Powders: nature and treatment

Origin and physical-chemical characteristics of the dust!


It is defined as a solid powder with an average particle diameter between 1 and 100 microns. The powders are among the main pollutants in our atmosphere and are responsible for many diseases, and serious problems mainly of the respiratory organs, but not only. Relevant parameters, under the profile of the hazardous dust, are:

  • average size (represented by the so-called grading curve)
  • chemical characteristics

Physical and chemical characteristics

The average size of the powders have a direct effect on various relevant aspects such as:

  • Their breathability. Particles are inhaled and can enter directly into the blood tissue (below a certain size), while medium and coarse powders are retained in the outer systems of the human respiratory system and animal.
  • Their ability to propagate the flame.
  • Their behavior in relation to physical force (eg. Centrifugal force, gravity force, ...)

Do you want to learn more about: "Powders: nature and treatment"?

In relation to the size of the particles, we often talk about particle size or size distribution. These are tools and diagrams resulting from specific screening tests, which accurately represents the dimensional performance of the powders contained in a sample (gas exhausted from industrial process, for example). In the field of combustion, for example, it is very important to perform an analysis of the particle size.

The chemical characteristics of the powders also affect several important aspects:

  • The inflammability and explosiveness of these powders. Under certain conditions, the powders should be treated and managed using certified equipment built following specific regulations (see our article on powders and explosives and looks for insights about the ATEX directive and subsequent updates).
  • The toxicity of certain compounds show respect to others.

Origin and formation of dust

Dust originating from anthropogenic processes are derived by many operations, so that it is impossible to list them exhaustively. Among the main ones there are:

  • Storage Operations, handling, pneumatic conveying, mixing, weighing and packing of dry bulk solid materials.
  • Sanding operations, sandblasting, grinding, sanding, edging, cutting various kinds of surfaces and materials.
  • Operations typical of polymers, elastomers and thermosets industrial field.
  • Melting Operations of metallic materials, glassy and of other type.
  • Operations combustion of solid material and waste.
  • Painting Working with powder products
  • Drying operations of solid or similar material.
  • Operations of oxyfuel, plasma cutting, laser cutting
  • Mechanical cleaning Surface operations.
  • Welding work.

Technologies for the capture of the powders dispersed in a gaseous flow: dust filters


Do you want to learn more about: "Powders: nature and treatment"?

In order to limit the concentrations of dust present in a gaseous stream and fall within regulatory limits, you can recourse to the use of treatment technologies and abatement of various nature. These include:

Dry technologies

• Cyclones

• Multicyclones

• Bag filters

• Filters in cells

Electro filters

Wet technologies

• Scrubber, especially venture type.

See you soon with new interesting items!

Powders: nature and treatment / Info request

Send here technical requirements, for proposal or proposals for collaboration, we are committed to respond within 24 hours.

With reference to European Regulation UE/679/2016, read and acknowledged the Privacy Policy and the Website Terms and Conditions , I declare to give consent to:

privacy policy Tecnosida

promotion and marketing activities

The blog contained in this website does not represent a newspaper as it is updated without any periodicity and, therefore, cannot be considered an editorial product. The images published are, for the most part, taken from the internet (therefore considered public domain) or are property of Tecnosida srl. If their use infringes any third party right, we kindly ask you to inform the author of the blog and Tecnosida, so that he will promptly remove them. The same applies to the articles and videos found on the web and possibly reported and / or cited in this blog. All data, information, technical and non-technical image and all instructions included and presented in this blog are for illustrative and academic purposes only. Tecnosida declines any responsibility for damages to things or persons deriving from the application and / or use and / or publication of images, videos, information or instructions present in this blog.