© 2015 Micro Motion, Inc. All rights reserved. The Emerson logo is a trademark and service mark of Emerson Electric Co. Micro Motion, ELITE, ProLink, MVD and MVD Direct Connect marks are marks of one of the Emerson Process Management family of companies. All other marks are property of their respective owners. Application Alumina (aluminum oxide) is a white granular material refined from bauxite ore using what is called the Bayer process. The ore is ground and mixed with lime and caustic soda, and this slurry is heated in a high-pressure digester. The aluminum oxide is then dissolved by the caustic soda, separated, and precipitated out of solution. It is then washed and heated to drive off the excess water, leaving the white alumina powder. Challenge The mix of bauxite and c

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