Very hard material with a feed size <100mm can now be reduced in size to an ultimate fineness of 0.1mm in a single operation
Wherever large pieces of brittle samples had to be prepared for analysis, many laboratories employed a jaw crusher such as Fritsch's Pulverisette 1 for the pre-crushing stage, since the original feed size was too large to be handled by the final grinding mill.
Previously samples could not be prepared for analysis in a single operation, because a jaw crusher could not achieve an adequate product fineness and because grinding mills can only handle a limited range of feed size.
Fritsch has applied itself to this particular problem and has developed a disk mill, Pulverisette 13.
In a relatively short processing time this mill can reduce material of a preset grain size to a fineness of minimum 0.1mm even when processing relatively large samples (up to 20mm edge length).
If the required fineness is of this order but the samples supplied to the laboratory include pieces with an edge length of over 20mm, Fritsch can supply what it calls the perfect solution for this problem: both units, and thus their advantages, are combined.
The Pulverisette 1 jaw crusher is mounted on a metal frame over the Pulverisette 13 disk mill, and the two units are connected by a specially designed hopper.
This combination enables sample reduction of the jaw crusher's maximum feed size (approx 100mm) to the disk mill's finest preset average grain size of approx 0.1mm in one single operation.
