Impurities build up and behavior of low organic bauxite of Panchpatmali bauxite mines of Nalco in the Bayer process
- National Aluminum Co. Ltd., Bhubaneswar, Orissa (India)
The major portions of the impurity enter the Bayer process through bauxite. Beyond the critical levels the impurities alter the kinetics of the process. Among the various impurities, organic carbon is the most prominent one that affects the precipitation operation and the product quality, depending on the level of organic with respect to the precipitation process adopted. A lower level of less than 0.2% organic carbon in the Panchpatmali bauxite of Nalco although has allowed smooth operation of the plant for the last seven years, the same has been a matter of concern today. The present paper has analyzed the situation at Nalco plant with respect to various impurities build up over the years. The occurrence of organic in bauxite and its behavior in the Bayer process has been analyzed. Even such low level organic has been a point of watch for achieving productivity and quality product. The paper also highlights how the problems of sodium oxalate, emerging from the organic, has been resolved at Nalco with help of Aluminum Pechiney, France. Results are supported with experiments, plant data and characterization of bauxite and hydrates through instrumental techniques.
- OSTI ID:
- 371926
- Report Number(s):
- CONF-960202-; ISBN 0-87339-312-0; TRN: IM9641%%3
- Resource Relation:
- Conference: Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Anaheim, CA (United States), 4-8 Feb 1996; Other Information: PBD: 1996; Related Information: Is Part Of Light metals 1996; Hale, W. [ed.] [Anglesey Aluminum Metal Ltd., North Wales (United Kingdom)]; PB: 1304 p.
- Country of Publication:
- United States
- Language:
- English
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