Dispersion

In the specialist area of dispersing, the focus is on:

  • Energy-efficient production of dispersions
  • Process optimisation and improvement of dispersion quality

Some selected examples of our activities in the field of dispersion processes are:

  • Selection and testing of suitable processes depending on the product properties
  • Production of suspensions and emulsions
  • Carrying out test days to compare different dispersion processes
  • Accompanying the upscaling from laboratory to industrial scale
Martin Mühlbach
Research Assistant Dispersion Processes
Selb
+49 9287 99880-15
m.muehlbach@skz.de
Marc Weiser
Project Engineer Dispersion Process
Selb
+49 9287 99880-18
m.weiser@skz.de

Technical equipment

Medium pressure homogeniser

Task

  • Dispersion of agglomerated particles 
  • Production of emulsions

Functional principle

  • In the dispersing unit, energy is converted into very high velocities (up to 300 m/s) by pressure differences.
  • Force effect on the product through turbulence, cavitation and specifically applied shear and impact forces

Parameters

  • Working pressure between 10 and 700 bar
  • Delivery rate 18 - 60 l/h
  • Typical batch size 5 - 100 l

Typical applications

  • Paints and coatings
  • Resin systems
  • Food and beverages
High-pressure homogeniser

Task

  • Dispersion of agglomerated particles 
  • Production of emulsions

Conversion

  • In the dispersing unit, energy is converted into very high velocities by pressure differences
  • Force effect on the product due to turbulence, cavitation and specifically applied shear forces

Parameters

  • Maximum working pressure: 2,000 bar

Typical areas of application

  • Coatings and surface systems
  • Resin systems
  • Food and beverages
     
Dissolver

Task

  • Rapid mixing unit for intensive and time-saving mixing and dispersing 

Implementation

  • Mixing tool: various toothed rim discs

Parameters

  • Speed: 500 - 6,000 min-1
  • Typical batch size from 1 - 10 l

Typical applications

  • Paints, lacquers and surface systems
  • Resin systems and adhesives
     
Rotor-stator disperser

Task

  • Multifunctional laboratory machine for mixing, wet grinding, dispersing and adding powders to liquids

Implementation

  • Single-stage dispersing module Ultra-Turrax (rotor-stator)
  • Multi-stage high-performance dispersing machine Dispax-Reactor (rotor-stator for fine particle size reduction with narrow particle size distribution)
  • CMS module for solid-liquid mixing
  • module Colloid Mill for wet or fine grinding of hard and granular raw materials or for the production of very fine emulsions
  • Ultra-Turrax as batch disperser

Parameters

  • Speed: 3,000 and 26,000 min-1 (depending on the module used)
  • Typical batch size from 20 - 2,000 ml
  • Can be used for inline, batch or recirculation operation

Typical applications

  • Resin systems
  • Cosmetics and medicine
  • Paints and pigments
Universal mixer

Task

  • Mixing and kneading of medium to high viscosity material systems
  • Incorporation of high solids content into silicone masses
  • Carrying out various process steps in a mixing unit: wetting, plasticising, homogenising, deagglomerating, heating, cooling, degassing

Conversion

  • Incorporation and mixing with two counter-rotating Sigma blades

Parameters

  • Speed: 10 - 100 min-1
  • Batch size: 1 l
  • with and without vacuum
  • Temperature range: 10 °C - 200 °C

Typical applications

  • Highly filled, pasty masses
  • Incorporation of solids into rubber, plastics, silicone, adhesives 
Agitator ball mill

Task

  • Multifunctional laboratory tube mill for scientific academic research and development tasks
  • Wet grinding of suspensions
  • Scale-up to comparable production machines possible

Implementation

  • Process can be mapped as a batch or in a cycle
  • Agitator shaft in the grinding chamber ensures movement of the grinding media
  • Product stress due to shear, pressure and impact effect of the grinding media

Parameters

  • Speed: 1,000 - 4,500 min-1 (peripheral speeds 3.5 - 18 m/s)
  • Typical batch size from 0.15 - 15 l
  • Shaft and grinding chamber design: Stainless steel, ceramic and PU
  • Grinding chamber volume: 240 - 910 ml
  • Grinding media: 
  • Design: Ceramic, steel and glass
  • Ø 0.1 - 2.4 mm

Typical applications

  • Paints and lacquers
  • Pharmaceuticals and cosmetics 
  • Paper coatings
  • Ceramic suspensions
  • Food
  • Nano suspensions
Tumbling mixer

Task

  • Mixing / homogenising powders, granulates and solid/liquid materials

Implementation

  • Diagonal arrangement of the mixing vessel ensures a tumbling motion and thus a uniform, three-dimensional material rearrangement 
  • Different vessels can be used in the mixing vessel

Parameters

  • Speed: 5 - 40 min-1
  • Batch size: max. 5 kg

Typical areas of application

  • Production of homogeneous powder mixtures
     
Dual asymmetric centrifuge

Task

  • Rapid mixing unit for intensive and time-saving mixing of small quantities
  • mostly for screening recipes

Implementation

  • Combination of centrifugal forces acting in different planes by double rotation of the mixing bowl

Parameters

  • Speed: 300 - 3,500 min-1
  • Typical batch size from 5 - 100 g

Typical applications

  • Paints and lacquers
  • Resin systems and adhesives
  • Recipe development
Three-roll mill

Task

  • Homogenising, deaerating, wetting and fine grinding of suspensions
  • A defined upper particle size limit can be achieved by precisely adjusting the gap distances between the rollers

Implementation

  • Defined constraint system through set gap distance

Parameter

  • Gap widths between 5 - 121 µm
  • Speeds between 30 - 600 min-1

Typical applications

  • Paints and lacquers
  • Resin systems and adhesives
  • Coatings
  • Highly filled ceramic slurries
  • Pigment pastes and masterbatches
Ultrasonic homogeniser

Task

  • Dispersing, deagglomerating, wetting and real comminution of solids in suspensions by means of ultrasound

Conversion

  • Batch process or in circulation by means of water-cooled flow-through cell
  • Stress due to cavitation, impact, turbulence and shear

Parameters

  • max. power input: 1,000 W
  • Process pressure: max. 5 bar 

Typical applications

  • Paints and lacquers
  • Resin systems and adhesives
  • Coatings
Ultra Centrifugal Mill

Task

  • Dry fine comminution of soft to medium-hard and fibrous materials
  • Material-friendly and analysis-oriented sample preparation in the shortest possible time

Implementation

  • Comminution principle: impact, shear

Parameter

  • Feed volume: up to 300 ml
  • Feed size: < 10 mm
  • Final fineness: < 40 µm
  • Speed: 6,000 - 18,000 min-1

Typical applications

  • Sample preparation of dry solids for analyses
  • Size reduction of fibrous solids
  • Dry grinding of minerals and ores
Intensive mixer

Task

  • Mixing, drying, granulating, agglomerating, plasticising, kneading, compounding, degassing, tempering, dispersing, suspending, coating

Conversion

  • Mixer with functional separation of the material movement and the mixing function
  • Rotating mixing vessel ensures circulation of the material to be mixed, intensification possible through inclined position
  • Batch process 

Parameters

  • max. mixing volume: 1 l
  • Vacuum: 50 - 1,100 mbar
  • Speeds:
  • Mixer: 300 - 5,000 min-1
  • Container: 12 - 65 min-1
  • Inclination: 0 - 30°

Typical applications

  • Paints and lacquers
  • Battery suspensions (Li-Ion)
  • Resin systems and adhesives
  • Coatings
  • Granulation and agglomeration of fine powders
  • Production of polymer masterbatches
SKZ Technology Center
SKZ – Technology Center
Friedrich-Bergius-Ring 22
97076 Würzburg

Telefon: +49 931 4104-0
E-Mail: training@skz.de

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SKZ Welder Training Center
SKZ Welder Training Center
Frankfurter Str. 15-17
97082 Würzburg

Telefon: +49 931 4104-123
E-Mail: training@skz.de

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SKZ Training Center
SKZ Training Center
Köthener Straße 33a
06118 Halle (Saale)

Telefon: +49 345 53045-0
E-Mail: halle@skz.de

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SKZ Training Center
SKZ Training Center
Rauher Grund 9
72160 Horb am Neckar

Telefon: +49 7451 62457-0
E-Mail: horb@skz.de

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SKZ Training Center
SKZ Training Center
Woltorfer Straße 77, Halle G
31224 Peine

Telefon: +49 5171 48935
E-Mail: peine@skz.de

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EZD · Location Selb
European Center for Dispersion Technologies (EZD)
c/o SKZ – KFE gGmbH
Weißenbacher Str. 86
95100 Selb

Telefon: +49 9287 99880-0
E-Mail: ezd@skz.de

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Analytik Service Obernburg
Analytik Service Obernburg GmbH
Industrie Center Obernburg
63784 Obernburg

Telefon: +49 6022 81-2668
E-Mail: info@aso-skz.de

Route berechnen
SKZ Standort EZD Selb ,SKZ Weiterbildung
EZD · Location Selb

European Centre for Dispersion Technologies (EZD)
c/o SKZ – KFE gGmbH
Weißenbacher Str. 86
95100 Selb

Phone: +49 9287 99880-0
eMail: ezd@skz.de

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