Flow sheet optimization by the concept of sustainable development: alumina industry

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2010

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Kurucak, Abdurrahman

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In this study, effects of changes in various parameters of the Bayer process on the amount of “red mud”, which has many environmental drawbacks, were examined in accordance with the principles of “sustainable development”. The production process of Seydişehir Aluminum Plant is modeled as a case study. First a steady-state mass balance calculation is carried out by incorporating sequential modular approach. Then a model of the Bayer process digester is programmed and several simulations are carried out using this model. Results of the mass balance calculation revealed that changes in the extent of the digestion reaction, which is a function of temperature and caustic concentration, and washing efficiency may have a 2.07% decrease on the amount of red mud produced,which implies nearly 10,000 tons of decline per annum, while amount of hydrate produced is increased by 4.52%. A 7.40 % decrease on the amount of red mud produced on dry basis per kg of hydrate was found to be achievable. Optimum operating temperature for the digester was calculated as 277.3 °C.

Subject Keywords

Chemical engineering.

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http://etd.lib.metu.edu.tr/upload/12611680/index.pdf
https://hdl.handle.net/11511/19337

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Kurucak, “Flow sheet optimization by the concept of sustainable development: alumina industry,” M.S. - Master of Science, Middle East Technical University, 2010.