Retsch ZM 200 - Manual (Page 20)

08.02.2012 Retsch GmbH
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Suitable comminution material
The listing below shows which grinding tool you should
deploy for which comminution material in order to
achieve an optimum result.
Comminution materials Grinding tools
Fodder pellets
Drugs
Straw
Dog cake
Spices
Grasses
Paper cellulose
6-tooth rotor
Adapt the ring sieve to the desired end fineness
For preparation of bulky, fibrous comminution material
Cereals
Maize
Tablets
Fibrous foodstuffs
Dragees
Confectionery
12-tooth rotor
Adapt the ring sieve to the desired end fineness
For preparation of fibrous, brittle comminution material
Dolomite
Talcum
Gypsum
Activated carbon
Wood/brown coal
Dry, non-hygroscopic chemicals
Ion exchanger
Sugar beet/cane
24-tooth rotor
Adapt the ring sieve to the desired end fineness
For preparation of medium-hard, brittle comminution material
Minerals with a Mohs' hardness to 4
Ductile metal powder
Compost
Garbage mixtures
Fluorspar/feldspar
Wear-proof coated rotors
Adapt the ring sieve to the desired end fineness
They can be deployed if it is possible that wear on the standard rotor
could have a disturbing influence on the subsequent analysis.
Biological products
Pharmaceuticals
Foodstuffs of all types
Biological research
Titanium rotors (free of heavy metals)
Adapt the titanium ring sieves to the desired end hardness.
They can be deployed whenever heavy metal contamination is
inadmissible. Titanium rotors and ring sieves should not be used for
hard, abrasive mixtures, but only for soft to medium-hard products.
Comminution methods
Ultra-fine grinding with Conidur ring sieves
This process is deployed to exploit the high shearing
power of Retsch-Conidur sieves.
Select the perforation width of the ring sieves in
dependence on the desired end fineness and on the feed
material. For the majority of materials, the fineness
achieved is around 80% smaller than half the perforation
size of the sieves deployed.
Pre-comminution with round hole ring sieves
This process is deployed to pre-grind material such as
fodder pellets, tablets etc..
Never pre-grind without a ring sieve.
The collecting base can suffer serious damage.
The rotor can damage the cassette cover.