Jet-Mill

New standards in product fineness

Energy-efficient ultra-fine grinding
with precise classification

The spiral jet mill from PMT-Jetmill sets new standards in terms of energy consumption and product fineness.

The integrated dynamic classifier, known as the rotor-motor unit, allows peripheral speeds of up to 190 m/s with rotor discs made of a high-strength aluminum alloy. This enables products with particle sizes in the low micrometer range and, depending on the material, even below 1 µm.

The fineness can be easily adjusted by changing the classifier speed. The specially developed feed rate control, together with the optimized grinding air nozzles, ensures optimum utilization of the available energy.

Either compressed air (3.5 to 15 bar) or superheated steam (up to 24 bar and 400 °C) can be used as the grinding medium.

In addition, a continuous discharge device allows unwanted, hard-to-grind impurities (e.g., quartz) to be removed from the grinding chamber, thus significantly reducing their proportion.

PDF Download

PMT jet mills Single systems - Specifications

More than grinding

Process integration in ultra-fine grinding

Co-grinding – precise, homogeneous composition

In co-grinding, several raw materials are fed simultaneously into the grinding chamber via the fully automatic, load-dependent feeding system at a defined loading density and ground together. The fully automatic control system allows target recipes to be set directly in the grinding process. The intensive flow control in the grinding chamber results in a very homogeneous particle size distribution of the materials. The result is a co-ground product with reproducible composition and narrow particle size distribution without an additional mixing stage.

Co-grinding with jet-mills from PMT Jetmill GmbH

Z

Defined recipe setting directly in the grinding process

Z

Homogeneous distribution of all materials across the entire particle size distribution

Effective wear protection

We offer replaceable sheet metal inserts made of highly wear-resistant steel (e.g., Hardox®). The plates are bolted or welded, are easy to replace, and protect the grinding chamber for longer service life while also being easy to maintain.

One option is CPS1 welded armor, which is applied directly to highly stressed surfaces with a layer thickness of approx. 3 mm. The hard-alloy armor forms a tough, hard wear zone with very good adhesion, significantly reduces material wear, and stabilizes the flow geometry.

Al₂O₃ ceramic linings are used for extremely abrasive or metal-free applications, either specifically in flow hotspots or as full linings. The high hardness and chemical resistance of the ceramic minimize wear, prevent metal contamination, and increase the long-term availability of the plant. At the same time, the flow geometry and separation characteristics remain constant over long periods of time, which significantly improves process stability, the predictability of downtimes, and compliance with strict quality and purity requirements.

Request now