Selecting And Improvement Of A Method For Processing Kaolinite Fraction Of Bauxite
Vladilenovich G.S. Berikkalikyzy D.S. Igorevna B.A. Anvarbekovich A.R. Iliyaevna M.A.
2024National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2024#2024Issue 435 - 57 pp.
The methods of separate processing of fine kaolinite fractions of gibbsitekaolinite bauxites have been studied, including: preliminary thermochemical transformation, combined processing by Bayer hydrochemistry and hydrochemical processing with preliminary chemical activation. The preliminary thermal transformation was carried out by pre-firing. When using recycled aluminate solutions of the Bayer branch for leaching, solutions suitable for the extraction of Al(OH)3 by decomposition were obtained. The extraction of Al2O3 into the leaching solution was 70 %. For the hydrochemical processing of leaching sludge in the Bayer branch, a method for obtaining the active form of a calcium additive has been developed. The extraction of Al(OH)3 in the Bayer branch was obtained by 38.0 % and by 87.2 % in the branch of hydrochemical sludge processing. The total recovery was 92.06 %. As a result of preliminary chemical activation in a solution of sodium bicarbonate, a complete transformation of the phase composition occurred: the phases of gibbsite, kaolinite, quartz disappeared and the phases of sodalite, dawsonite and boehmite were formed. After hydrochemical leaching in a high-modulus solution with the addition of an active calcium additive, a dump sludge and a medium-modulus solution were obtained, while the extraction of Al2O3 into the solution was 89.5 %. According to the research results, the choice of technology for processing fine fractions by various hydrochemical methods depends on the specific production conditions – the availability of existing equipment and the amount of modernization.
calcium additive , chemical activation , dawsonite , decomposition , fraction , gibbsite – kaolinite bauxite , hydrochemistry , kaolinite , leaching , processing , sludge , thermochemical transformation
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Satbayev University, JSC Institute of Metallurgy and Ore Benefication, Almaty, Kazakhstan
Laboratory of Alumina and Aluminum, Satbayev University, JSC «Institute of Metallurgy and Enrichment», Almaty, Kazakhstan
Kazphosphate LLP, Almaty, Kazakhstan
Polyfloks LLP, Almaty, Kazakhstan
Satbayev University, JSC Institute of Metallurgy and Ore Benefication, Almaty, Kazakhstan
Satbayev University, JSC Institute of Metallurgy and Ore Benefication, Almaty, Kazakhstan
Satbayev University
Laboratory of Alumina and Aluminum
Kazphosphate LLP
Polyfloks LLP
Satbayev University
Satbayev University
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