Four kinds of glass

Sample has been pre ground with our Jaw Crusher PULVERISETTE 1 Model I. Lateral support walls and crushing jaws can be equipped with zirconium oxide too.

With standard geometry, a rapid grinding of sample can be provided. Still particles with a maximum length of up to 9mm can be found afterwards.

It is possible to change geometry so only particles up to ~ 5mm length will be found afterwards, but grinding time will become increased immensely.

A grinding of higher amounts should be possible without any problems.

After only 30s, the complete amount of sample has been pre ground. See following result for fine grinding.

After 2:40 minutes of grinding, almost all sample use to be ground to fine particles with a maximum height of 100µm. Length or width can be much larger (depends on brittleness of the ground sample).

Achieved fineness has been determined by sieving an aliquot with our Vibratory Sieve Shaker ANALYSETTE 3 Pro and a test sieve with 100µm mesh. It has been found, that 33,3% of particles use to be < 100µm.

As requested, ground sample has been fed a second (+ 40s) and third time (+ 40s; totally: 4 minutes of fine grinding) into the machine.

After the third feeding, fineness has been checked by sieving again. Now, 44,1% of sample use to able passing a 100µm test sieve.

This uses to be a common result. When one dimension of particle use to be ground to < 100µm, a further reduction of particle size is limited with Disk Mill PULVERISETTE 13.

Usually about 8g (±3g) of residue (statically charged or loose laying on the fixed disk) can be brushed out of the grinding chamber afterwards.

If following chemical analysis will be prepared with this ground samples, we like to mention that we have a high throughput of different kinds of sample (e.g. our grinding disks made of zirconium oxide use to be covered with pure and elemental silicone which could not be removed by standard cleaning procedures). For this, we recommend checking our homepage for elemental analysis to see, what kind of elements should become found afterwards.

Also the housing of our application laboratory Disk Mill PULVERISETTE 13 is not coated with the optional plastic coating. For this, also traces of iron or chromium might be found too.

Previously, sample did become pre ground with our Jaw Crusher PULVERISETTE 1 Model I (1kg; 6cm long pieces to < 9mm, after ~ 30s). With a particle size of < 9mm length, sample can get ground with a planetary mill like this trial will show.

Usually particles tend to start sticking, when a fineness of d50 < 30µm will be reached. But in this case, sample starts sticking very early. To reach 100% < 100µm as desired, we recommend a grinding in suspension (e.g. with water or organic solvents).

Achieved fineness has been determined by sieving an aliquot with our Vibratory Sieve Shaker ANALYSETTE 3 Pro and a test sieve with 100µm mesh. It has been found, that 47,0% of particles use to be < 100µm.

Previously, sample did become pre ground with our Jaw Crusher PULVERISETTE 1 Model I (1kg; 6cm long pieces to < 9mm, after ~ 30s). With a particle size of < 9mm length, sample can get ground with a planetary mill like this trial will show. With a particle size of < 9mm length, sample can get ground with a Vibration Cup Mill like PULVERISETTE 9.

We are guessing that the maximum amount of sample, which can be filled into the 100ml grinding set, will be about 200g.

In this case, 175g of sample use to start sticking lightly to the grinding set after the first minute. A longer dry grinding of sample is not recommended.

Achieved fineness has been determined by sieving an aliquot with our Vibratory Sieve Shaker ANALYSETTE 3 Pro and a test sieve with 100µm mesh. It has been found, that 60,4% of particles use to be < 100µm.