Hammer mills are used for crushing, pulverizing and deagglomeration of medium-hard, hard, brittle, tough and fibrous samples.
The rugged RETSCH Hammer Mill HM 200 accepts large feed sizes up to 100 mm which can be reduced to less than 0.8 mm, depending on the sample properties.
The mill is ideally suited for processing large volumes batchwise or continuously which ensures high sample throughput. Thanks to features like rugged design, easy handling and quick cleaning, the HM 200 is equally suitable for use in laboratories or pilot plants.
This diagram shows a comparison of the Hammer Mill HM 200 with two rotor mills. The extremely high sample throughput of the HM 200 is clearly visible. The HM 200 shows a good crushing efficiency of 125, which is the value of the maximum feed size divided by the finest achievable grind size. The SR 300 and SK 300 accept a maximum feed size of 25 mm (unlike the HM 200 which accepts sizes up to 100 mm) and crush particles to a size below 0.05 mm or 0.1 mm respectively - resulting in a higher crushing ratio.
| Applications | coarse and pre-crushing, desagglomeration |
| Field of application | agriculture, chemistry / plastics, coal, construction materials, engineering / electronics, environment / recycling, food / feed, geology / metallurgy, glass / ceramics |
| Feed material | medium-hard, hard, brittle, tough, fibrous |
| Size reduction principle | impact, shearing |
| Material feed size* | < 100 mm |
| Final fineness* | < 0.8 mm |
| Batch size / feed quantity* | up to 30 l depending on collecting receptacle |
| Speed at 50 Hz (60 Hz) | 3000 min-1 (3500 min-1) |
| Throughput* | 1500 kg/h |
| Rotor peripheral speed | 31.4 m/s |
| Rotor diameter | 200 mm |
| Types of rotors | 10 swing hammer |
| Dry grinding | yes |
| Wet grinding | no |
| Cryogenic grinding | no |
| Material of grinding tools | hardened steel 1.0503 (hammers); steel 1.0330 (sieves) |
| Sieve sizes | 2 / 3 / 4 / 5 / 6 / 8 / 10 / 15 / 40 mm |
| Dust extraction unit | yes |
| Process line version | yes |
| Collector capacity | 10 l, 30 l, continuous outlet |
| Drive | 3-phase motor |
| Drive power | 1.5 kW |
| Electrical supply data | different voltages |
| Power connection | 3-phase |
| Protection code | IP 54 |
| W x H x D closed | 320 x 960 x 800 mm |
| Net weight | ~ 150 kg |
| Standards | CE |
*depending on feed material and instrument configuration/settings
