ALUMINA PRODUCTION FOR MODERN SMELTING TECHNOLOGIES BY HIGH SOLID CONTENT PRECIPITATION
Cristol, B. and Mordini, J
After a comparison of the so called American and European precipitation processes, a discussion of the mechanisms involved is presented.
The paper explains the difficulties in controlling grain size distribution with very high seed charges, around 1,000 g hydrate per liter of aluminate liquor. A specific process control has been developed and corresponding industrial results are given.
Application in smelters shows the correct adaptation of the resulting alumina quality to the most recent smelting technologies.