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Gas/liquid nozzle answers mass transfer problems

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A JET aeration nozzle, developed by CSIRO Fluids Engineering Laboratory in Melbourne and licensed commercially to Chemical Plant & Engineering , significantly increases efficiency and throughput in process applications involving gas-to-liquids mass transfer or sparging.

Known as the GL (gas/liquid) Nozzle, the technology - which was developed to increase the rate of dissolution of gases in process circuits - recently successfully completed an in-plant trial conducted over eight months at the Stawell gold mine in Victoria.

The trial aimed to reduce the consumption of oxygen introduced by sparging into a gold recovery circuit comprising a bi-cone and oxygen ring system. This process did not deliver enough oxygen into the high-consuming gold ores, and generated significant maintenance and cleaning costs.

The trial at Stawell confirmed worthwhile savings in oxygen usage, enhanced by limited maintenance requirements. The net saving was calculated as providing a 2.5 month payback.

The GL Nozzle comprises a stainless steel body with ceramic throat lining, with the complete unit fitting into a process circuit by a combination of four bolts.

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