In the manufacturing industry, dust is something that you will be around all the time, but it can cause a catastrophe given the right conditions. Materials that you use every day can leave dust particles that are highly flammable and will burn quickly or explode, which could create a fire.
It is important that your team understands the dangers of dust in a manufacturing workplace to be able to help eliminate risks.
How dust can create a hazard
There are certain conditions that will make dust a highly dangerous substance
Dust from materials such as wood, sugar, coal, grain or plastic are highly flammable
Dust particles that might be in the air can be more oxygenated, also making them highly flammable
Build ups of dust concentrated in a confined area
A confined space inside a building
Concentrated piles of dust
An ignition source, such as open flames, hot surfaces, warm machinery or electrical discharges
An explosion caused by combustible materials in dust form is likely to be severe as a result of high amount of dispersed materials with a large surface area being exposed to air. In contrast, the same mass of a solid combustible material as a heap or pile will burn relatively slowly owing to the limited surface area exposed to the oxygen of the air. If there is an explosion, remove yourself from the area as soon as possible.
In 1981 an explosion at a plant in Banbury which manufactured custard powder injured nine men and caused substantial damage to an external wall of the building. A fault in a pneumatic conveying system caused a holding bin to overfill and the air pressure caused the bin to fail. The released custard powder ignited as a dust cloud within the building.
How to prevent dust build-up
Dust is usually a product of poor housekeeping, so by taking the following actions, you can reduce the risk:
Have a regular inspection for dust build up in all areas and make sure the residue is cleaned regularly
If you are near an ignition source, don’t use a cleaning method that will create a dust cloud, which could easily catch fire
Maintain and empty equipment that you use regularly, such as grinders, shakers and mixers to reduce the amount of dust that comes out of those machines
Prevent the release of dust particles from machines by using a sealant
Make sure that there are dust collectors when your machinery is running
Preventing dust from igniting
A source of ignition could come from anything that has a source of energy, such as a flame, electricity or hot surfaces. Make sure that you do the following:
Use vehicles, tools and welding and cutting equipment correctly
Make sure that dust is kept away from hot surfaces or hot equipment
Keep dust away from heat sources such as radiators or portable heaters
Ensure that all of your equipment is maintained to avoid dust build up or overheating
Did you know?
Layers of dust as thin as 0.8mm can become a hazard if not cleared
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