Apple (brittle, dried)

For a daily grinding of higher amounts, we recommend using knives made of hardmetal tungsten carbide (WC) for a longer durability.

After sample has been embrittled in liquid nitrogen, complete sample amount has been fed within 80 seconds.

Higher amounts of fine ground dust can escape the used feeding funnel for long and bulk solids. After totally 90 seconds, all sample has been ground successfully.

Small amount of residue use to remain inside of the grinding chamber. We are guessing that a higher amount (500-1000g as desired) can be ground without a cleaning step in between.

For a faster grinding, additional chilling, avoiding of escaping dust by the feeding funnel, we recommend using the sample exhauster system with cyclone separator (see result 2).

For a daily grinding of higher amounts, we recommend using knives made of hardmetal tungsten carbide (WC) for a longer durability.

Without embrittlement, sample has been fed constantly to the feeding funnel. Active cyclone removed ground sample directly after it was able passing the trapezoidal openings of the sieve cassette.

After 20 seconds, the whole sample has been fed to the feeding funnel. After 25 seconds no further grinding sound has been observed. As expected do dust escaped the feeding funnel during grinding. All sample has been ground successfully. Grinding chamber use to be almost free of residues. A grinding of higher amounts (0,5-1kg as desired) should be possible without any problems.

With the cyclone separator, sample always remains at room temperature. For this, no moisture will attach on cold surfaces (like it might happen after embrittlement).