Milling

Mixer Mills grind and homogenize small sample volumes quickly and efficiently by impact and friction. They are suitable for dry, wet and cryogenic grinding as well as for cell disruption for DNA/RNA recovery.

RETSCH’s innovative Planetary Ball Mills meet and exceed all requirements for fast and reproducible grinding down to the nano range. They are used for the most demanding tasks, from routine sample processing to colloidal grinding and advanced materials development.

The High Energy Ball Mill Emax is an entirely new type of mill for high energy input. The unique combination of high friction and impact results in extremely fine particles within the shortest amount of time.

Ball Mills

For powerful size reduction and homogenization.

• Feed material: hard, medium-hard, soft, brittle, elastic, fibrous

• Material feed size: ≤ 8 mm

• Final fineness: 5 µm

• Setting of vibrational frequency: digital, 5 – 30 Hz (300 – 1800 min-1)

• Feed material: soft, hard, brittle, fibrous – dry or wet

• Material feed size: < 20 mm

• Final fineness: < 20 µm

• Feed material: hard, medium-hard, soft, brittle, elastic, fibrous

• Material feed size: ≤ 8 mm

• Final fineness: 5 µm

• Setting of vibrational frequency: digital, 3 – 30 Hz (180 – 1800 min-1)

• Feed material: soft, hard, brittle, fibrous – dry or wet

• Material feed size: < 10 mm

• Final fineness: < 1 µm, for colloidal grinding < 0.1 µm

• No. of grinding stations: 1

• Speed ratio: 1 : -2

Rotor Mills

The rotor mill series includes Ultra Centrifugal Mills, Rotor Beater Mills and Cross Beater Mills. Depending on the particular instrument they are suitable for the preliminary and fine size reduction of soft, fibrous and also hard materials.

• Feed material: soft, medium-hard, brittle, fibrous

• Material feed size: < 10 mm

• Final fineness: < 40 µm

Knife Mills/Blenders

RETSCH knife mills provide completely homogeneous and reproducible size reduction results in seconds so that representative samples can be taken from any location in the grinding container.

• Feed material: soft, medium-hard, elastic, containing water / fat / oil, dry, fibrous

• Material feed size: ~ 130 mm

• Final fineness: < 300 µm

Sieving & Fractioning

Particle size distribution influences the physical and chemical properties of solids. Therefore this criterion is of highest importance in the context of science and quality control. Only if the size distribution remains constant, a steady product quality can be guaranteed, as the following examples show:

– the strength of concrete depends on the particle size of the cement

– the taste of chocolate is influenced by the fineness of the cocoa

– the flow characteristics and solubility of washing powders depend on the fineness and particle shape of the basic materials

RETSCH sieve shakers, test sieves and evaluation software provide the key to easy, rapid, reproducible and, above all, accurate analyses.

Sieve Shakers: sieve shakers for perfect quality control. RETSCH’s line of sieve shakers and sieving machines not only covers a wide measuring range. Thanks to various sieving motions and sieve sizes it is possible to select the ideal instrument for practically any bulk material. Our sieve shakers and sieving machines produce exact and reproducible results and comply with the requirements for the test materials monitoring according to DIN EN ISO 9000 ff.

• Measuring range: 10 µm – ~ 4 mm

• Sieving motion: dispersion by air jet

• Speed: digital, 5 – 55 min-1 (nozzle)

• Measuring range: 20 µm – 25 mm

• Sieving motion: throwing motion with angular momentum

• Amplitude: digital, 1 – 100% (0 – 3 mm)

• Time display: digital, 1 – 99 min

• Suitable sieve diameters: 100 mm / 150 mm / 200 mm / 203 mm (8”)

• Solid stainless steel sieve frame of high stability for reliable sieving results

• Easily combined with all other sieve brands

• Available in many sizes and varieties

Assisting: Sample Preparation

RETSCH instruments from the “Assisting” group optimize and support sample preparation with our mills, jaw crushersand sieve shakers. They provide reproducible processes with greater efficiency and are characterized by their ease of handling.

Our sample dividers prepresentative part-samples of powders, granules and many other bulk goods.

Pellet presses provide high-quality tablets for spectral analyses.

Testing equipment for the determination of the Bond Index: Bond Index Tester BT 100 with the modules „Ball Mill“ or „Rod Mill“, Bond Impact Tester, Abrasion Tester as well as the Flotation Tester FT 100 XL.

Our fluid bed dryer allows laboratory samples to be dried rapidly and gently.

Feeding and cleaning instruments from RETSCH are suitable for universal use and, due to their functionality and high quality, they make routine daily lab tasks much easier.

• Feed material: bulk materials

• Material feed size: ≤ 10 mm

• Number of divisions: 6 / 8 / 10