Research of activating additives influence on ferrous hydrogarnet synthesis
About authors
- 1 — «Aluminium of Kazakhstan» JSC
- 2 — «Aluminium of Kazakhstan» JSC
- 3 — Research & Discovery Centre of «Aluminium of Kazakhstan» JSC
- 4 — 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.
References
- Гидрогранатовая технология переработки бокситового сырья как современная альтернатива способу Байер – спекание / В.В.Медведев С.Н.Ахмедов, В.М.Сизяков, В.П.Ланкин, А.И.Киселев // Цветные металлы. 2003. № 11.С.58-62.
- Сажин В.С. Новые гидрохимические способы комплексной переработки алюмосиликатов и высоко-кремнистых бокситов. М., 1988. 216 с.
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