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DIN 55992-1 Bestimmung einer Maßzahl für die Staubentwicklung von Pigmenten und Füllstoffen - Teil 1
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Particle and fiber analysis | DMT Group (DMT-Group.com)
Determination of the inhalable, thoracic, and respirable dust fractions according to DIN 481
DMT conducts investigations of dusting indicators using three variants with a rotating drum. The basic structure and processes are analogous in all three methods. A sample of the bulk material is set in motion within a drum of diameter d and at a rotational speed of n for a defined time t using entrainment plates. Airborne particles from the cascading bulk material are discharged from the drum by an axial imposed air flow V̇. The discharged particles are quantified in the subsequent analysis, and optionally, the particle fractions are determined. The process parameters d, n, t, and V̇ are specified in the respective standards and are specific to the standard, as is the particular analysis method.
| d = 14 cm | n = 30 min-1 |
| t = 300 s | V̇ = 20 l/min |
The discharged laden air flow passes through a horizontally oriented glass section, which fundamentally serves as a coarse separator or sifter. Subsequently, the finer particles are collected on an absolute filter and quantified gravimetrically. This results in a dimensionless parameter that relates the collected dust quantity on the filter to the initially used 100 g sample quantity.
Figure I: Test rig DIN 55992-1
