Application
Dust-free Truck and Ship Loading in Building Materials
Answer in brief
At a loading point the dust comes from the air the material drags with it, not only from the material.
Enclosing the falling column and extracting the displaced air removes most of the plume; filtering the yard afterwards does not.
- Enclose the column from outlet to pile.
- Extract the displaced air at the skirt.
- Keep the outlet close to the growing pile.
Reviewed October 21, 2026 · Updated October 21, 2026
The problem
Open loading creates a plume that escapes the site and attracts regulatory attention, and the fines lost are product.
Desired outcome
A loading arrangement that keeps the material enclosed to the pile, captures the displaced air and achieves the rate without a visible emission.
Process approach
Telescopic spouts with an outer dust skirt and integrated extraction suit powders, with level sensing to retract as the vehicle fills.
Cascade chutes slow the material instead, which suits coarse aggregates and very high rates.
The filter that receives the extracted air returns the fines to the stream rather than disposing of them.
- Spout or chute chosen for the material rather than for the supplier.
- Extraction and filtration sized for the displaced air volume.
- Level sensing and automatic retraction.
Selection factors
- Particle size and the fines fraction at loading.
- Loading rate at peak.
- Drop height and the vehicle geometry.
- Available extraction and filtration.
- Emission limits at the site boundary.
Common failure modes
- Open pipe loading creating a plume no filter can recover
- Skirt damaged and leaking at the pile
- Extraction sized for the pipe rather than for displaced air
- Spout not retracting as the vehicle fills
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