Disc Mill DM 200
The RETSCH Disc Mill DM 200 is used for batchwise or continuous preliminary and fine comminution of medium-hard to hard-brittle solids (up to 8 Mohs). Thanks to its robust design, it can be used under rough conditions in laboratories and pilot plants, as well as online for the quality control of raw materials.
Application Examples
bauxite, chalk, chamotte, coal, coke, dental ceramics, drilling cores, glass, gypsum, sewage sludge, sintered ceramics, slag, soils, steatite, ...
Product Advantages
- accurate gap setting for reproducible grinding results
- short grinding times, high final fineness
- observation window for checking the gap width
- good grinding chamber accessibility
- contamination-free grinding with grinding discs made from 4 different materials
- grinding discs with long working life
- simple operation
- dust-free grinding and easy cleaning
- maintenance-free 3-phase geared motor
- approved safety (TÜV, CE)
- 2 year warranty
Features
| Applications | preliminary and fine grinding |
| Field of application | chemistry / plastics, construction materials, engineering / electronics, glass / ceramics, medicine / pharmaceuticals, mineralogy / metallurgy |
| Feed material | medium-hard, hard, brittle |
| Size reduction principle | pressure, friction |
| Material feed size* | < 20 mm |
| Final fineness* | < 100 µm |
| Speed at 50 Hz (60 Hz) | 440 min-1 (528 min-1) |
| Material of grinding tools | zirconium oxide, hardened steel, tungsten carbide, manganese steel |
| Gap width setting | continuous, 0.1 - 5 mm |
| Collector capacity | 2.5 l |
| Drive | 3-phase geared motor |
| Drive power | 1.85 kW |
| Protection code | IP 55 |
| W x H x D closed | 440 x 400 x 870 mm |
| Net weight | ~ 140 kg |
| Workplace related emission value | LpAeq 69.4 dB(A |
| *depending on feed material and instrument configuration/settings |
Function Principle
In the DM 200 the feed material enters the dustproof chamber from the filling hopper and is fed centrally between two vertical grinding discs. A moving grinding disc rotates against a fixed one and draws in the feed material. The necessary comminution effects are generated by pressure and frictional forces. The progressively arranged grinding disc meshing first subjects the sample to preliminary crushing; centrifugal force then moves it to the outer regions of the grinding discs where fine comminution takes place. The processed sample exits through the grinding gap and is collected in a receiver. The gap width between the grinding discs is continuously adjustable and can be adjusted during operation in the range between 0.1 and 5 mm; an additional observation window is provided for checking the gap setting.
In the DM 200 the feed material enters the dustproof chamber from the filling hopper and is fed centrally between two vertical grinding discs. A moving grinding disc rotates against a fixed one and draws in the feed material. The necessary comminution effects are generated by pressure and frictional forces. The progressively arranged grinding disc meshing first subjects the sample to preliminary crushing; centrifugal force then moves it to the outer regions of the grinding discs where fine comminution takes place. The processed sample exits through the grinding gap and is collected in a receiver. The gap width between the grinding discs is continuously adjustable and can be adjusted during operation in the range between 0.1 and 5 mm; an additional observation window is provided for checking the gap setting.Subject to technical modifications and errors
