Fraunhofer Research Institution for Materials Recycling and Resource Strategies IWKSFor the mechanical comminution and classification of solid materials a number of different machines are available for various purposes. They can be used for fundamental studies or as part of process chains and are also applied for sample preparation prior to material analysis.
Laboratory equipment
Jaw Crusher
PULVERISETTE 1, Fritsch
Areas of application:
Pre-crushing of very hard, hard, medium-hard, brittle materials, and abrasive materials; metal-free grinding is possible
Min. feed quantity: 20 ml
Max. throughput: 140 kg/h
Max. feed size: approx. 60 mm
Final fineness: 1 – 15 mm
Speed Rotor Mill
PULVERISETTE 14, Fritsch
Areas of application:
Fine grinding of soft, medium-hard, brittle, fibrous, and temperature-sensitive materials
Min. feed quantity: 10 ml
Max. throughput: 5 l/h
Max. feed size: approx. 10 mm
Final fineness: 0,08 – 6 mm
Cutting Mill Combination with Cyclone Separator
PULVERISETTE 25/19, Fritsch
Areas of application:
One or two stage cutting of soft, medium-hard, brittle, tough, and fibrous materials
Max. throughput: 60 l/h
Max. feed size: approx. 120 x 85 mm
Final fineness: 0,2 – 10 mm
Planetary Ball Mill
PULVERISETTE 6, Fritsch
Areas of application:
Finest grinding of hard, medium-hard, soft, brittle, tough, and moist materials as well as mechanical alloying, mixing, and homogenisation
Feed quantity: 10 – 225 ml
Max. feed size: approx. 10 mm
Final fineness: < 1 µm (wet grinding)
Mixer Mill
MM 400, Retsch
Areas of application:
Dry, wet or cryogenic milling of hard, medium-hard, soft, brittle, elastic, and fibrous materials as well as mixing and homogenisation
Max. feed quantity: 2 x 20 ml
Max. feed size: approx. 8 mm
Final fineness: approx. 5 µm
Cryogenic Mill
6870D Freezer/Mill®, SPEX® SamplePrep
Areas of application:
Grinding and pulverisation of soft, flexible, tough, elastic, and temperature-sensitive materials
Grinding temperature: -196 °C (liquid nitrogen)
Feed quantity: 0,1 – 200 g
Max. feed size: approx. 25 mm
Final fineness: depending on grinding time and material
Vibratory Sieve Shaker
AS 300 control, Retsch
Areas of application:
Separation, fractioning, and particle size determination of powders, bulk materials, and suspensions
Max. feed quantity: 6 kg
Max. sieve diameter: 315 mm
Max. number of fractions: 9 or 17
Mesh range: 20 µm – 40 mm
Optical Particle Size Analysis
CAMSIZER®, Retsch Technology
Areas of application:
Optical determination of particle size and particle shape distributions of powders, granulates and bulk materials
Feed material: dry and free-flowing
Range of measurement: 30 µm – 30 mm
Rotating Sample Divider
PT 100, Retsch
Areas of application:
Representative sampling and sample reduction of bulk materials
Max. feed quantity: 5000 ml
Max. feed size: 10 mm
Number of partial quantities: 8