Influence of lime (CaO) on low temperature leaching of some types of bauxite from Guinea
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Marie Constance Béavogui
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Irina Viktorovna Loginova
Abstract
In Bayer process, low temperature treatment of bauxite generally applicable to gibbsite in the presence of a significant amount of boehmite (>3%), requires a temperature increase and the addition of an additive to improve the leaching conditions. This research is based on improvement of low temperature leaching conditions 108 °C and the addition of lime during the attack of some types of bauxite in Guinea. TRUhat is Low Mono Grade Bauxite (LMG), Standard Metal Grade (SMG) and Fria Bauxite (BF). The results of this study confirm an improvement in the extraction yields. Additionally, it shows an increase in yields of two points when the lime dosage is low, and between 0.5 and 3% of the bauxite weight. Based on the mineralogical and chemical composition findings, minerals contain of SMG bauxites are difficult to decompose while BF bauxites are easy to process. Sougueta limestone was used for testing. After calcination, we obtained CaO added at a rate of: 0.3; 0.5; 1; 3 and 6% of the bauxite weight to finally obtain the highest leaching efficiency compared to the leaching efficiency of bauxite without addition. The best leaching rate obtained for LMG, SMG and BF are respectively: 89.01, 87.15 and 89.74% for additions of 1, 0.5 and 3% CaO respectively.
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Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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© 2021 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Reviews
- Influence of lime (CaO) on low temperature leaching of some types of bauxite from Guinea
- Ethnobotanical survey, phytoconstituents and antibacterial investigation of Rapanea melanophloeos (L.) Mez. bark, fruit and leaf extracts
- Catalytic properties of supramolecular polymetallated porphyrins
- Lignin-based polymers
- Bio-based polyhydroxyalkanoates blends and composites
- Biodegradable poly(butylene adipate-co-terephthalate) (PBAT)
- Repurposing tires – alternate energy source?
- Theoretical investigation of the stability, reactivity, and the interaction of methyl-substituted peridinium-based ionic liquids
- Polymeric membranes for biomedical applications
- Design of locally sourced activated charcoal filter from maize cob for wastewater decontamination: an approach to fight waste with waste
- Synthesis of biologically active heterocyclic compounds from allenic and acetylenic nitriles and related compounds
- Magnetic measurement methods to probe nanoparticle–matrix interactions
- Health and exposure risk assessment of heavy metals in rainwater samples from selected locations in Rivers State, Nigeria
- Evaluation of raw, treated and effluent water quality from selected water treatment plants: a case study of Lagos Water Corporation
- A chemoinformatic analysis of atoms, scaffolds and functional groups in natural products
- Hemicyanine dyes
- Thermodynamics of the micellization of quaternary based cationic surfactants in triethanolamine-water media: a conductometry study
- Compounds isolated from hexane fraction of Alternanthera brasiliensis show synergistic activity against methicillin resistant Staphylococcus aureus
- Internal structures and mechanical properties of magnetic gels and suspensions
- SPIONs and magnetic hybrid materials: Synthesis, toxicology and biomedical applications
- Magnetic field controlled behavior of magnetic gels studied using particle-based simulations
- The microstructure of magnetorheological materials characterized by means of computed X-ray microtomography
- Core-modified porphyrins: novel building blocks in chemistry
- Anticancer potential of indole derivatives: an update
- Novel drug design and bioinformatics: an introduction
- Multi-objective optimization of CCUS supply chains for European countries with higher carbon dioxide emissions
- Exergy analysis of an atmospheric residue desulphurization hydrotreating process for a crude oil refinery
- Development in nanomembrane-based filtration of emerging contaminants
- Supply chain optimization framework for CO2 capture, utilization, and storage in Germany
- Naturally occurring heterocyclic anticancer compounds
- Part-II- in silico drug design: application and success
- Advances in biopolymer composites and biomaterials for the removal of emerging contaminants
- Nanobiocatalysts and photocatalyst in dye degradation
- 3D tumor model – a platform for anticancer drug development
- Hydrogen production via water splitting over graphitic carbon nitride (g-C3N4 )-based photocatalysis
Articles in the same Issue
- Frontmatter
- Reviews
- Influence of lime (CaO) on low temperature leaching of some types of bauxite from Guinea
- Ethnobotanical survey, phytoconstituents and antibacterial investigation of Rapanea melanophloeos (L.) Mez. bark, fruit and leaf extracts
- Catalytic properties of supramolecular polymetallated porphyrins
- Lignin-based polymers
- Bio-based polyhydroxyalkanoates blends and composites
- Biodegradable poly(butylene adipate-co-terephthalate) (PBAT)
- Repurposing tires – alternate energy source?
- Theoretical investigation of the stability, reactivity, and the interaction of methyl-substituted peridinium-based ionic liquids
- Polymeric membranes for biomedical applications
- Design of locally sourced activated charcoal filter from maize cob for wastewater decontamination: an approach to fight waste with waste
- Synthesis of biologically active heterocyclic compounds from allenic and acetylenic nitriles and related compounds
- Magnetic measurement methods to probe nanoparticle–matrix interactions
- Health and exposure risk assessment of heavy metals in rainwater samples from selected locations in Rivers State, Nigeria
- Evaluation of raw, treated and effluent water quality from selected water treatment plants: a case study of Lagos Water Corporation
- A chemoinformatic analysis of atoms, scaffolds and functional groups in natural products
- Hemicyanine dyes
- Thermodynamics of the micellization of quaternary based cationic surfactants in triethanolamine-water media: a conductometry study
- Compounds isolated from hexane fraction of Alternanthera brasiliensis show synergistic activity against methicillin resistant Staphylococcus aureus
- Internal structures and mechanical properties of magnetic gels and suspensions
- SPIONs and magnetic hybrid materials: Synthesis, toxicology and biomedical applications
- Magnetic field controlled behavior of magnetic gels studied using particle-based simulations
- The microstructure of magnetorheological materials characterized by means of computed X-ray microtomography
- Core-modified porphyrins: novel building blocks in chemistry
- Anticancer potential of indole derivatives: an update
- Novel drug design and bioinformatics: an introduction
- Multi-objective optimization of CCUS supply chains for European countries with higher carbon dioxide emissions
- Exergy analysis of an atmospheric residue desulphurization hydrotreating process for a crude oil refinery
- Development in nanomembrane-based filtration of emerging contaminants
- Supply chain optimization framework for CO2 capture, utilization, and storage in Germany
- Naturally occurring heterocyclic anticancer compounds
- Part-II- in silico drug design: application and success
- Advances in biopolymer composites and biomaterials for the removal of emerging contaminants
- Nanobiocatalysts and photocatalyst in dye degradation
- 3D tumor model – a platform for anticancer drug development
- Hydrogen production via water splitting over graphitic carbon nitride (g-C3N4 )-based photocatalysis
