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 | | Quarrying
When silica, limestone, cement, aggregate and other respirable dust particles ranging in diameter from 0.1 to roughly 70 microns are airborne, they become an occupational nuisance. As a source of physical discomfort, lost materials and wear on conveying pulleys, idlers, belting and motors - such dust is a significant factor in lowered productivity and added operating costs.
Recent successful developments in the industr's campaign to control fugitive dust particulates is low cost dry fog dust suppression using the sonicom™ Ultrasonic Fogging Nozzle System.
The system agglomerates dust at the source through it’s micro fine spray of thousands of tiny water droplets and can be installed at breakers, crushers and other origin as well as transfer points, outloaders, screens, etc.
The dry fog dust suppression system controls respirable particulates down to the 0.1 to 3 microns fines which are considered to be the principal source of dust clouds, haze and accompanying low levels of visibility. In most applications where respirable dust particles can be settled out of the atmosphere quickly, the sonicom™ systems makes it unnecessary to add a tension additive product to the water.
Total water consumption is extremely low - only 0.1% of production at each point of concern ensuring that conveyor belt wetting and other accompanying tracking problems are avoided. Control of water output is achieved by simple pressure control. The volume of water can be modified in relation to the humidity content of the pulverized silica.
The sonicom™ system also provides these benefits:
- Less product wetting than conventional water spray systems (less than 0.5%)
- Micron size water droplets multiply surface area while decreasing total water needed
- Costly wetting agents and their controls eliminated
- No conveyor belt wetting or accompanying tracking problems
- Less conveyor downtime and fewer conveyor belt replacement parts
- Agglomeration of dust helps improve performance of precipitators, baghouses and collectors
- Nozzles operate on low pressure air and water to eliminate need for expensive pumping systems
- Improved working conditions enables compliance with applicable health and safety regulations
- Cleaning and maintenance costs reduced
- Permits recovery of spilled materials
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