The RETSCH 20.824.0002 Ultra Centrifugal Mill ZM 300 is a powerful and efficient rotor mill that is designed for high-speed size reduction of soft to medium-hard materials, including temperature-sensitive or fibrous substances. With a variable speed range of 6,000 to 23,000 rpm, this mill provides maximum grinding performance while also ensuring ease of use.
One of the key features of the Ultra Centrifugal Mill ZM 300 is its integrated temperature monitoring system. This system guarantees reproducibility even during long grinding processes or when pulverizing large sample volumes. By keeping track of the cassette temperature, the mill ensures optimum process control and allows for fine adjustments to be made to improve reproducibility.
The ZM 300 offers a wide selection of rotors, ring sieves, and cassettes, making it highly versatile in terms of sample preparation. Its patented cassette system allows for maximum sample recovery and easy cleaning, while an optional cassette is available for higher sample volumes. With ring sieves that offer aperture sizes ranging from 0.08 to 10 mm, the ZM 300 ensures a defined final fineness for different applications.
The mill also offers various collecting vessels for different sample volumes, ranging from 250 ml to 4.5 l. Additionally, the ZM 300 can be equipped with an automated vibratory feeder and different cyclone systems to further optimize the grinding process.
The integration of an integrated temperature sensor in the mill's display allows users to constantly monitor the temperature during the grinding process. This capability helps optimize the grinding process and improve reproducibility by ensuring the temperature increase is kept at a moderate level, preventing any negative effects on the grinding results.
Compared to classic centrifugal mills, such as the ZM 200, the ZM 300 offers a higher maximum speed of 23,000 rpm. This increased speed results in particles that are 15 to 20% finer, depending on the material being processed. Consequently, the ZM 300 achieves higher final fineness and increased throughput, particularly for cryogenically pulverized polymer samples and fibrous materials like hay.
The RETSCH 20.824.0002 Ultra Centrifugal Mill ZM 300 is an ideal solution for various applications, including grinding plastic materials, crushing chicken feed, and obtaining fine grind sizes. With its advanced features, robust design, and exceptional performance, the ZM 300 sets the standard for food and feed processing.
Rotor mills are used for high-speed size reduction of soft to medium-hard as well as temperature-sensitive or fibrous materials.
The powerful Ultra Centrifugal Mill ZM 300 provides maximum grinding performance combined with ease of use. The variable speed from 6,000 to 23,000 rpm allows for gentle, neutral-to-analysis sample preparation in a very short time.
Thanks to an integrated temperature monitoring system, reproducibility is guaranteed even for long grinding processes or pulverization of large sample volumes.
The wide selection of rotors, ring sieves and cassettes makes the ZM 30
THE STANDARD FOR FOOD & FEED
- Gentle high-speed pulverization due to pre- and fine grinding in one working run
- Optimum process control and reproducibility based on monitoring of the cassette temperature
- Patented cassette system for maximum sample recovery and easy cleaning
- Optional cassette for sample volumes up to 600 ml
- Wide speed range from 6,000 to 23,000 rpm
- Defined final fineness due to ring sieves with aperture sizes from 0.08 – 10 mm
- Collecting vessels for sample volumes from 250 ml to 4.5 l
- Automated vibratory feeder and various cyclone systems available
ULTRA CENTRIFUGAL MILL ZM 300INCREASED REPRODUCIBILITY THROUGH TEMPERATURE MONITORING
The speed range from 6000 to 23000 rpm allows for optimum adaptation of the grinding process to the sample requirements by keeping the grinding time as short as possible and the temperature increase as moderate as possible. Too much heat may have a negative effect on the grinding results, for example, if moisture or volatile components escape.
The ZM 300 is equipped with an integrated temperature sensor which measures the temperature of the cassette lid near the ring sieve. The measured temperature is constantly shown in the mill’s display, allowing the user to optimize the grinding process and improve reproducibility.
ULTRA CENTRIFUGAL MILL ZM 300MAXIMUM SPEED FOR HIGH FINAL FINENESS AND INCREASED THROUGHPUT
The maximum speed of classic centrifugal mills, like the widely used ZM 200, is usually limited to 18,000 rpm (rotor peripheral speed 98 m/s). The ZM 300 achieves a maximum speed of 23,000 rpm (rotor peripheral speed 118 m/s) and produces particles which are 15 to 20 % finer in comparison, depending on the material.
The higher speed has a particularly positive impact on the grind sizes of polymer samples which are pulverized cryogenically, or of fibrous materials like hay. Compared to models with a maximum speed of 18,000 rpm, the throughput may be increased by 10 to 15 %.
APPLICATION EXAMPLES
Grind sizes of plastic materials (POM or PP) after grinding with different sieves and speeds. The speed of 23,000 rpm results in a higher fineness for all sieves compared to grinding at 18,000 rpm. For example, a 19 % reduction in fineness can be achieved when POM is ground with a 0.12 mm distance sieve at 23,000 rpm.
The maximum sample throughput, e.g. when crushing chicken feed with a 0.5 mm ring sieve, could be increased by 16% when crushing at maximum speed of 23,000 min-1 instead of 18,000 min-1.
