Within the aluminium casthouse industry there is a need for an efficient, low hold up volume, filtration process capable of treating high flow metal rates.

Optifilter is a three chamber system with a ceramic foam filter as the first stage, TiBAl grain refiner added in the second stage and filtration completed in the third stage by using an efficient cyclone.

The Optifilter system incorporating a cyclone, has been proven in terms of effectiveness by numerical and water modelling experiments and a prototype unit has been used in casthouse trials where it drastically reduced the number inclusions, in the melt.

If eventually proven to match modeling predictions, it will provide a high efficiency filtration solution for frequent alloy changes or low volume operations.

Computer simulation shows the flow of metal through the

cyclone carrying inclusions in the metal stream.

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