Presentation given by Mr. Olaf Nährig, Digital Engineering in Feed Manufacturing debate, co-organized by Perendale

1. Intelligent Solutions in the Feed Processing Chain
Coarse particle structure – grinding by roller mill
and processing with expander
Olaf Naehrig, Senior Area Manager
Amandus Kahl GmbH & Co. KG
Crushing Roller Mill Kahl Expander

2. Intelligent Solutions in the Feed Processing Chain
Effect coarse particles for production costs and animal nutrition and health:
A. Energy consumption: B. Animal nutrition and health:
Hammer mill 7 kWh/t Coarse particles are superior in digestion
Roller mill 2 kWh/t and for animal health
Energy saving, up to 5 kWh/t Key words: proventriculitis, ascites, gizzard
erosion, ulcers, salmonella
too fine suitable particle size

3. Intelligent Solutions in the Feed Processing Chain
Effect of Coarse and Fine Grinding Stage grinding with roller mill + hammer mill
100
90
80
70 hammer mill
Total proportion in %
60
50
40
30
roller mill
20
10
0
0 0,5 1 1,4 2 2,8
Particle size in mm
Wheat roller mill gap 0,5 mm
Corn roller mill gap 0,75 mm
Wheat hammer mill screen 4 mm

4. Intelligent Solutions in the Feed Processing Chain
Maintaining coarse particles in downstream processing
Coarse structure maintained in expander
Pelleting presses grind down coarse particles!!

5. Intelligent Solutions in the Feed Processing Chain
Gap Adjustment Device:
• PLC control
• Gap adjustment by
manual spindle drive
• Continuously adjustable
• Gap size: 0,3 – 13,0 mm
(+/-0,1mm)
Treatment control:
• PLC control
• Annular gap adjustment
by hydraulic cylinder
• cone positioning
• flexible energy inputs
• adapted conditioning

6. Intelligent Solutions in the Feed Processing Chain
Outlook / Trends:
• Online Particle Measurement during grinding process
• Technology already implemented for precision grinding, e.g. in coffee
and pharmaceutical industry
• Phase-Feeding vs. Universal Feeding
• Production of smaller dedicated batches instead of large batches
• Fast and easy change of processing parameters required
• Advantage of Crushing Roller Mill with gap adjustment
• Processing of mono-components
• Production of specialty feeds in small batches
• Efficient utilisation of feed
• Coarse grinding allows more efficient nutrient uptake
• Increased use of expander for better feed conversion rate, lower feed
costs and better animal health

7. Intelligent Solutions in the Feed Processing Chain
www.amandus-kahl-group.de
Thank you for your attention
Please visit us in Hall 104, Booth D 032