Strižný mlýn SM 300

Technické správy (8)

Secondary fuels – Energy for the cement industry
Due to decreasing resources and increasing market prices for primary fuels like oil, gas or coal, it is paramount for the cement industry to search for alternative energy sources. With regard to the CO2 emissions trading, a switch to energy sources which have a neutral CO2 balance can be rather profitable. Usually, these are non-fossil fuels. Industries with high energy consumption have made increasing use of alternative fuels during the last years. Accordingly, the use of so called secondary fuels (also waste derived fuels/wdf or refuse derived fuels/rdf) has gained importance. These are mostly combustible fractions of domestic or industrial waste which cannot be recycled.

Powerful Cutting Mill
The SM 300 excels especially in the tough jobs where other cutting mills fail. It has a freely selectable speed range from 700 to 3,000 rpm with high torque. The mill is convenient to operate and easy to clean. Reliable and extremely efficient sample preparation in the laboratory is now guaranteed with the SM 300.

Renewable energy
Wood residues from forestry work and wood processing are usually processed to wood chips. These can be used in different ways, depending on the type of wood, bark and residual moisture, for example as raw material for chipboards or as substrate for the cultivation of mushrooms. The major part, however, is used for energy generation. The quality of the wood chips can vary significantly, depending on their origin and condition. Trade and industry are interested in the percentage of dry matter and in the calorific value of the chips as the price calculation depends on the water contents of the product. With the analysis result representing an important economic factor, the representative and reproducible sample preparation gains importance, too.

Detection of Mycotoxins in Nuts
Preliminary and fine size reduction

Size reduction of elastic plastics with volatile components
Neutral-to-analysis sample preparation for the detection of PAH and phthalates

Cutting Mill SM 300 - Refinement of a well-proven grinding principle
Cutting mills are used in many different areas of sample preparation for subsequent analyses. Typical applications include the size reduction of secondary fuels, the processing of biomass for renewable energy research, the control of products in the context of RoHS and WEEE regulations or the recovery of precious metals – the variety of sample materials is huge.

Aufbereitung von PET Preforms zur nachfolgenden Analytik
In der Getränkeindustrie werden die Kunststoffflaschen auf das potentiell krebserregende Acetaldehyd geprüft. Dies erfolgt meist in den Vorstufen der Getränkeflaschen, den so genannten Preforms. Bevor der Nachweis erfolgen kann, muss das Acetaldehyd erst aus der Probe extrahiert werden. Um dies reproduzierbar zu ermöglichen, ist es notwendig, die Probe zunächst zu zerkleinern. Dabei ist zu beachten, dass Acetaldehyd eine sehr leicht flüchtige Substanz ist. Der während der Vermahlung notwendige mechanische Energieeintrag kann zur Erwärmung und damit zur Verdunstung des Acetaldehyds führen. Um diesen Effekt zu verhindern, ist die Kryogenvermahlung die ideale Methode.

Energie aus Biomasse
Erneuerbare Energien werden in Zukunft noch mehr an Bedeutung gewinnen und sind schon jetzt ein wichtiger Wirtschaftsfaktor und Standortvorteil. Damit einher geht die Erforschung und Untersuchung von Rohstoffen, bei der der Einsatz von Retsch Mühlen eine reproduzierbare und analysenneutrale Probenvorbereitung gewährleistet, die zuverlässige Analysenergebnisse ermöglicht.