Milling and homogenization

This field covers the nearly contamination-free processing (dry, wet) of nano-disperse and colloid-disperse raw materials in aqueous or organic solvents with adjusting tailored particle and suspension properties under inert (nitrogen) or explosion-proof conditions.

Products and services offered

 

• Analysis of the milling behavior of nano-disperse and colloid-disperse solid mixtures by nearly contamination-free wet and dry milling
  
• Dry milling and classification in countercurrent mill (nitrogen)
  
• Dispersant screening for the optimization of suspensions in cooperation with the working group Powder and Suspension Characterization (solids content, surface charge, pH value, viscosity)
  
• Analysis of polymer effects (dispersant, binder, lubricant) under the conditions of high shear stress (milling)
  
• Wet milling in laboratory and pilot scale (grinding range 0.5–20 l) by selecting adequate operating parameters for the required particle size distribution
  
• Use of process-implemented measurement equipment for suspension characterization (particle size distribution, pH value, viscosity, surface charge of particles)
  
• Definition of parameters for up-scaling
  
• Characterization of abrasion properties of grinding balls in various attritor mills under standardized conditions

 

Technical equipment

 

• Horizontal agitated ball mills with ceramic or polyurethane lining (volume of grinding chamber: 0.2 l; 1 l; 4 l [explosion-proof] and 20 l), Netzsch FMT
  
• Fluidized bed opposed jet mill (nitrogen, vulkollan lining), Hosokawa Alpine AG
  
• Annular gap-type mill MS 18 with different linings, Fryma-Koruma GmbH
  
• Disc mill, Fritzsch
  
• Attrition mills (volume of grinding chamber: 0.75 l; 25 l; explosion-proof), Fritzsch, Tisoma
  
• Drum mill (100 l), Gerhards GmbH
  
• Cutting mill, Fritzsch
  
• Jaw breaker, Fritzsch
  
• Grinding balls for different ceramic or metallic material systems

 

Examples and references

 

• Wet and dry milling of disperse raw materials and mixtures (ceramic, metal, composites
  
• Milling of natural minerals (lime stone, talc, carbon)
  
• Conditioning of sintered intermediates
  
• Deagglomeration and real comminution in the nano-disperse range (project NanOnLine)