Retsch Vibrating Mill MM 500 control Sets for temperature monitoring and control.
The MM 500 control is a vibrating mill for dry, wet and cryogenic grinding with a maximum frequency of 30 Hz.
It is the first vibrating mill on the market that allows the temperature to be monitored and regulated during the grinding process.
The achievable temperature range extends from -100 to 100 °C, with various options available for cooling and heating: The mill can be operated with various temperature control liquids, which allows the use of different temperature control units.
If liquid nitrogen is used for cooling, the vibrating mill can be easily expanded with the CryoPad.
The CryoPad functions like a docking station. It is positioned under the vibrating mill and connected.
The innovative CryoPad technology allows the selection and maintenance of a specific cooling temperature in the range of -100 to 0 °C during grinding.
Advantages of the sophisticated design
- Dry, wet and cryogenic grinding at up to 30 Hz for powerful comminution with high energy input
- fast and convenient sample preparation in two Screw-Lock grinding bowls up to 125 ml
- patented, hermetically sealed cooling pipe system for safe handling of tempering liquids
- wide range of accessories, such as venting lids and heavy metal-free grinding bowls (also suitable for low temperatures)
- Ergonomic clamping of the grinding bowls, low noise level, user-friendly setting of process parameters via touch display
Temperature monitoring and regulation
- Continuous temperature monitoring during sample preparation
- Cooling and heating in the range from - 100 to 100 °C
- Operation with liquid nitrogen or other temperature control fluids
- Great flexibility in the choice of temperature control unit (e.g. cryostat, chiller, LN2 tank ...)
- Cryogenic grinding also possible without LN2
CryoPad
- optional unit extension, necessary for operation with liquid nitrogen
- Regulation of the nitrogen flow through cooling plates
- When using liquid nitrogen, a specific cooling temperature in the range of -100 to 0 °C can be selected and maintained
Cooling plates for temperature control
Cooling or heating of the sample is realised by a patented indirect cooling concept. This circumvents the handling of open LN2 baths or dry ice.
To cool or heat the grinding bowls, they are placed on the cooling plates and fixed in place. Contact with the cold cooling plates results in heat being effectively dissipated from the grinding bowls.
The patented, hermetically sealed design of the internal cooling line system allows safe and flexible handling of tempering liquids and promises minimal effort for the user.
Depending on the operating setting, the temperature of the cooling plates can assume a value in the range of - 100 to 100 °C.
Application examples
The temperature control of the MM 500 control is specially designed for processing temperature-sensitive sample material. Cooling or heating can have different objectives.
Cooling the sample material, for example, results in
- the preservation of temperature-sensitive analytes (e.g. volatile substances or pharmaceutical or food ingredients)
- embrittlement
- wet grinding below room temperature
- the control of reactions in the context of mechanochemistry.
Some applications are also improved if the sample material is heated during the process.
Examples of this are:
- paste production (e.g. in the food industry)
- Initiation and intensification of mechanochemical reactions
The required temperatures and the recommended configuration of the vibrating mill depend on the specific application.
Typical sample materials
The MM 500 control offers a wide range of possible applications.
For example, it can be used for sample preparation of secondary fuels, soil, chemical products, medicines, ores, grain, tissue, glass, hair, ceramics, bones, plastics, minerals, oil seeds, plants, sewage sludge, tablets, textiles, wool, etc.
Functional principle
The grinding bowls of the vibrating mill MM 500 control perform circular arc-shaped vibrations in a horizontal position.
Due to the inertia of the balls, they strike the sample material located on the rounded end faces with high energy, causing it to be comminuted.
Due to the cup movement and the motion sequence of the grinding balls, intensive mixing takes place at the same time.
The degree of mixing can be increased by using several small grinding balls.
For the contents of the available sets, please see the tab ''Note''!
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Areas of application:
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AgricultureBuilding materialsBiologyChemistry/PlasticsGeology/MetallurgyGlass/CeramicHomogeniseKyrogen grindingFoodMechanical/Electrical Engineeringmechanical alloyingMechanochemistryMedicine/PharmaceuticsShuffleEnvironment/RecyclingShredding
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Mills Appliance type:
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ball millVibrating Mill
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Protection class (mills):
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IP 30
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Standards:
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CE
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Comminution principle:
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PlumpFriction
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| Retsch Vibrating Mill |
MM 500 control |
| Fields of application |
Homogenising, cryogenic grinding, mechanical alloying,
mechanochemistry, mixing, comminution |
| Range of application |
Agricultural sciences, building materials, biology, chemistry / plastics,
geology / metallurgy, glass / ceramics, foodstuffs,
mechanical / electrical engineering, medicine / pharmaceuticals, environment / recycling |
| Feed material |
hard, medium-hard, soft, brittle, elastic, fibrous |
| Size reduction principle |
Impact, friction |
| Feed particle size* |
<= 10 mm |
| Final fineness* |
~ 0.1 µm |
| Batch/feed quantity* |
maximum 2 x 45 ml |
| Grinding chamber volume |
maximum 2 x 125 ml |
| Number of grinding positions |
2 |
| Vibration frequency setting |
digital, 3 - 30 Hz (180 -1800 min-1) |
| Setting of set temperature |
digital, 0 to -100 °C (only with cryoPad) |
| Setting of the cooling time |
digital, 0 to 60 min (only with cryoPad) |
| Setting of grinding time |
digital, 10 s - 8 h |
| Maximum grinding time |
99 h |
| Storable SOPs (Standard Operating Procedures) |
12 |
| Storable cycle programmes |
4 (with up to 99 repetitions) |
| Typical grinding time |
30 s - 2 min |
| Dry grinding |
yes |
| Wet grinding |
yes |
| Cryogenic grinding |
yes |
| Grinding bowl type |
Screw-Lock grinding bowl with safety locking device |
| Material of grinding tools |
hardened steel, stainless steel, tungsten carbide, zirconium oxide |
| Grinding bowl sizes |
50 ml / 80 ml / 125 ml |
| Electrical connection values |
100-120V, 50/60 Hz; 200-230V, 50/60Hz |
| Mains connection |
1-phase |
| Protection class |
IP 30 |
| Power consumption |
750 W |
| W x H x D closed |
690 x 375 x 585 mm |
| W x H x D closed with cryoPad |
690 x 485 x 585 mm |
| Weight, net |
~ 63 kg |
| Norms / Standards |
CE |
| G 1/4'' (internal thread) |
G 1/4'' (internal thread) |
| G 3/8'' (external thread) |
G 3/8'' (external thread) |
| Permissible operating pressure for temperature control liquids |
0 to 5 bar |
| Typical operating pressure of external temperature control systems, e.g. cryostat |
1 to 2 bar |
| Permissible pressure range for LN2 supply |
1.2 to 1.4 bar |
| Permissible tempering fluids |
Water, water-glycol mixtures, thermofluids, liquid nitrogen |
| Aim of the temperature control |
Cooling, heating, embrittlement |
| Temperature of the temperature control fluid (LN2) |
+100 °C to -196 °C |
| Permissible temperature range of the cooling plates |
+100 °C to -100 °C |
* depending on sample material and instrument configuration/settings
| Retsch cyroPad |
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| Application areas |
Cryogenic grinding with liquid nitrogen |
| Interfaces |
RS-232 (MM 500 control) |
| Communication with MM 500 control |
Connection cable (supplied) |
| Power supply |
own power supply |
| Electrical connection values |
100-230V, 50/60 Hz |
| External power supply classification |
Medical grade isolation level |
| Power supply (cryoPad input) |
24 V, 1 A |
| Optional accessories |
LN2 Autofill 150L, LN2 Autofill 50L |
| LED status display |
yes |
| W x H x D |
670 x 110 x 590 mm |
| Weight, net |
~ 26 kg |
| Norms / Standards |
CE |
| Connection thread unit inlet |
G 1/4'' (internal thread) |
| Connection thread hose set |
UNF 3/4'' |
| Permissible pressure range of LN2 supply |
1.2 to 1.4 bar |
| Permissible tempering liquids |
Liquid nitrogen |
| Emissions |
Nitrogen vapour, condensation water |
| Connection |
via hose set (supplied) |
| Exhaust nitrogen |
via exhaust adapter and corrugated aluminium pipe |
| Temperature of the tempering liquid (LN2) |
-196 °C |
| Temperature control |
PID controller to control the nitrogen flow |
| Adjustment of the set temperature |
digital, 0 to -100 °C |
| Setting of the cooling time |
digital, 0 to 60 min |
Vibrating Mill MM 500 Sets for Temperature Monitoring and Control
Set ''LN2 comfort
(Please order grinding bowls and grinding balls separately)
Version 1: MM 500 control 200-230 V, 50/60 Hz (including cryoPad 100-230 V, 50/60 Hz, Autofill 150 l, connection hose, safety valve)
Variant 2: MM 500 control 100-120 V, 50/60 Hz (including cryoPad 100-230 V, 50/60 Hz, Autofill 150 l, connection hose, safety valve)
Set ''LN2 economy
(Please order grinding bowls and grinding balls separately)
Variant 1: MM 500 control 200-230 V, 50/60 Hz (including cryoPad 100-230 V, 50/60 Hz, Autofill 50 l, connection hose, safety valve)
Variant 2: MM 500 control 100-120 V, 50/60 Hz (including cryoPad 100-230 V, 50/60 Hz, Autofill 50 l, connection hose, safety valve)
Set ''liquid thermal fluid
(for use with e.g. chiller, cryostat, water tap; provided by the customer)
(Please order grinding bowls and grinding balls separately)
Variant 1: MM 500 control 200-230 V, 50/60 Hz (including hose set for tempering liquids)
Version 2: MM 500 control 100-120 V, 50/60 Hz (including hose set for tempering liquids)
