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25.08.2016  |  11841x
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S-JET® System
S-JET® System

Dry Finest Grinding into the Submicron Range

Fivefold Increase in Throughput

During every grinding process whether wet or dry, fine particles have a tendency to reagglomerate. This tendency increases as the particles become finer.

During dry-grinding this formation of agglomerates causes a decrease in throughput capacity and reduces the process efficiency. The classifier in a fluidized bed jet mill cannot discern individual fine particles, but rather recognizes the agglomerate as one large particle which is then reintroduced into the grinding process. In a closed system such as a fluidized bed jet mill, the agglomerates thus remain in the mill, ostensibly to be ground even finer.

Prevention of Reagglomeration

In particular for the S-JET® process by NETZSCH Trockenmahltechnik, in which steam is used as a grinding medium instead of air to give higher capacities and to open up new ranges of fineness (submicron) for the dry-grinding sector, the stabilization of the finest particles produced is of great importance. This is done by adding suitable dispersing agents. If the amount of dispersing agent added is approx. 0.1 to 1 %, this decreases the electrostatic surface charge thus reducing reagglomeration. Depending on the product and additive used, the result is not just a fivefold increase in throughput, but also an improvement of the flowability, an increase in the surface area and a reduction of product deposits in the mill.

Use of Dispersing Agents

In the NETZSCH S-JET® process dispersing agents can be added in solid or liquid form. Solid agents are fed directly into the feed product via a dosing device whereas liquid agents are usually added via a dosing pump directly into the fluidized bed jet mill.

Company information

Netzsch Lohnmahltechnik GmbH
Netzsch Lohnmahltechnik GmbH
Netzsch Lohnmahltechnik GmbH is a service company with locations in Bobingen (company headquarters and administration) as well as the facility in Hanau and is part of the Business Unit Grinding & Dispersing in the Netzsch Group. As a leading international company, we also offer toll services for the wet grinding sector, which are performed at our location in Selb. We work with an ultra-modern and diversified selection of machinery for mechanical processing of a variety of materials. In addition to a pilot plant for product development and processing of small quantities, our state-of-the-art laboratories offer additional technologies for diverse analyses and quality assurance. We are mindful of providing the highest quality in all processes. The service we provide for your application also includes eminently important factors such as packaging, labeling and warehouse logistics, which our specialists adapt to your requirements with speed and flexibility. Hazardous materials are handled with exceptional professional responsibility. We also offer contract services in the area of wet grinding and dispersion of powders in liquids. Challenge us – we`ll work closely with you to find a customized solution. Whether the finest classification, demanding grinding tasks, or the related analyses – we always offer you a quick and professional solution. This allows you, for example, to bridge temporary capacity bottlenecks, introduce new products or outsource your own production without the investment risk. With our two locations in Bobingen and Hanau, we are always nearby and, as a company with world-leading processing technology, we offer you everything from one source – ISO certified and Made in Germany. See for yourself. We combine tradition, know-how and pioneering products in excellent quality and technology.
Last update: 06.06.2023
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