Image courtesy of Tietjen.
Following the launch of the FD32 Pro hammer mill, Tietjen is continuing the series and introducing the FD 24 Pro hammer mills. These have been specially developed for the fine grinding of fat and protein-rich recipes for fish and pet food production.
The proven characteristics of Tietjen hammer mills, such as robustness, ease of operation and smooth rotor running, have been retained and supplemented with innovative details. For example, the rotor diameter has been increased by 100 mm to achieve a higher circumferential speed of the beaters. In addition, the distance between the hammer tips and the screen has been reduced, reducing clogging of the screen openings in high-fat and high-protein recipes.
In the FD 24, the grinding chamber is 1200 mm long and divided by a centre wall, making the 600 mm wide screens easy to handle. The screen area is 3.6 m² (5,580 sq in), with four screens used per chamber segment. A special screen fastening seals the screens so that no oversize particles can get into the product.
The particle size distribution can be specifically influenced towards finer structures with a narrower grain size range if impact plates are used instead of the upper screen. Additional impact zones between the screen segments create further opportunities for optimization. This allows larger screen apertures to be used without compromising product quality – resulting in energy savings.
In operation, the FD 24 Pro impresses with its ease of maintenance and efficiency. Sliding doors on both sides of the machine facilitate access when changing screens and beaters. The beaters are changed using the proven beater frame system. The result: faster service, short downtimes and a more energy-efficient operation overall.