April 21, 2021 - Application Day

The NETZSCH Application day informs you about news, trends and latest developments in the Chemical field. It is about recovered Carbon Black, Toll Grinding, Grinding of fibrous materials, Magnetic Properties of Rare Earth Magnets and Alumina from calcinated material.

Let yourself be surprised!

In five different webinars you can listen to and discuss with our experts about the latest solutions and developments from NETZSCH. Register and join for free!

Morning Session

08:00 - 09:00 AM*

Efficient Fine Grinding of recovered Carbon Black (rCB) with Fluidized Bed Jet Mills

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09:00 - 10:00 AM*

Toll Grinding - Wet and Dry Grinding Service

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10:00 - 11:00 AM*

Grinding of fibrous materials with optimized NETZSCH fine cutting mills type SecoMy® and SecoMy® S

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11:00 - 12:00 AM*

Improving Magnetic Properties of Rare Earth Magnets by Fine Grinding and Classifying

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12:00 - 01:00 PM* Alumina from calcinated material to ceramic slip Register here

*CEST (Central European Summer Time)

Afternoon Session

01:00 - 02:00 PM*

Efficient Fine Grinding of recovered Carbon Black (rCB) with Fluidized Bed Jet Mills

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02:00 - 03:00 PM*

Grinding of fibrous materials with optimized NETZSCH fine cutting mills type SecoMy® and SecoMy® S

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03:00 - 04:00 PM* Improving Magnetic Properties of Rare Earth Magnets by Fine Grinding and Classifying Register here
04:00 - 05:00 PM*

Alumina from calcinated material to ceramic slip

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05:00 - 06:00 PM*

Toll Grinding - Wet and Dry Grinding Service

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*CEST (Central European Summer Time)

More info about our lecture

This webinar gives an overview of the state of the art of jet milling technology. Due to the parameters it will become clear that new technologies were required on a dynamic market. Motivated out of this, NETZSCH developed two new systems. The economic e-Jet® system and the superfine s-Jet® system which is operating with overheated steam. It will be shown, that the s-Jet® system is not only for super fine applications, but also for very efficient grinding. The advantages will be introduced and the synergy with industries which already have a steam generation on sight will be shown.

Beginning with explanation and definition of toll grinding, the possible reasons for using services are discussed. An Overview of the processing possibilities and site location descriptions makes the potentials of toll processing round. To perform customer requirements optimally, our todays strengths have been developed. A clear differentiation identifies which materials are processed or not processed.

Storage and packing is organized according to customer’s request. Product quality, mainly particle size distribution, is guaranteed and ensured by using essential measurement equipment. Mechanical processing is realized by newest machine and plant technology and is under continuous upgrading and expansion.

Sustainability one of our main important goals and arises in our handling of waste and energy saving.

The SecoMy® and SecoMy® S range of NETZSCH fine cutting mills comprises rapidly running cutting mills with a high rate of cuts for the ultrafine grinding of cuttable materials, that cannot be ground by impact. In other words, materials that have to be ground in a cutting gap, e.g. temperature-sensitive materials, fibrous products, as well as materials for which good free-flowing properties, high bulk densities and a gentle grinding are required.

The standard fine cutting mills type SecoMy® with screen insert can be used with fine screen meshes for the production of products in the range down to 100 µm. The basic design allows highest production capacities compared to standard machines.

For finer requirements or temperature and lifetime problems of the screen meshes in operation, the solution is to use the fine cutting mill ­SecoMy® S. The screen insert has now been completely replaced by the installation of a rotating classifier wheel. After cutting, the ground product is transported to the classifier wheel by air currents and then classified in this area. Coarse product falls back into the grinding chamber. The fine product leaves the machine via the pipe outlet. The classifier wheel geometry, which has already been tried and tested in other NETZSCH machines, was further optimized for the application „Separation of fibrous Products“. This technology makes the SecoMy® S unique on the market.

During the manufacturing process of rare earth (RE) magnets, the material powder is ground before being pressed and sintered. Milling is an essential step because the particle size is critical to the quality and properties of the magnets made from the powder. Ideal is a narrow particle size distribution with the lowest possible fines content and a sharp upper grain boundary. RE alloy powders fulfilling these properties contribute to the achievement of improved properties of the magnets made therefrom.

A new grinding process for RE alloy powders, especially for Nd-Fe-B powders, is presented, which has a number of advantages compared with the conventional fluidized bed jet mills.

Fine graining (particles < 1 μm) is completely removed by classifying with a high-performance classifier. The d90 / d10 value after classifying is only about half compared with that of conventionally produced powder.

The use of these powders with narrow particle size distribution for the production of sintered magnets leads to a significant improvement in the magnet values achieved.

Among modern ceramics, alumina is the material that has found the widest application. In recent years, the trend towards ever finer and cleaner powders has intensified further into the nanometer range. In most cases, calcinated alumina up to a few millimeters in size is the starting material. Agitator ball mills in combination with dry mills can be the solution here, but must be specially adapted to the high requirements.