Short grinding time – Long service life

The HP-MA is suitable for grinding a wide variety of minerals such as cement raw meal, clinker, cement, slag, ores, oxydes and ferro-alloys. The high RPM of the drive motor guarantees a short grinding time even for hard materials. The robust construction with, e.g., dual bearing support for the eccentric shaft ensure long service lives.

Effective avoidance of cross contamination

After pulverizing the grinding vessel is automatically emptied and the ground material is made available at the discharge point. Three automatic cleaning features namely compressed air, sand cleaning (option) and wet cleaning (option) allow a sufficient material removal. Using the different cleaning functions, cross contamination can be reduced to a low ppmlevel. Furthermore, spoon sampling (option) during the material input provides the possibility to pre-contaminate the grinding with the subsequent sample.

Flexible Configuration

The HP-MA can be used as a stand-alone machine, with 30 or 60 position magazines, and in combination with the pellet press HP-PA or other components. Due to the modular design of the machine different and completely flexible configuration set-ups are possible.


  • Loading magazine with 30 or 60 cups
  • Wet cleaning device
  • Sand cleaning device
  • Cooling device for grinding vessel
  • Blank sample dosing device
  • Grinding vessel tungsten carbide
  • Grinding vessel chrome steel
  • Cleaning device for transport cups
  • Magnetic separator for extracting metallic particles from the sample

The solution for automatic pellet preparation- Modular design for maximum flexibility in each application

Area of application

Preparation of pellets in steel rings (40 or 51. 5 mm diameter) for x-ray fluorescence spectroscopy

Different materials, raw meal, clinker, cement, slag, ores, oxidic material, ferroalloys (feed size 100µm)

Operation mode
Automatic, standalone, standalone with magazine, linear automation, robot automation


Perfect quality of the pressed pellet
The HP-PA produces high quality pressed pellets with a smooth surface necessary for an optimal XRF results. The HP-PA achieves the desired uniformity and density of each individual pressed pellet with a maximum of reproducibility.

Avoidance of contamination
In the standard version of the press, the counter pressure plate of the die is cleaned with a brush which rotates in alternate directions. As an option, a Mylar film device effectively prevents material particles from becoming fixed to the counter pressure plate.

Program-controlled pelletizing for high reproducibility and throughput
All parameters necessary for the pelletizing process such as total pressing force, incremental increase and decrease of pressing force and pressure holding time can be preset. They are clearly presented on the HMI control panel and can be easily adjusted. Due to the program-controlled automatic sequence, every sample is processed identically and is not subject to human error. Furthermore, the automatic sample operation guarantees a high sample throughput whenever required.

Modular design
Due to their modular design, the HP-MA and HP-PA can be easily linked together or combined with other components. Fully automatic sample preparation systems can be put together in an individual way.
Most requirements of the customers can be fulfilled with the Herzog system. The modular design guarantees step-by-step retrofitting and numerous possible combinations with other machines. It is possible to combine, e.g., two individual machines with manual feed and manual discharge, to add an automatic connection with conveyor belts, or design a fully automatic operation with an airtube receiving station and direct connection to an XRF spectrometer. Furthermore, the HP-MA and HP-PA can be easily integrated into a largescale robot automation.


  • Cleaning device for cups
  • Loading magazine (30 or 60 cups)
  • Chute output magazine (30 or 60 cups)
  • Magazine for steel rings (30 positions)
  • Magazine for steel rings (2 x 30 positions)
  • Double dosing device
  • Transport mechanism for Mylarfilm
  • Magazine for pressed pellets (30 positions)
  • Magazine for pressed pellets (2 x 30 positions)
  • Magazine for steel rings (2 x 30 positions)