Lower investment costs for the conveyor system
  • The grain structure of the bulk material is retained much better: The shorter conveying route brings further advantages:
    • Significantly better product protection
    • Less heating of the mix
A large Gyraton® mixer is also supplied (almost) ready to use.

A large Gyraton® mixer is also supplied (almost) ready to use.

Fast installation and commissioning

  • Quick installation and commissioning: Gyraton® mixers are designed so that they can be transported horizontally on a low loader. The mixer/ blender is almost completely assembled on delivery. The height of the low-loader including load is usually less than 4 meters. This means that highway bridges in Europe can be passed without any problems.
  • Convenient and safe cleaning: The Gyraton® mixer/ blender is hygienically designed. It can be cleaned both dry and wet. Automatically if desired.
  • Sterile products can also be processed / mixed / even fermented in the Gyraton mixer/ blender
  • Simple inspection: Gyraton® mixers/ blenders have large inspection doors. They are extremely durable. amixon® mixers often have a service life of over 40 years.

The size of the drive motor is determined by the customer depending on the application.

Precision mixers/ blenders, whether vertical or horizontal, are rarely larger than 10 m³. This is due to the specific power requirement. Precision mixers require a minimum speed for the mixing tools. Otherwise they will not mix precisely. The drive motor must then have an output of one hundred kW and more. Precision mixers therefore only require a few minutes of mixing time.

This is exactly what is not expected when homogenizing large batches. Several hours are usually available for mixing large batches. Why spend a lot of money on a service that is not needed? What is needed is the high mixing quality and not the short mixing/ blending time!

The mixing tool of the Gyraton® blender "tumbles and rotates" around the centre of the floor. It describes a cycloid. The mixing tool produces a good mixing effect everywhere. Even at very low speeds. There is no fixed centre of rotation. The axis of symmetry of the mixing chamber always differs from the axis of symmetry of the mixer helix.

The Gyraton® mixer/ blender becomes all the more interesting the lower the speeds are selected. This means that the drive motor can be very small. With the Gyraton® mixer/ blender, the operator determines the required mixing time. This results in the power of the drive motor.

The Gyraton® mixer from amixon® mixes both batchwise and continuously.

The Gyraton® mixer from amixon® mixes both batchwise and continuously.

Was sind die typischen Einsatzgebiete von Gyraton® Mischern?

The Gyraton® mixer is a good solution if the following criteria are met:

  • The batch size is a minimum of 3 m³ and a maximum of 100 m³.
  • The mixed materials are dry powders, pastes or slurries with small and/or large particle diameters.
  • The mixes are free-flowing and/or poor-flowing.
  • There are homogeneous or heterogeneous material compositions.
    • Nanoparticles to coarse flakes and granules.
    • Bulk densities of less than 0.1 kg/dm³ to 3 kg/dm³ are present.
    • e.g. metallic or ceramic powders for powder metallurgy.
  • The mixes solidify if they are not moved.
  • The mixes are highly pure and are processed under inert conditions (lithium hydroxide for active cathode compounds).
  • The parts that come into contact with the mix are ceramic-coated if required.
  • The large mixer mixes sterile goods for fermentation processes.
  • The large mixer should mix the goods in batches; the same mixer should also mix the goods continuously.
  • The batch sizes can vary greatly from 10 % to 100 %.
  • The large mixer should empty itself completely.
  • ......

What options are there for testing the Gyraton® mixer/ blender?

In the technical center  a Gyraton® mixer/ blender with a gross volume of 4.8 m³ is available. It makes sense to carry out tests if your test products are available in sufficient quantities. This is how amixon GmbH determines the necessary data for a reliable extrapolation to larger Gyraton® mixers.

Tests create security and increase knowledge. They reduce residual risks. A joint test day at the technical center in Paderborn is a source of knowledge for both sides. Sometimes it is coincidences or peripheral observations that give rise to valuable ideas for your investment project.

Mixing test in the Gyraton® GM 3000 mixer.

Mixing test in the Gyraton® GM 3000 mixer.

Two amixon® precision mixers. Left Gyraton® type GM, right single-shaft mixer type VM.

Two amixon® precision mixers. Left Gyraton® type GM, right single-shaft mixer type VM.

Two precision mixers in comparison

Vertical mixers/ blenders from amixon® are used worldwide for a wide variety of bulk materials. Up to now, sizes of up to 60 m³ have been produced. The mixers achieve the best mixing results. The two mixers shown are precision mixers. However, the mixer shown on the left can mix at almost any low speed. The mixer shown on the right requires a minimum speed of approx. 4 revolutions per minute.

In this example, the batch volume is 20 m³ in each case. The mixed goods are identical. Both mixers have a diameter of 3.2 m. The peripheral speed of the right-hand mixing tool should not fall below 0.67 m/s. Its drive motor therefore requires a drive power of more than 140 kW. With a Gyraton® mixer, for example, it is only 24 kW.

What would happen if the agitator of the single-shaft mixer (VM) only rotated at 1 rpm?


 
The idea is to reduce the speed by a factor of 4 and increase the mixing time by a factor of 4?

Unfortunately, this compensation is not possible at will. This is where physics sets limits. Only rotation takes place in the center of the mixing room. For mixing, however, it is necessary for the particles to move relative to each other. This is all the more effective the further away the mixed goods are from the center. The speed of the mixing arm is equal to the angular velocity multiplied by the radius. If the speed of the mixing tool is reduced too much, the circulation flow in the center comes to a standstill. Mixing is then no longer possible.

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