Crushing

Dust pollution no match for control measures

Donaldson Australasia has released a new cartridge-based range of dust collectors that have been successful in the control of cement dust pollution.

Cement dust is known to cause ill health by skin contact, eye contact or inhalation. Hazardous materials in the dust can include alkaline compounds such as lime (calcium oxide) that are corrosive to human tissue, crystalline silica which is abrasive to skin and can damage lungs, and chromium that can cause allergic reactions. Excess dust can also clog machinery and impact on equipment maintenance costs.
To combat the impact of cement dust, Donaldson has launched a new range of cartridge dust collectors that utilise a filtration technology known as PowerCore.

PowerCore filter cartridges have a nanofibre media technology that performs more efficiently than traditional cellulose-based cartridge filters and bags.

In addition to improved efficiency, PowerCore allows for the creation of CPV (bin vent) collector units which are up to 70 per cent smaller than conventional units. This smaller footprint and unit size means PowerCore units are easier and cheaper to install than conventional bag collectors, and more attractive to operations where space is at a premium. Maintenance is also easier as the PowerCore filter cartridges can be removed and replaced by hand.

Local customers are experiencing the benefits of the PowerCore CPV series collectors. Morgan Cement required a dust filter to vent a finished product bin being fed by two screw conveyors and aerated by air pads for product discharge. The site in Port Kembla, NSW has many dust collectors, all of them traditional baghouses. It installed a CPV-3 unit. After being updated with revised pulse-valve targeting and cradle design in the tubesheet, the unit continuesto perform well with a stable delta-p. Morgan Cement is impressed with PowerCore?s ability to recover from high delta-p situations.

Another of Donaldson?s clients – a cement plant in south-west Sydney – also had a positive experience with its PowerCore CPV-6 collector unit. In this instance, Donaldson had to replace an inefficient dust collector where cement mixes were being loaded from silo storage units into haul trucks. The dust collector was not capable of handling different types of dust in an area where other machinery, including haulage vehicles, needed to be protected from dust pollutants. There was also insufficient space at the plant to house the unit.

Donaldson?s PowerCore CPV-6 unit matched both requirements. The CPV-6 has been operating for 12 months on intermittent duty with a stable and low delta-p below 50 mmwg. The customer commented that the performance was more than adequate for the application and it has loaded numerous cement blends from storage silos into trucks with no complaints from truck drivers about dust problems during the filling operation.

Source: Donaldson Australasia

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