Dust Suppression Solutions
DryMist™ Technology
Dust Down™ Dust Suppression Liquid
Construction Week Magazine Article

Dust Down™

Dust down
Dust Suppression Liquid


The Occupational Health and Safety Act, states that every employer shall provide and maintain, as far as reasonably practicable, a working environment that is safe, and without risk to the health of his/her employees. The presence of dust is a fact of life in many industries which handle or process a product such as coal, mineral ores and many others. It’s a constant effort to control dust emission.

What is dust?

Dust is defined as solid particles of sizes ranging between 0.1 to 100 μ (micron). Within this range, we have respirable dust is found up to 7μ. While all dust should is to be controlled to specified threshold limits, respirable dust is more important, especially where the dust is toxic. Airborne dust particles can be difficult to remove due to the fact that they are so small in size (0.1 to 10 microns). These particles drift everywhere and can be a significant health hazard. Respirable dust is not easily visible. Thus the absence of visible dust does not mean there is no dust at all. Dust is anything which escapes from a mechanical handling plant to become nuisance dust. This fugitive dust needs to be controlled.

What is dust control?

Dust Control is described as:

  • The prevention or limitation of dust being created.
  • The prevention or limitation of dust being liberated.

As prevention is largely impossible, limitation must be the focus.

Why control dust?

  • Maintenance Costs
  • Health Conditions
  • Explosion hazards
  • Safety
  • Environmental
  • Housekeeping Costs

Dust suppression types

There are two types of suppression methods.

Wet suppression - 1. objective is to bind dust and particles to the main product and prevent liberation during handling. However, to wet the product has its shortcomings. It can result in excessive water usage and also lead to excess moisture content in the product which may not be desirable. This method cannot be used on products which have any affinity to water.

Fine water mist -2. Engineers often look to control the problem by spraying a fine water mist to capture dust particles. The proven theory of the system is that if the dust and water particles are about the same size, they can and do bond. (Ventilation & transfer points)

  • This is due to the fact that large droplets (80 to 100 microns) will travel through the air and collide with very few particles on the way.
  • The air stream traveling around the much larger droplet deflects the dust particle away from the drop
    let, thus avoiding collision.
  • To capture a dust particle in the best possible manner it is required that the water droplets be the same size and weight as the dust particles.

Airborne dust - suppression with Dust Down™

  • How can the introduction of a surfactant help? Softening the water solves the following problems;
  • We are concerned with dust, particularly in the 1μ to 7μ range, this means droplets must be within this range for optimum results to be achieved. Soft water(reduced surface tension) forms small droplets easier and quicker that hard water.
  • Small droplets are created by energy being released at the nozzle. If this energy is insufficient, small droplets must then develop by evaporation. This is not ideal as it takes time to evaporate to the correct
    size. Droplets are directly effected by climatic conditions, yielding inconsistent results.

Before and after mist application

Coal mine: Without Dust Down™ With Dust Down™
Iron ore: Without Dust Down™ With Dust Down™
Diamond mine: Without Dust Down™ With Dust Down™
Gold mine: Without Dust Down™ With Dust Down™

Surface dust - suppression with Dust Down™

Stubborn dust clouds stirred by heavy vehicles are a constant concern on open pit mining operations and trafficked gravel roads (such as construction sites). Dust inhalation poses a health hazard, and, when it obscures visibility, becomes a prominent safety risk as well. Coupled with environmental concerns regarding plant life and air quality, dust is a challenge that needs to be adequately and sustainability dealt with.

Traditionally, water was being sprayed in the pit in an attempt to control the dust, however, this was not a very effective solution as the areas had to be sprayed six times a day. This involved a water truck traveling rugged roads and long distances back and forth to the pits, consuming large amounts of diesel, and, of course, using copious amounts of water. DUST DOWN™ is a bio-surfactant, which increases the ability of water to penetrate the road surface which enhances the suppression of dust.

Water mixed with Dust Down™ will

  • Speed up surface drying times
  • Reduce water application frequencies
  • Allow a single water truck to cover much greater areas
  • Will boost residual moisture from previous applications


  • Construction Sites
  • Haul Roads
  • Quarries
  • Temporary Stockpiles
  • Parking Areas
  • Mine dumps and workings


  • Dust Down™ can be applied using existing dousing equipment and no modifications need be made to machinery
  • Dust Down™ can be used on the roads near the pits and in the pits themselves, as it is a biodegradable
    able product and will not disrupt the beneficiation process by clinging to the ore. It is a South African developed product, which penetrates road surfaces to give a stable road surface layer
  • Dust Down™ does not have a sticky consistency, which ensures that roads and surfaces treated with the product do not develop a slippery surface
    when wet
  • Environmentally friendly, non-toxic and non-hazardous
  • Suitable for use with a variety of materials with compositions and characteristics
  • Reduces water’s tension which causes water to break into much smaller droplets
    Increases the wetting and penetration ability of water by more than a 100%
  • Causes a deep moisture penetration into dust and the roadbed
  • Easy to apply, no specialized equipment required
  • Roads can be trafficked immediately

Find out more: info@greensense.ae

Dust Down
Aggregate Plants
Asbestos Abatement
Barge and Ship Load-Out Facilities
Bulk Powder
Coal Dust
Construction & land development
Conveyor Drop Points
Dust Generating Equipment
Feed handling
Coal Dust
Construction & land development
Recycling facilities
Foundry Dust
Grain Silos
Ore conveyor systems
Quarries and rock crushing
Recycling plants
Slag works
Spray painting
Stock piles
Tub Grinders
Vehicle loading areas

Stop your dust pollution
Ensure a safer breathing environment
Less wear and tear on equipment
Save man-hours on cleanup
Prevent poor sight or dust irritations
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