GRIESKIRCHEN, AUSTRIA — Three Bühler matador impact machines are being used at the Haberfellner Mill in Grieskirchen, Austria. To assure the best possible flour and semolina quality the modern matador machine series deactivates potential insects and their eggs in flour and semolina at a success rate of up to 100%, Bühler said.

Three Matador MJZH by Bühler have been in use at Haberfellner Mill since November 2014. During the development of the new line of impact machines special attention was given to design of the sealing rings ensuring an even longer service life, Bühler said. 

“Our new impact machines have been running continuously, 22 to 24 hours per day from Monday to Saturday, without any problems or breakdowns since they were commissioned," said Joachim Kaar, plant manager for Haberfellner and responsible for production. “We are extremely satisfied with Matador. In addition to its high reliability, I particularly like the improved efficiency and extremely high degree of deactivation. “Since we’ve started using the Bühler machines, the risk of contamination by insect eggs has been virtually eliminated.” 

Haberfellner’s satisfaction with Bühler has a long tradition. Since the first large new mill was constructed in 1966, the Upper Austrian family business relies almost exclusively on Bühler as a technology partner, the company said.

The effectiveness of the impact machines is amazing because insect eggs are deactivated with great efficiency, Bühler said. Compared to other technologies for combating insect eggs, the success rate of the impact machines is very high. In contrast to thermal or chemical methods impact machines can also be used directly for the end product without impairing quality.

Bühler developed the impact machine Matador MJZH specifically to kill insect eggs and for use before bagging or storing flour and semolina. The impact machine Matador MJZH is available in five finely graded sizes - with throughput capacities from 1-45 tph. All sizes share high levels of efficiency while achieving mortality rates of more than 99.5%, reliable, continuous operation, and low operation and maintenance costs. Process safety is ensured with a sensor system which monitors for optimal operating condition.

The MJZH is designed in accordance with the cross-flow principle. This allows high product performance with a low specific energy use and makes the Matador significantly different from the previous impact machines, which were designed following the radial principle, Bühler said. The advantages of the cross-flow principle: unchanged flow conditions even with wider machines; optimal functioning at any installation location; impeller and housing shapes which are conducive to flow; long-lasting functionality because of its sturdy construction; and the possibility to position it outside of the conveyor plus less energy consumption.