Research of activating additives influence on ferrous hydrogarnet synthesis
About authors
- 1 — first Vice-President of «Aluminium of Kazakhstan» JSC «Aluminium of Kazakhstan» JSC
- 2 — president of «Aluminium of Kazakhstan» JSC «Aluminium of Kazakhstan» JSC
- 3 — deputy head Research & Discovery Centre of «Aluminium of Kazakhstan» JSC
- 4 — Ph.D. chief engineer Alumina production, «ALCORUS» Co Ltd
Abstract
We have studied the influence of activating ferrous additives on alumina and alkali recovery during the process of red mud lixiviation in autoclaves with the use of high-modulus alkalialuminate solutions and in the presence of lime. The effectiveness of usage of additives, containing sodium and calcium ferrites, during hydrochemical processing of red muds of Bayer process according to hydrogarnet technology, has been shown: increase in alumina recovery by 5-8 %, the possibility to conduct the process at average temperatures 240-260 °С and reduced concentrations of caustic alkali up to 200 g/dm3.
Область исследования:
(Archived) Metallurgy, physical and chemical regularities of technological processes
Keywords:
red mud
hydrogarnet technology
activating ferrous additives
clinker
sodium ferrites
calcium ferrites
iron sands
References
- Hydrogranate technology of bauxites processing as an alternative to Bayer-sintering technology / V.V.Medvedev, S.N.Ahmedov, V.M.Sizyakov, V.P.Lankin, A.I.Kiselev // Nonferrous metals. 2003. № 11. P.58-62.
- Sazhin V.S. New hydrochemical methods of complex processing of aluminium silicates and high-silicon bauxites. Мoscow, 1988. 216 p
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