Skipt to content

Mineralogy & Geochemistry Laboratories Synthesis methods Various mills

Synthesis methods Various mills 

Proper comminution and preparation of the sample plays a central role in the run-up to the analysis, as there is a dependency between the sample properties and the grain size. A carefully coordinated comminution process is realised depending on the feed grain size and the analytical fineness to be achieved for the subsequent analysis as well as the physical and chemical material properties of the sample (e.g. hardness and toughness). The Mineralogy/Geochemistry working group has a range of different comminution systems at its disposal for this purpose:

  • Material of the grinding sets Zirconium oxide (ZrO2), corundum (Al2O3) Special steel
  • (X210Cr12)S, agate, tungsten carbide (WC) °agate (SiO2*nH2O) – 10 ml,
  • *Stainless steel – 25 ml
  • Feed grain size ≤ 6 – 8 mm ≤ 10 mm, (≤ 15 mm)S ≤ °4 – *6 mm
  • Feed quantity 30 – 150 ml 10 – 150 ml, (≤ 250 ml)S max. °4 – *10 ml (Å~ 2)
  • Final fineness 10 – 20 µm ≤ 40 µm ~ 10 µm

Various mills

The Pulverisette and (Fritsch) mortar grinders, the RS1 and RS100 vibrating disc mills and the MM200 ball mill (Retsch) are available for grinding, mixing and homogenising fine powders. Hard, medium-hard, soft, brittle as well as partly fibrous and elastic material can be processed loss-free by friction, pressure, impact in dry and wet condition. Grinding duration, contact pressure and oscillation frequency (700, 1400 min-1), (3 - 25 Hz) are adjustable or can be digitally programmed in some cases and can therefore be adjusted to optimise the treatment of the material to be ground.

Laboratories

This translation in English is 3 days and 1 hours older than the original version (Deutsch) and may be slightly outdated. → View original in Deutsch if you are looking for any new developments.