RETSCH PLANETARY BALL MILL PM 200

RETSCH PLANETARY BALL MILL PM 200
Saringan Mesh

Deskripsi produk
The Planetary Ball Mill PM 200 is a powerful benchtop model with 2 grinding stations for grinding jars with a nominal volume of 12 ml to 125 ml.

The extremely high centrifugal forces of Planetary Ball Mills result in very high pulverization energy and therefore short grinding times.

The PM 200 can be found in virtually all industries where the quality control process places the highest demands on purity, speed, fineness and reproducibility.

The mill is ideally suited for tasks in research like mechanochemistry (mechano-synthesis, mechanical alloying and mechanocatalysis), or ultrafine colloidal grinding on a nanometer scale, as well as for routine tasks such as mixing and homogenizing soft, hard, brittle or fibrous materials.
TWO GRINDING STATIONS FOR STANDARD APPLICATIONS
Max. speed 650 rpm
Up to 10 mm feed size and 0.1 µm final fineness
2 grinding stations for jars from 12 ml up to 125 ml, jars of 12 and 25 ml can be stacked (two jars each)
GrindControl to measure temperature and pressure inside the jar.
Aeriation lids to control the atmosphere inside the jar
Storable SOPs and cycle programs, 5 different jar materials for dry and wet grinding


FAST & POWERFUL
Loss-free size reduction down to the submicron range
Wet grinding yields particle sizes in the nanometer range (<100 nm)
Variable speed from 100 to 650 rpm,
speed ratio 1:-2
Grinding with up to 33.3 x acceleration of gravity
Batch-wise processing with max. 2 x 50 ml sample
Wide range of materials for contamination free grinding

PLANETARY BALL MILL PM 200REPRODUCIBILITY, SAFETY AND EASY HANDLING
Reproducible results due to speed control
Easy and safe clamping of grinding jars
The Safety Slider prevents starting the machine without securely clamped jars
Perfect stability on the lab bench thanks to FFCS technology
Innovative counterweight and imbalance sensor for unsupervised operation
Comfortable parameter setting via display and ergonomic 1-button operation
Automatic grinding chamber ventilation
10 SOPs can be stored, programmable starting time
Power failure backup ensures storage of remaining processing time

SETTINGS & OPTIONS
Dry and wet grinding possible
Suitable for long-term trials, 99 h max.
Interval operation allows for cooling breaks
Direction reversal helps to minimize caking effects
THE BEST ALTERNATIVE TO A RETSCH PLANETARY BALL MILL? A RETSCH MIXER MILL.
Benefit from particularly ergonomic handling while achieving the same finenesses down to the nanometer range.

PLANETARY BALL MILL PM 200SAFETY FIRST: JAR CLAMPING

Operation of the RETSCH planetary ball mills is particularly safe. They feature a robust Safety Slider which ensures that the mill can only be started after the grinding jar has been securely fixed with a clamping device. The self-acting lock ensures that the jar is seated correctly and securely. This proven solid mechanical system is less failure-prone than electronic solutions - the user has full access to the sample at any time. When the electronic system fails, it is not possible to unlock the jars, for example.


PLANETARY BALL MILL PM 200WET AND NANO-SCALE GRINDING WITH THE PM 200

Wet grinding is used to obtain particle sizes below 5 µm, as small particles tend to get charged on their surfaces and agglomerate, which makes further grinding in dry mode difficult. By adding a liquid or dispersant the particles can be kept separated.

To produce very fine particles of 100 nm or less (nano-scale grinding) by wet grinding, friction rather than impact is required. This is achieved by using a large number of small grinding balls which have a large surface and many friction points. The ideal filling level of the jar should consist of 60 % small grinding balls.

For more details on jar filling, wet grinding and sample recovery watch the video.



The video shows wet grinding in the Planetary Ball Mill PM 100.

The graphic shows the result of grinding barium titanate at 500 rpm in the PM 200. After 5 h of pulverization in heptane and oleic acid mixture with 0.5 mm grinding balls, the D90 value of the original sample was reduced from 15 µm to 95 nm.



Grinding of barium titanate in heptane and oleic acid mixture with 0.5 mm grinding balls.
Blue curve: original sample; green curve: pulverized sample after 5 h.
PLANETARY BALL MILL PM 200EASYFIT GRINDING JARS FOR EXCELLENT RESULTS
The performance and the result of sample preparation are also determined by the choice of the grinding jar and its ball charge. The EasyFit range of jars has been specially designed for extreme working conditions such as long-term trials, even at maximum speed of 800 rpm, wet grinding, high mechanical loads and maximum speeds as well as for mechanical alloying. This line of jars is suitable for all RETSCH planetary ball mills.

The new EasyFit grinding jar series features a structure on the bottom of the 50-500 ml jars called Advanced Anti-Twist (AAT). This ensures that the jars are tightly fixed without the risk of twisting, even at high speed, and that wear and tear is drastically reduced. Secure clamping of the jars is made much easier: to find the correct clamping position, a maximum twist of 60° is required.

The geometry of the EasyFit jars in the 50 ml and 250 ml sizes has been enlarged in diameter and reduced in height compared to the previous "comfort" models. This offers two advantages: better grinding results and interchangeable lids, as there are only three diameter dimensions for the entire grinding jar range.

Diameter categories

Diameter 1: 12 ml and 25 ml grinding jars
Diameter 2: 50 ml, 80 ml and 125 ml grinding jars

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Available jar sizes: 12 ml / 25 ml / 50 ml / 80 ml / 125 ml
Innovative Advanced Anti-Twist (AAT) function ensures secure fit of grinding jars
High flexibility thanks to suitability of three lid sizes for all seven jar sizes
Pressure-tight and dust-proof O-ring sealing prevents material spillage
Jars and balls available in 5 materials: hardened stainless steel, tungsten carbide, agate, sintered aluminium oxide, zirconium oxide
Stainless steel protective jacket for agate, sintered aluminum oxide, zirconium oxide and tungsten carbide grinding jars
A groove between jar body and lid allows for easy opening of the lid, e. g. with the help of a spatula, if there are underpressure effects inside the jar


JARS & LIDS FOR SPECIAL APPLICATIONS
For colloidal or wet grinding, the use of a grinding jar with a special closure device is recommended
The special closure device is designed for ergonomic handling
Aeration lids are designed for working under inert atmosphere, for example if oxygen can influence the grinding process or the mechanosynthesis. The lids allow the introduction of gases like argon or nitrogen into the grinding jar.
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Aeriation lid

PLANETARY BALL MILL PM 200RECOMMENDED JAR FILLINGS
To produce optimum grinding results, the jar size should be adapted to the sample amount to be processed. The grinding balls are ideally sized 3 times bigger than the largest sample piece. Following this rule of thumb, the number of grinding balls for each ball size and jar volume is indicated in the table below. To pulverize, for example, 50 ml of a sample consisting of 3 mm particles, a 125 ml jar and grinding balls sized at least 10 mm or larger are recommended. According to the table, 30 grinding balls are required.
Grinding jar
nominal volume
Sample amount
Max. feed size
Recommended ball charge (pieces)
Ø 5 mm
Ø 7 mm
Ø 10 mm
Ø 15 mm
Ø 20 mm
Ø 30 mm
12 ml
up to ≤5 ml
<1 mm
50
15
5
-
-
-
25 ml
up to ≤10 ml
<1 mm
95 – 100
25 – 30
10
-
-
-
50 ml
5 – 20 ml
<3 mm
200
50 – 70
20
7
3 – 4
-
80 ml
10 – 35 ml
<4 mm
250 – 330
70 – 120
30 - 40
12
5
-
125 ml
15 – 50 ml
<4 mm
500
110 – 180
50 – 60
18
7
-
250 ml
25 – 120 ml
<6 mm
1100 – 1200
220 – 350
100 – 120
35 – 45
15
5
500 ml
75 – 220 ml
<10 mm
2000
440 – 700
200 – 230
70
25
8