Iron ore

With smallest possible gap setting (100µm), resulting particles will show a height of up to 100µm, but length and width can be much higher (depending on sample, up to 300µm).

After 4 minutes, all sample has been ground successfully. By sieving an aliquot with our Vibratory Sieve Shaker ANALYSETTE 3 Pro, a fineness of 36% < 90µm has been determined .

Before sample can be ground to max. fineness, up to 4cm long pieces need to be pre ground. For this our Jaw Crusher PULVERISETTE 1 has been used.

After 30 seconds of grinding, all sample has been ground to ~ 1cm length. This size will be suitable for grinding in a planetary ball mill (see result 3).

After 10 minutes of dry grinding, sample starts sticking lightly to bowl and balls. Because of high metal content, iron flakes use to form. A longer dry grinding is not recommended.

Surely a grinding with bowls and balls made of hardmetal tungsten carbide will decrease grinding time (because of higher density).

Fineness has been determined by sieving an aliquot of ground sample with Vibratory Sieve Shaker ANALYSETTE 3 Pro.