The dust source must be contained or sealed to isolate the dust and fog from outside influences. This alone will reduce dust emissions significantly. This principal is responsible for the presence of enclosures at transfer points, the use of stilling sheds, walls or windfences around the dump pockets, enclosures over screens and bins, double lip skirts, sealed chutes, etc.
A key element for a successful dust control system is the design of the transfer chutes and the quality and quantity of the hats located at the loading zone. A good design will reduce the potential energy, make the belts last longer and center the load on the conveyor, reducing monitoring problems. All these will also minimize the dust generation. Without an adequate support for the conveyor, tight skirts (we recommend to use the double lip ones) and enough control volume there will be always dust leaks. An integral design will need to consider engineered chutes considering impact beds, skirts and a dust control system (fog or extraction).