Abstract
In this paper the treatment of red mud by autoclave leaching for its conversion into ferrous hydrogarnet product and extraction of valuable components (i.e. Na2O, Al2O3, Ga and V2O5) was investigated. Leaching of red mud using high modulus alkaline solution (Na2O 240g/L; αк=30) in the presence of lime at 240–260°C was found to allow the recovery of the contained values (98.5% Na2O, 65.3% AI2O3, 55.5% Ga and 65.8% V2O5) and the fixing silica in the form of hydrogarnet mud (3СаО·Fe2O3·2SiO2·2Н2О) with a low alkali content (0.35% Na2O). An effective treatment scheme for the leach solution based on precipitation and two-stage carbonization processes was developed and demonstrated. This allowed the generation of alkaline solutions suitable for recycling back to leaching stage and recovery of a concentrate (30% AI2O3) that is rich in Ga (0.32%) and V2O5 (3.7%). The chemical and phase composition of the solid products obtained from each stage of processing were determined by XRF and XRD analyses. This study has demonstrated that Bayer–hydrogarnet process can be suitably exploited for processing of red mud.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
