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What is the Dust and How it is generated?

 

“Small solid particles (conventionally taken as those particles below 75 mm in diameter), these settles under their own weight but which may remain suspended for some time”.

It is generated by natural forces, for example Wind, volcanic eruption, etc.

 

By mechanical or man-made processes for example

Crushing,

Grinding,

 Milling,

 Drilling,

 Demolition,

 Shoveling,

 Conveying,

 Screening,

 Bagging,

 Sweeping etc.

 

Why we should know about the Dust?

Dust is a nuisance.

It reduces visibility, causes discomfort.

Often creates irritation and causes can large amount of machinery to damage.

Some kind of dust just more than nuisance like coal dust form explosive mixtures with air.

Other dusts may be toxic or even radioactive.

Can cause Skin related disorders like dermatitis if exposed to certain dust.

Inhalation and retention of dust in lungs can cause lung diseases refers to term ‘pneumoconiosis’.

Airborne Transmission of pathogens (bacteria, viruses, and fungus) is possible through dusts.

Some minerals like asbestos are extremely hazardous, they have ability to lodge in lung tissue (alveoli)

And can promote disease such as mesothelioma, a form of lung cancer.

Other minerals may contain potentially toxic elements, such as certain heavy metals.

 

How we can control the exposure to dust?

Prevention of dust getting air-borne at the source.

Implementing wet methods.

Dilution and suppression of air-borne dust.

Industrial ventilation systems.

Enclosure or isolation of the dust source.

Electrostatic Precipitates to separate dust particles from exhaust gases.

Layer the granules on dust to prevent it to airborne.

Consulting the material safety data sheet (MSDS) for the product.

Wash hands before eating, drinking, or smoking and at the end of your shift.

Using appropriate respiratory protections like nose mask, Face mask etc.

Copied by: MASA

 

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