Ultra Centrifugal Mill ZM 200
The RETSCH Ultra Centrifugal Mill ZM 200 is used for the rapid fine size reduction of soft to medium-hard and fibrous materials. Because of the efficient size reduction technique and the comprehensive range of accessories the ZM 200 ensures the gentle preparation of analytical samples in a very short time.
Application Examples
bones, chemical products, coal, coke, drugs, electronic scrap, feed pellets, fertilizers, food, leather, paper, pharmaceutical materials, plant materials, plastics, powder coating, refuse derived fuels, resins, rubber, spices, textiles, wood, ...
Product Advantages
- versatile in use due to wide range of accessories
- high final fineness
- wide speed range, adjustable from 6 000 to 18 000 min-1
- considerably increased throughput due to optimally matched frequency converter and 3-phase motor
- gentle and very rapid size reduction by 2-step rotor/screen system
- quiet and reliable, easy to clean
- comfortable parameter setting via display and ergonomic 1-button operation
- comfortable safety housing with automatic cover closure
- motor compartment and electronics protected against dust and material penetration
- 2-year warranty, safe design to CE standard
Features
| Applications | fine grinding |
| Field of application | agriculture, biology, chemistry / plastics, construction materials, engineering / electronics, environment, food, medicine / pharmaceuticals, mineralogy / metallurgy |
| Feed material | soft, medium-hard, brittle, fibrous |
| Size reduction principle | impact, shearing |
| Material feed size* | < 10 mm |
| Final fineness* | < 40 µm |
| Batch size / feed quantity* | 300 ml with standard cassette 20 ml with mini-cassette 1000 ml with paper filter bag 2500 ml with cyclone 4500 ml with cyclone |
| Speed at 50 Hz (60 Hz) | 6000 - 18000 min-1, free selectable |
| Rotor peripheral speed | 31 - 93 m/s |
| Types of rotors | 6-tooth rotor / 12-tooth rotor / 24-tooth rotor / 8-tooth mini-rotor |
| Material of grinding tools | stainless steel, titanium, steel 1.4404, stainless steel with wear-resistant coating |
| Sieve sizes | trapezoid holes 0.08 / 0.12 / 0.20 / 0.25 / 0.50 / 0.75 / 1.00 / 1.50 / 2.00 mm round holes 3.00 / 4.00 / 5.00 / 6.00 / 10.00 mm |
| Collector capacity | 900 ml with standard cassette 50 ml with mini-cassette 3000 ml with paper filter bag 3000 ml with cyclone 5000 ml with cyclone |
| Drive | asynchron motor with frequency converter |
| Protection code | IP 20 |
| Power consumption | 1300 W |
| W x H x D closed | 410 x 515 x 365 mm |
| Net weight | ~ 38 kg |
| Workplace related emission value | LpAeq 77.5 dB(A) |
| *depending on feed material and instrument configuration/settings |
Function Principle
In the Ultra Centrifugal Mill ZM 200 size reduction takes place by impact and shearing effects between the rotor and the fixed ring sieve. The feed material passes through the hopper (with splash-back protection) onto the rotor. Centrifugal acceleration throws it outward with great energy and it is precrushed on impact with the wedge-shaped rotor teeth moving at a high speed. It is then finely ground between the rotor and the ring sieve. This 2-step grinding ensures particularly gentle but fast processing. The feed material only remains in the grinding chamber for a very short time, which means that the characteristic features of the sample to be determined are not altered. The ground sample is collected in the collecting cassette surrounding the grinding chamber or in the downstream cyclone or paper filter bag.
Subject to technical modifications and errors
