Conical Mixer

a photo of a conical mixer

Product Description

The iconic Hosokawa Vrieco-Nauta® conical screw mixer is a batch mixer specially designed for segregative, free-flowing powders and pastes. It is famous for its low-intensity mixing and is a pioneer in mixing technology. It is especially suited to delicate products and processes where very accurate results are required and is synonymous with gentle mixing of large volumes of up to 100,000 litres, delivering:

  • Low power consumption
  • Fast mixing times
  • Minimum heat generation

The Vrieco-Nauta® conical mixer is a convective mixer and the rotating cantilevered (free hanging) mixing screw conveys the product from bottom of the vessel to the product surface and is suspended from an orbital arm, which rotates the mixing screw along the conical inner vessel wall causing convective mixing of particles and shear. Fast and full discharge through the bottom discharge valve is standard.

The mixers are suitable for a wide range of processing activities in the pharmaceuticals, food, plastics, metals & minerals, nuclear, chemical, pigments and coatings industries. These include:

  • Gentle mixing of free-flowing and segregative powders, pastes, slurries and liquids
  • Moistening of powders
  • Coating
  • Granulation
  • Drying by means of heat input at atmospheric conditions or in combination with vacuum and possible liquid recovery
  • Coating of solids with liquids (with intensifier)

Sizes from laboratory up to 100,000 litres and available in various finishes including highly polished stainless steel. Jacketed designs are frequently used for heating and cooling.


  • Intensifier – a high speed rotor for liquid addition or de-lumping products
  • Side, slide gate bottom and ball segment outlet valve options
  • Sampler to take samples without disturbing the mixing process
  • Dust and watertight closure on access door using FDA approved seals
  • Lump breaker
  • Dump hopper