The innovative solution was designed following community pressure to fix dust problems in the inner-Brisbane suburb of Mt Cooth-tha.
Brisbane City Works officials contracted Donaldson–Torit DCE to engineer and progressively implement the engineering solution in the Mt Cooth-tha quarry.
The company’s Queensland consultant designed a system based around the company’s 2-5-15 Cased Dalamatic reverse pulse dust collector, said to be capable of collecting dust at a rate of 19,500 m3 per hour.
Dust collection equipment at Mt Coot-tha has been particularly significant in double screening areas that are exposed to wind pressure.
Donaldson Australia purpose fitted a 3-6-15 Cased Dalamatic reverse pulse dust collector capable of collecting 34,000 m3 per hour of dust in Stage Two of the project.
The quarry blasts adjacent rock which is fed into a primary crusher/screener at a rate of 3,000 tonnes per day (250 mm product), which moves onto a secondary screening (to 50 mm) at 2,500 tonnes per day.
The next stage at the quarry is a tertiary process (1,700 tonnes per day) and by this stage there is about 55% dust portion as the system is producing 18 mm, 10 mm and 7 mm fines as well as dust.