The Problem:

A producer of kiln-dried silica sand was experiencing a problem with very high dust levels at a railway head where sand was being loaded onto railway trucks.

The sand is loaded into the trucks at high speed and in large volumes. Being dried, the silica dust quickly becomes airborne as it is loaded and the air in the loading bay would be so thick with silica dust that it was sometimes impossible to see from one side of the loading bay to the other.

Health and safety legislation on dust is becoming stricter than ever as the hazards to health from breathable dust, and silica dust in particular are more widely understood.

This sand supplier had to find a way of clearing the atmosphere in the loading area.

The Solution:

MicronFog™ nozzles were fitted to bottom chords in the loading bay roof area over the railway wagons and the fogging was timed to start just before the loading chute opened and the loading process began:

The fogging nozzles selected had to be very small, to ensure the fog was fine enough to prevent wetting the dried sand whilst allowing the dust particles to attach to the tiny droplets and fall into the wagon or to the loading bay floor.

Dried sand generates airborne dust

System Pump: MicronFog™ Multi Zone

Number of Nozzles: 44

Approximate Length of tubing: 60M

The Result:

As the video nicely demonstrates, the airborne dust is minimal. This railway loading head has been inspected and airborne levels of dust have been deemed well below the allowable limits set by HSE. The operations manager is delighted that not only is the dust controlled, but more sand gets into the wagons being loaded.

 Click on one of these links for more about Process Dust Suppression or Loading point Dust Suppression.