Noack, S. Torsiello, S. Scarsella, A. Sparks, T.
In the Bayer process, security filtration plays a key role in the production of high quality hydrate, particularly in terms of impurity control . As part of a de-bottlenecking project at Rio Tinto Yarwun alumina refinery, the vertical pressure filters were successfully upgraded to the 15% target throughput improvement. Key modifications include the re-design of the cartridges to increase the filtration area, while decreasing the weight of the filters frames. The present paper outlines the main challenges and describes the methods applied for the engineering and the implementation of the project.