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Rotary Lobe Pumps ensure water recycling in mine

A manufacturer of mobile water treatment systems was in urgent need of high flow flocculant transfer pumps to enable water to be recycled and reused within a mine.

The mine was currently utilising water from a local reservoir, but with storage levels falling below 5%, fresh water supply to a nearby town was at risk of being halted.

North Ridge worked with a manufacturer of a Dissolved Air Flotation (DAF) System to utilise contaminated borehole water with high salinity, within the mine for operational and maintenance services. To achieve this a flocculant was dosed into contaminated water, combining suspended solids within the water, with secondary filtration used to collect and remove unwanted particles.

The rotary lobe pumps were positioned between the DAF System and the secondary filter, working at a flowrate up to 80m³/hour ensuring mining operation demand was met and processes unaffected.

Rotary lobe pumps are positive displacement units meaning they will continue to transfer fluid at the required flowrate, despite changes in back pressure which can be experienced as filters become clogged.

The operating speed of the units was a very low 428rpm, meaning the units would operate for long periods of time without maintenance, and with low amounts of wear. Furthermore the gentle operating motion ensures that the transportation of flocculant – which is shear sensitive, is performed without damage, or compromise to process.

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