ESTA Absaugtechnik & -anlagen

Dust

FAQs about dust

Whether welding, grinding or casting: In many processes, dust or fumes arise which are a burden on the health of personnel and the environment.


The specific properties of the medium concerned are important for the type of extraction, such as for example the grain size, batch weight, moisture content or temperature.

What is dust?

Dust consists of visible and invisible, floating and deposited particles of solid material. The larger the particles, the less they can float in the air (depending on type and properties); the weight of the particles is not important. If the particles are very small, such as metal dusts, the dust will remain permanently in the air and not drop down.


When assessing the risk to health from dust particles, the size of such particles plays an important part as does their chemical composition.
 

Limits

The OEL (occupational exposure limit) is defined as the maximum concentration of a harmful substance in the air at the work place.

The contact with dust can be cause illness if

  • The concentration is very high
  • The dust particles are small enough to allow them to reach deep into the lungs (alveoli) via the windpipe and trachea
  • The shape of the particles (e.g. Fibres) is beneficial for ingestion
  • The dust contains poisonous substances


The specific properties of the medium concerned are important for the type of extraction, filtration and transport of dusts. The various types of dust vary based on the grain size, bulk weight, moisture content, temperature and other key figures (for example, abrasiveness, hygroscopicity). These factors have a considerable effect on the design of the extraction system.

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