Cutting mills are suitable for the grinding of soft, medium-hard, tough, elastic, fibrous, and heterogeneous mixes of products. Thanks to the powerful 3 kW drive with high torque and RES technology, the Cutting Mill SM 300 excels especially in the tough jobs where other cutting mills fail. This mill allows for perfect adaptation to application requirements by variable speed from 100 to 3,000 min^-1_. A range of bottom sieves with aperture sizes from 0.25 – 20 mm is available, ensuring a defined final fineness.

SUPERIORITY IN DETAIL

Ideal for light & heat-sensitive materials

Instead of the gravity outlet, an optionally available cyclone separator can be connected to the SM 300. The use of the cyclone is advantageous, for example, for light and heat-sensitive samples.

• Increased throughput
• Improved sample discharge from the grinding chamber
• Efficient cooling of sample and cutting tools
• Collecting vessels with 0.25 – 0.5 – 1 – 2 – 5 and 30 liters are available for the cyclone unit

The SM 300 is equipped with double acting cutting bars which substantially increase the number and effectiveness of the cutting events. The parallel section rotor, for example, generates 18 cutting events per rotation.

EASY OPERATION & CLEANING

CONVENIENT OPERATION

Operation of the SM 300 is exceptionally simple and safe. The push-fit rotor and bottom sieves can be easily removed without tools. A safety switch prevents the mill from being started with the door open. An electronic safety check ensures that the door cannot be opened when the motor is running.

QUICK AND EASY CLEANING

The hopper can be folded back to get full access to the grinding chamber which, in combination with the smooth surfaces, greatly facilitates cleaning the mill. So does the design of the bottom sieves which reduces trapping of sample pieces to a minimum.

SPEED REDUCTION – LESS FINES, LESS TEMPERATURE RISE

Reduction of the speed leads to a decreased fine fraction of the sample and to more particles within the desired size range. Especially for this type of application, the lowest speed of the SM 300 was reduced to 100 min^-1. This is also beneficial for grinding heat-sensitive materials: reduced speed results in less energy input, preventing the sample from getting too warm during the process.

316L STAINLESS STEEL VERSION FOODGRADE

For applications like small scale production of food or cosmetics, the SM 300 is available in a stainless steel 316L foodGrade version which meets the guidelines of the food and pharma industry. It is equipped with a long-stock hopper for easy feeding of materials like cannabis plant parts. All parts in contact with the sample are made of 316L in this configuration. Optionally, the rotor blades and the cutting bars are made of a FDA-certified stainless steel which is less prone to wear under constant stress than 316L.

The unit can be equipped with an optional cyclone and a large 30 l receptacle (both stainless steel 316L) for collecting large sample amounts. Smooth surfaces lead to almost 100% sample recovery and easy cleaning.

ACCESSORIES FOR SAFE AND EFFECTIVE GRINDING PROCESSES

ROTOR TYPES
A parallel section rotor, a 6-disc rotor and a V-rotor are available in stainless or heavy-metal-free steel for optimum adaptation to sample properties.

HOPPER TYPES
The SM 300 can be equipped either with the universal hopper, which is suitable for most samples, or the long-stock hopper which is specially designed for long samples.

BOTTOM SIEVES
The bottom sieves with trapezoid or square holes are made of stainless steel or heavy-metal-free steel.

TYPICAL SAMPLE MATERIALS

RETSCH cutting mills are suitable for a vast range of applications. Typical materials include PET preforms, aluminium slag, animal feed, bones, cables, cardboard, electronic components, feed pellets, foils, food, leather, lignite, material mixtures, non-ferrous metals, paper, pharmaceutical products, plant materials, plastic toys, plastics, polymers, refuse derived fuels, resins, rubber, spices, straw, textiles, waste, wood, etc.

TORREFACTION & BIO-COAL

Torrefaction is a thermochemical process carried out in the absence of oxygen to cause the partial decomposition of biomass. Water and volatiles are released from the biomass to leave a solid, dry material known as bio-coal. For some applications, bio coal can be used to replace traditional fossil fuels, thus helping to reduce CO2 emissions.

In this video, both RETSCH cutting mill SM 300 and the CARBOLITE GERO rotating tube furnace TSR have been used as a part of a torrefaction process to create bio-coal fuel.

The Verder Scientific companies provide solutions to support your process every step of the way, from sample preparation and analysis, to heat treatment, and more.

TECHNICAL DATA

*depending on feed material and instrument configuration/settings