Alpine AFG

Alpine AFS

Alpine AHM

Alpine AL

Alpine APP

Alpine AS

Alpine Circoplex ZPS

Alpine Contraplex CW

Alpine Multiplex Zig-Zag Classifier

Alpine MZR

Alpine PDD Twin Screw Volumetric

Alpine Rotoplex Granulators

Alpine SO Super Orion

Alpine Stratoplex ASP

Alpine TFG

Alpine Toner TSP High Efficiency Toner Classifier

Alpine Toner TTSP High Efficiency Tandem Toner Classifier

Alpine TTC

Alpine TTG

Alpine Turboplex ATP High Efficiency Classifier

Alpine UPZ

Alpine Ventoplex High Volume Classifier

Carbon Black Processing

Flue Gas Desulfurization

Hosokawa Bepex Pharmapaktor

Hosokawa Peneto Analyzer PNT-N

Hosokawa Powder Characteristics Tester PT-X

Majac Acucut High Energy Air Classifier

Micron Agglomaster AGM

Micron Air Jet Sieve

Micron Denspack

Micron Drymeister

Micron Faculty

Micron Finetron Feeder

Micron Mechanofusion

Micron Nobilta

Micron Penetration Analyzer

Micron Pulvis

Micron Separator

Micron Victory Mill

Mikro ACM Air Classifying Mill

Mikro Bantam Hammer & Screen Mill

Mikro Classifier CC

Mikro High Efficiency Cyclone

Mikro LPM

Mikro Pneumatic Vibratory Feeder PF

Mikro-Atomizer

Mikro-Crusher

Mikro-LGM

Mikro-Pulverizer

Stott Hygienic Bulk Packaging Systems

Stott Laminar Flow Booth

Universal Mikro Pulverizer

Vitalair Downflow Booths

Vrieco-Nauta Active Freeze Dryer

Vrieco-Nauta Centro Screw Mixer (CM-Series)

Vrieco-Nauta Conical Screw Mixers

Vrieco-Nauta Cyclomix

Vrieco-Nauta Horizontal Ribbon Mixer

Vrieco-Nauta Isem Ball Segment Valves

Vrieco-Nauta Mixing Sensors

Vrieco-Nauta Silo Mixer

Vrieco-Nauta Vacuum Dryers

Vrieco-Nauta Vitomix

Vrieco-Nauta Conical Screw Mixers

The basic design consists of a cylindrical screw located at the vessel wall that conveys product from the bottom of the conical vessel to the product surface. The screw is attached to an arm which rotates around the perimeter of the vessel causing convective mixing and shear. The particles at the surface opposite the screw accelerate downward in a mass flow by gravity as the diameter of the vessel decreases. The three actions result in a unique three dimensional mixing action.

These versatile batch mixers are unique in many ways. Their design provides for a very gentle mixing action with low horsepower consumption. The special mixing action ensures a very homogenous mixture and short mixing times. The conical vessel design allows a wide range of filling capacities and the mass flow characteristic design minimizes segregation upon discharge. Because there are no horizontal internal surfaces, products are completely discharged, minimizing product loss and providing for easy cleaning.

Vessels can be designed for overpressure and under pressure operating conditions and units can be supplied with a variety of accessories including liquid injection, product samplers, high intensity lump breakers, level and temperature probes, load cells for batch weighing and jackets for heating and cooling are some examples.

Size Range/ Capacity: 5 liters to 60,000 liters
Materials of Construction: Steel, Stainless Steel, Hastelloy and other alloys
Available designs:

  • Cantilevered Screw design (no bottom support)
  • Radial Locator Screw design ( guide ring for very large units)
  • Single bottom discharge or Multiple side discharges
  • Gear drive systems as standard – oil and grease lubrication available
  • Belt drive systems available for sanitary applications – no lubrication inside the vessel
  • Clean in place designs

Applications:

  • Mixing and homogenization of powders, pastes and slurries
  • Granulation or agglomeration of powders
  • Addition or injection of liquids into dry powders
  • Reaction under vacuum or pressure conditions
  • Processing of powders under inert conditions
  • Heating and cooling of powders
  • Storage of non free flowing powders
  • De aeration or densification of powders
  • Homogenization of particle size and color

Vrieco-Nauta conical screw mixers were first developed and manufactured by the J.E Nauta Company after the Second World War. The company resided in Haarlem, the Netherlands and started by manufacturing these mixers for the cattle feed industry. The unique design and features of new design allowed Nauta to quickly expand into other markets and soon they licensed the technology to other companies around the world. Hosokawa Micron acquired Nauta and then Vrieco in the early 1980’s.