Dust (Environmental) Testing

Understanding the dust/moisture relationship of a bulk material allows minimisation of water addition for dust suppression. This in turn assists in water conservation at mines and other handling facilities, as well as minimising the total moisture of the product.

Fines Dust Extinction Moisture (DEM) Testing (-6.3mm)

The moisture content at which a fines material is deemed to emit no dust is determined using a procedure set down in AS 4156.6-2000. This standard was written specifically for coal but has been utilised for other bulk materials by modifying the quantity of sample placed in the test rig. The actual weight of the sample is taken into account when determining the dust number.

Lump Dust Extinction Moisture (DEM) Testing (+6.3mm)

The moisture content at which a material is deemed to emit no dust is determined using a procedure set down in AS 4156.6-2000. This standard was written specifically for fines materials but has been utilised for lump bulk materials by adapting the procedure and altering the quantity of sample placed in the test rig. The actual weight of the sample is taken into account when determining the dust number. 

Wind Tunnel Dust Lift-Off

Wind tunnel test may be carried out in a medium scale wind tunnel to investigate the lift-off behaviour of bulk solids as they travel on uncovered conveyors or rail cars or being exposed to lift off from stockpiles. Tests may be carried out at different moisture levels, durations, surface wind velocities and with or without treatment including water only sprays, or sprays containing a solution of water and surfactant.

 

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