The Solution for Continuous Fine Grinding

Fritsch recommends the Disk Mill PULVERISETTE 13 for all processing laboratories with a continuous delivery of brittle to very hard materials for batch or continuous fine grinding. The maximum feed particle size is approximately 20mm edge length. The fineness attainable (d50) is down to approximately 12mm (largest gap width) or 0.1mm (smallest gap width). The maximum throughput of 150kg/h depends on the gap setting and the hardness of the sample. The relatively large throughput enables it to be used in the pilot scale or in the small size production, for example: slag-disintegration for the reclamation of precious metals.

Typical fields of application include: mining and steel industries (ores, coal, coke, slags); ceramics (steatite, sintered ceramics, electrotechnical porcelain, fire-proof clay); rocks and soils (bauxite, slags, quartz, clinker, gypsum, chalk); glass (frits, glass types, raw materials); and soil research (dried soil samples, sewage sludge, hydrological sediments, drilling cores) The material to be ground is crushed between two counteracting grinding disks with course radial toothing on the inside as a result of compressive and shearing stresses. The staged toothing means that the material is pre-ground in the inner chamber of the grinding disks before being finely ground in the outer chamber.

The gap width between the two grinding disks is set from the outside – also during operation – and determines the fineness of the end product. Performance features include: reproducible grinding results through accurate gap setting (exactly 0.1mm); precision adjustment for setting gap; sight glass for checking gap width; centrally located toggle-type fastener for grinding chamber; divided, hinged grinding chamber; four different materials for grinding disks, to ensure that contamination of the samples through abrasion of the grinding elements is avoided during processing; grinding disks easily accessed and replaced; life expectancy of grinding disks can be doubled by changing the rotational direction of the motor; and simple cleaning and dust-free grinding due to dust exhauster connection.