The effect of metal additives on conversion hematite in the processing of bauxite by the Buyer method
S.A. Bibanaeva, V.M. Skachkov
The Institute of Solid State Chemistry of the Ural Branch of RAS
DOI: 10.26456/pcascnn/2021.13.809
Original article
Abstract: The work is devoted to the study of the influence of mono – and composite metal additives on the process of processing bauxite by the hydro-alkaline method. The chemical qualitative and quantitative composition, morphology of red mud (RM) obtained under conditions of autoclave high- temperature leaching were studied. X-ray phase studies aimed at determining the composition and structure of compounds in red mud were carried out. The prospects of the method of autoclave leaching of hard-to-open bauxites with simultaneous extraction of alumina and conversion of hematite to magnetite by hydrogen gas are shown. It was found that the method allows the processing of bauxite with a high degree of alumina extraction and allows to obtain red mud with different magnetic fraction content and low sodium content. The resulting magnetized red mud is suitable for processing by magnetic separation and makes it a promising raw material for the ferrous metallurgy. The dependence of the degree of conversion of hematite to magnetite on the type of reducing agent is determined. According to the results of the research, a patent for the invention was obtained.
Keywords: the bauxite leaching, the recovery of iron, the Bayer process, red mud, hematite, magnetite
- Svetlana A. Bibanaeva – Researcher, Laboratory of Heterogeneous Processes, The Institute of Solid State Chemistry of the Ural Branch of RAS
- Vladimir M. Skachkov – Ph. D., Leading Researcher, Laboratory of Heterogeneous Processes, The Institute of Solid State Chemistry of the Ural Branch of RAS
Reference:
Bibanaeva, S.A. The effect of metal additives on conversion hematite in the processing of bauxite by the Buyer method / S.A. Bibanaeva, V.M. Skachkov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2021. — I. 13. — P. 809-817. DOI: 10.26456/pcascnn/2021.13.809. (In Russian).
Full article (in Russian): download PDF file
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