Abstract
The paper is devoted to the developed technology of treatment of red mud, a dangerous waste formed in the process of production of aluminum from bauxite ores by the Bayer process. The technology was examined on the samples of red mud from Russia and Iran aluminum plants. Detailed description of the process is presented. The chemical analysis data before and after the treatment are presented. It is shown that the new technology based on the use of electro-membrane apparatuses makes possible to neutralize the hazardous red mud with separate production of valuable compounds including rare earth metals. Several schemes of the process are presented.
Highlights
Extraction of minor valuable or toxic elements from the industrial waste is an important task
In the previous paper it is described the basis of electromembrane technology for red mud processing with extraction of valuable elements [8]
The samples of Bayer red mud were taken from an alumina refining plant in Ural (Russia) and Iran
Summary
Extraction of minor valuable or toxic elements from the industrial waste is an important task. In the previous paper it is described the basis of electromembrane technology for red mud processing with extraction of valuable elements [8]. It is presented more detailed description of the process including the schemes. The Australian researchers from CSIRO’s Mineral Resources Flagship have used the electrodialysis process for treatment of red mud [9] They leached it by sulfuric acid and in the end of the process they spitted the resulting Na2SO4 on NaOH and H2SO4 which has been delivered to the process beginning. The process described in this paper is based on completely other approach
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