What is combustible dust and how does it lead to dust explosions?

Combustible dust, also known as explosive dust, is a by-product created from manufacturing processes that involve combustible raw materials. These materials include wood, light metals, several kinds of chemicals, but also agricultural products such as grain, spices, and tobacco. While practically invisible to the human eye, combustible dust particles are a deadly hazard in many workplaces and industries. Certain conditions can cause the dust to become explosive, potentially killing or injuring workers, and destroying machinery or even entire facilities.

What is a dust explosion?

Dust explosions are the result of high concentrations of combustible dust particles rapidly combusting inside an enclosed space. When mixed with oxygen, these fine particles can be ignited when coming into contact with a spark, metal ember, cigarette butt, or other ignition source. This quick combustion process is known as deflagration, and results in a high-pressure airwave.

As the airwave explodes out of its enclosed space, it will likely dislodge or stir up combustible dust elsewhere in the facility. This will mix the dust with the oxygen in the air, which will make the explosion bigger, and potentially fuel a second dust explosion – or even several. Some of these may occur inside other machines or containers, as the pressure wave and the fire propagate through the duct system. At this point, the risk of harm to human life, and of destruction of equipment or even entire buildings, is overwhelming.

Dust Explosion Pentagon

Which industrial processes typically create combustible dust?

Some examples of industrial processes that typically create combustible dust are blasting, crushing, cutting, grinding, milling, polishing, and sawing. 3D-printing by means of using powder can also generate combustible dust.

Combustible dust is a common issue that affects a wide variety of industries and work environments. The dust can gather in plain sight, but also in places where it may not be detected easily. This means that companies need to take action to maintain the safety of their workers and facilities.

Learn how proper housekeeping routines are important to improving workplace safety. The most important thing, however, is to make sure that your equipment can keep you and your colleagues safe, and effectively prevent dust explosions from causing destruction. Nederman has a long history of making products that safely handle combustible dust, prevent dust explosions from spreading. and can reduce the risks of combustible dust and dust explosions.

Contact a combustible dust expert in your area to get started on your clean air journey!