This innovative air jet mill is capable of fine grinding all kinds of dry products with virtually no contamination.
Through this specialized milling concept, product grinding is entirely autogenous. Gas jets alone create the grinding energy. No tool wear occurs!
An integrated dynamic air classifier in the housing can be infinitely adjusted to the desired fineness. This guarantees exact adjustment of the grinding parameters and reproducible product quality.
Even the hardest of products poses no problem for this machine. In addition, extremely temperature sensitive products such as wax can be processed under continuous operation.
- Finenesses from d97 < 2 µm to d97 70 µm (based on limestone)
- Air jet mill for the ultra-fine grinding of soft to hard materials in a fluid bed
- Newly developed grinding methods e-Jet® and s-Jet® (patent pending)
- Exactly defined maximum particle size through integrated dynamic air classifier
- Vortex free fines outlet with expansion chamber to reduce circumferential speed and wear as well as buildup of residues
- Classifier wheel with exchangeable, simultaneously rotating immersion tube to achieve highest finenesses, unlimited adjustment
- Gap between classifier wheel and fines outlet rinsed by gas for highest possible prevention of coarse grains
- Classifier shaft seal rinsed by compressed gas to protect the bearings
- Entirely autogenous grinding - no tool wear - no contamination
- Warming of product prevented by grinding with cooled gas (20°C), therefore applicable for extremely temperature sensitive materials
- Significantly lower compressor capacity as opposed to comparable jet mills
- Highest finenesses and maximum throughput achievable with just one classifier wheel
- Hinged classifier head provides good access for fast and easy cleaning and maintenance
- Reproducible results
- Optional designs available: pressure shock resistant, gas tight, inert
The new e-Jet® System (efficiency, economy, ecology)
Where air jet mills not economical for your product and application in the past? Not anymore! We have closely examined the energy efficiency of this technology. The result is a completely new grinding method.
Until now air jet milling, due to its energy consumption, was only cost efficient when applied to high value products. Now many other materials can be economically processed in our fluidized bed jet mills.
Economy is only one of the distinguishing features of our new e-Jet® System (patent pending). Process optimization through the adaptation of grinding conditions provides energy savings of up to 30 % compared to the conventional operation of air jet mills. Products that in the past could only be economically processed in mechanical mills, can now be micronized even more economically in our CGS Fluidized Bed Jet Mill using the e-Jet® System.
Convince yourself! This energy efficient milling system is now available for direct comparison in our laboratory in Hanau!
The CGS Fluidized Bed Jet Mill is a fluid energy impact mill that has gas nozzles positioned around the mill housing. The high velocity gas jets from the nozzles accelerate particles up to 540 m/sec.
Size Reduction of Talc: In most cases industrial mineral manufacturers do not consider jet mills to be an economical alternative for material processing. However, talc is one exception, with high added value and a growing market. The specifications are also getting more strict leading to the advantage of a higher technology process.
Typical toner products have a D50 in the range of 5 µm – 7 µm. NETZSCH Trockenmahltechnik GmbH entered the field of toner processing with the development of the CGS Jet Mill in the 1990’s followed by the CFS/HD-S High Dispersion Air Classifier a few years later.
NETZSCH has developed new methods in wet and dry processing which enable a mineral processing that matches the requirements of current and future markets.
NETZSCH Fluidized Bed Jet Mills set future trends for the fine grinding of dry materials.
Products that in the past could only be economically processed in mechanical mills, can now be micronized even more economically in our CGS Fluidized Bed Jet Mill using the e-Jet® System.
Our long-term experience with a diversity of products in these fields, is available for your toll grinding needs.
NETZSCH Trockenmahltechnik GmbH, one of the global leading companies in the area of dry product processing, is part of the Business Unit Grinding & Dispersing of the NETZSCH Group. Customers profit from our comprehensive experience potential and our diverse machine program, ranging from laboratory- and production machines to complete production lines. Fine impact mills, classifying- and jet mills as well as fine-cutting mills and high-efficiency fine classifiers made by NETZSCH are mainly used in the application areas chemistry, inorganic materials/minerals, ceramics and life science for pharma- and food applications.
In the ceramic industry the mechanical treatment of raw materials, processed or finished powders is an important part of many production processes. At the same time the grinding- and classifying processes are also of primordial importance, in order to ensure a range of particle sizes which is usually exactly defined for the particular process. The grinding principle of jet milling has proved itself to be particularly effective for the grinding of ceramic and abrasive materials. They can be ground to high finenesses, with an exact upper particle size limit, in one working step.
Sofraced, the only company in France to manufacture ceramic powders for use in dental prostheses, has decided to diversify its grinding processes. At first glance, this seems simple, but the new process requires a ceramic powder devoid of all traces of other materials, in order to prevent alterations in its color and bio-compatibility. Ceramic is highly abrasive. NETZSCH Trockenmahltechnik GmbH, builder of grinding machines and equipment was asked to assist in finding some good solutions. This was not always easy!
In addition to its well-known blackening ability, the other notable characteristics of graphite are its high temperature and oxidation stability, its resistance to chemical acids, its excellent lubricity as well as its electrical conductibility. Aside from"natural graphite", a particularly typical kind mined from deposits, which is processed after extraction, graphite can also be produced synthetically. The "natural process" is carried out within several days or weeks in resistance furnaces using carbon carriers, such as petroleum coal.
Fluidized-bed jet mill for organic pigments
Mechanical treatment of raw, consumable or prefabricated materials is an important part of many methods of production in the chemical industry. Numerous steps of a wide variety of production methods are necessary to obtain the desired finished material. The fluidized-bed jet mill enables organic pigments to be processed to a high fineness with a maximum particle size.
Air classifiers are used for the classifying of dry bulk products. They are either used on their own, independently, or as an integral part of a mill. Up until now a large amount of complicated equipment was required in order to obtain finest cut points even at high capacities. This is why up to 8 classifier wheels were used. However, there are alternatives.
The interest in finer, dry products has led to the development of more efficient jet milling processes. The first part of the paper describes the thermodynamic basic principles for generation and application of steam, and compressed gases. Practical experience has shown that in the aspired fineness range stabilization during grinding provides an enormous potential for improvement. Some selected examples demonstrate that the energy requirement can be reduced by a factor of more than two by suitable choice of stabilizers.