Grinding System Discus

The NETZSCH Discus system is the quantum leap in disk grinding technology. The further optimized Discus disk agitator combined with the NETZSCH DCC® separation system guarantees you extremely high throughput rates with significantly narrowerd well time distributions and therefore more intensive grinding with uniform impact intensity.

The power input of the mill increases considerably, with a simultaneous increase in energy efficiency. The Discus grinding system activates and optimizes the movement of the grinding beads between the disks, which leads to a higher power input and a grinding efficiency with low specific energy consumption. Thus, you profit from a significant reduction in production costs, since the specific energy consumption decreases with increasing productivity.

Your Benefits


  • Reliable scale-up
  • Variety of sizes
  • High length/diameter ratio
  • Highly-efficient grinding media separation system
  • Optimum cooling water flow∙Inner pipe of grinding tank
    made of NETZSCH-Ceram C
  • Highest throughput rates
  • Significantly narrower residence time distribution
  • Intensive grinding with consistent stress intensity
  • Highest power input
  • Low specific energy requirement
Design and Principle

Design and Principle

  • Continuous agitator bead mills with horizontal disk agitator
  • With the Discus grinding system, the movement of thegrinding media between the disks is activated and optimized. This leads to a high power input and a grinding efficiency withlow specific energy consumption
  • The product flows axially from the inlet through the grinding chamber and is stressed by the shearing, pressure and impactaction of the grinding beads and thus ground or finely dispersed
  • A highly effective centrifugal separation system allows the product to flow out, while the grinding beads are retained inthe mill


The next Generation of Agitator Bead Mills

NETZSCH-Feinmahltechnik GmbH has now developed the new Alpha® modular machine platform. Compared to earlier-generation machines, this series is designed such that different grinding systems can be mounted on the same base platform as appropriate for a defined drive capacity.

Horizontal disk mill System TetraNex® Type Discus

The disk grinding system sets new benchmarks regarding capacity and flexibility. You profit from well-engineered technology that has already been proved for processing different products.

The Separation System is the Key

The highly efficient, dynamic centrifugal separation system facilitates the use of grinding beads of various densities, matched to the application. In addition, it allows the use of  grinding beads up to 0.4 mm in diameter. The separation system ensures that the mill can be operated far below the critical point of grinding bead compression, even for products with challenging rheological properties.This means that operational performance is extremely stable, shutdown due to overpressure and exceeding the permitted temperature limits is avoided and grinding media wear is minimized. The classifying rotor increases the service life of the separation screen and thus minimizes maintenance work and downtimes.

How it works

  • Product enters the preclassifi-cation area through the axial gaps in the last grinding disk
  • Entrained grinding beads are centrifuged outward in this area, while the product enters the separation chamber axially through the openings in the pre-classifier disk
  • Formation of a circulation flow through the rotor, which counteracts the axial flow of the material being processed

Focus on your Benefit

  • Use of very small grinding media even with high product viscosities and throughput rates
  • Maximum relief of load on the screen through the provision of a pre-classifier disk

Optimum Grinding Bead Activation

TetraNex® – The grinding system for optimum energy input

The NETZSCH Discus agitator bead mills are equipped with the TetraNex® grinding system. The TetraNex® grinding disk, which replaces the familiar TriNex® grinding disk, is available in the standard design and in the TetraNex® Plus version. While the front side of the standard version is smooth, just like the TriNex® version, the TetraNex® Plus disk has special activation elements. These activate the grinding beads reciprocally in the axial direction, which leads to increased contact between the grinding beads and thus to more effective grinding processes




The next Generation in Wet Grinding - NETZSCH-Feinmahltechnik GmbH has now developed the new Alpha® modular machine platform. Compared to earlier-generation machines, this series is designed such that different grinding systems can be mounted on the same base platform as appropriate for a defined drive capacity.

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