The Influence of the Mineral Composition of Low-Grade Aluminum Ores on Aluminium Extraction by Acid Leaching

Suss, A. G.; Damaskin, A. A.; Senyuta, Alexander; Panov, А. V.; Смирнов, А. А.

doi:10.1007/978-3-319-48144-9_18

Cited by 7 publications

(7 citation statements)

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“…Despite substantial prior research, the industrial production of alumina from non-bauxite ores is implemented only in a few countries of the former USSR, 22 but none of these methods is currently used for potassium extraction. Earlier reviews 23,24 are focussed on the technical developments related to the transformation of K-bearing silicates into various products from 1856 to 1995.…”

Section: Antoine Allanorementioning

confidence: 99%

Aqueous alteration of potassium-bearing aluminosilicate minerals: from mechanism to processing

Skorina

Allanore

2015

Green Chem.

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Section: Antoine Allanorementioning

confidence: 99%

Aqueous alteration of potassium-bearing aluminosilicate minerals: from mechanism to processing

Skorina

Allanore

2015

Green Chem.

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“…A chemical analysis of the prepared γ-Al2O3 was carried out to compare this composition with the requirements for metallurgical alumina. Table 6 lists its chemical composition, specific surface area (Figure A3a) and the requirements according to [58]. It can be observed that after the decomposition of the precursor, the aggregates of the formed γ-Al 2 O 3 powder presented in the SEM image (Figure 9a) are small particles of flocculent form and have a uniform distribution of aluminum and oxygen.…”

Section: Alumina Precipitationmentioning

confidence: 99%

Recovery of Scandium, Aluminum, Titanium, and Silicon from Iron-Depleted Bauxite Residue into Valuable Products: A Case Study

et al. 2022

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Bauxite residue is a high-iron waste of the alumina industry with significant contents of scandium, aluminum, and titanium. This study focuses on the recovery of Sc, Al, Ti, and Si from iron-depleted bauxite residue (IDBR) into valuable products. Iron depletion was carried out using reduction roasting followed by low-intensity magnetic separation to enrich bauxite residue in Al, Ti, and Sc and reduce an adverse effect of iron on scandium extraction. Hydrochloric high-pressure acid leaching, aluminum precipitation by saturation of the acid leachate, solvent extraction of scandium using di(2-ethylhexyl) phosphoric acid (HDEHP) and tributyl phosphate (TBP), alkaline leaching of the acid residue with subsequent silica precipitation were used to obtain appropriate selective concentrates. As a result, scandium concentrate of 94% Sc2O3, crude alumina of 93% Al2O3, titanium concentrate of 41.5% TiO2, and white carbon of 77% SiO2 were prepared and characterized. Based on the characterization of the treatment stages and the obtained valuable products, the prospect for the application of the suggested flowsheet was discussed.

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“…By now, a significant number of methods for processing kaolins and kaolinite clays are known and continue to be improved, among which acid technologies are historically significant. Their disadvantages are the formation of hard-to-filter finely dispersed sediments and the use of expensive acid-resistant materials and equipment [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Research and development of a comprehensive technology for processing kaolinite clays in Kazakhstan

Dyussenova¹,

PhD²,

El‐Amir³

et al. 2021

Challenges of Science

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In the Republic of Kazakhstan, the most promising are kaolinite clays of the Alekseevsky deposit. For effective processing of clays, it is necessary to develop special methods of processing, since satisfactory results were not achieved when using standard methods of gravity processing. The article provides the results of studies of the effect of preliminary chemical activation on the yield of the kaolinite fraction during gravitational processing. Previously, the method of preliminary chemical activation of raw materials in a solution of sodium bicarbonate has proven itself well in the processing of various mineral raw materials. It is determined that as a result of preliminary chemical activation, changes in the phase composition occurred. The dependence of the yield of the kaolinite fraction on the temperature of chemical activation, duration, and the ratio of W:T and the concentration of the sodium bicarbonate solution. Based on the results obtained, a technology for the complex processing of kaolinite clays has been developed, which provides for the preliminary chemical activation of the feedstock at the beginning of the process, which will effectively isolate high-quality kaolinite and quartz products, which will significantly reduce the flow of materials entering for sintering. As a result of activation, the phase composition of the kaolinite fraction has changed: the percentage of the kaolinite fraction has decreased; new phases of muscovite and sodium aluminosilicate appeared; the amount of quartz increased.

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The Influence of the Mineral Composition of Low-Grade Aluminum Ores on Aluminium Extraction by Acid Leaching

Cited by 7 publications

References 1 publication

Aqueous alteration of potassium-bearing aluminosilicate minerals: from mechanism to processing

Aqueous alteration of potassium-bearing aluminosilicate minerals: from mechanism to processing

Recovery of Scandium, Aluminum, Titanium, and Silicon from Iron-Depleted Bauxite Residue into Valuable Products: A Case Study

Research and development of a comprehensive technology for processing kaolinite clays in Kazakhstan

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