Evaluation of Main Factors for Improvement of the Scandium Leaching Process from Russian Bauxite Residue (Red Mud) in Carbonate Media
А. V. Boyarintsev, Htet Ye Aung, С. И. Степанов, Andrei Shoustikov, П. И. Иванов, V. G. Giganov
Abstract
) carbonation conditions in the pH range of 9.5-10.0 allows reducing the scandium leaching time by two times and reaching 40-45% scandium extraction. Leaching of RM in carbonate/bicarbonate media is accompanied by secondary processes (adsorption, hydrolysis, and coprecipitation) leading to a decrease in scandium extraction. The obtained results allow improving understanding of scandium chemical behavior in complex aqueous carbonate/bicarbonate systems and can be used for the optimization of the alternative carbonate process for scandium extraction from RM.
Topics & Concepts
ScandiumBauxiteLeaching (pedology)Red mudCarbonateCarbonationChemistryBicarbonateInorganic chemistryBayer processNuclear chemistryMaterials scienceEnvironmental chemistryMetallurgyGeologySoil scienceOrganic chemistrySoil waterBauxite Residue and UtilizationRecycling and utilization of industrial and municipal waste in materials productionExtraction and Separation Processes