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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Alumina & Bauxite
Presentation Title Thermodynamic Behavior of Lime Desulfurization in Sodium Aluminate Solution
Author(s) Wu Xianxi, Zhu Weidong, Jiang Hongshi, Wu Song
On-Site Speaker (Planned) Wu Xianxi
Abstract Scope The method of GoR,Ca4Al2SO10·12H2O=∑Gooxide+∑GoR was used to estimate the Gibbs free energy of calcium hydroaluminosulfate (3CaO·Al2O3·3CaSO4·nH2O, 3CaO·Al2O3·CaSO4·12H2O) and Ca3Al2(OH)12, then to calculate the Gibbs free energies of desulfurization reaction that lime interacts with sodium sulfate in sodium aluminate solution. To make judgments about reaction direction, the correctness of calculation was validated by experiments. Thermodynamic calculation and XRD phase identification indicate that 3CaO·Al2O3·3CaSO4·nH2O and 3CaO·Al2O3·CaSO4·12H2O can be generated in the procces of desulfurization. With the reaction time to extend the calcium hydroaluminosulfate decomposition, the 3CaO·Al2O3·3CaSO4· nH2O has been characterized. The thermodynamic behavior of adding lime to desulfurization in the sodium aluminate solution was discussed.
Proceedings Inclusion? Planned: Light Metals


A Novel Process of Alumina Production from Low-grade Bauxite Containing Sulfur
Application of Tricalcium Aluminate Instead of Lime for the Recovery of Aluminum in Middle-low Grade Bauxite in Calcification-Carbonization Process
CFB Alumina Calciners - New and Future Generation Opportunities for Green Field Refineries
Characterization and Ore Dressing of Bauxite from Brazil
Characterization of Activated Alumina Production via Spray Pyrolysis
Chemical Alumina Preparation by Using High Alumina Content Fly Ash
Evolutional Development of Alkaline Aluminosilicates Processing Technology
I-1: A Study on Optimization of Processing Parameters for Synthesis of Calcium Hydroaluminosulfate Using Response Surface Methodology
Iron Separation from Bauxite through Smelting-reduction Process
Leaching Behavior of Alumina from Smelting Reduction Calcium Aluminate Slag with Sodium Carbonate Solution
Low Temperature Reduction of Hematite in Red-Mud to Magnetite
New Process Research on Aluminium Production from Non-traditional Aluminum Resource by Microwave Chlorination
Process Optimization for Diaspore Digestion Equilibrium Using Response Surface Methodology
Processing Diasporic Red Mud by the Calcification-carbonation Method
Recovery of Iron-, Titanium-bearing Constituents from Bauxite Ore Residue via Magnetic Separation Followed by Sulfuric Acid Leaching
Research of Flocculants and Dewatering Additives for Filtration of Red Mud
Security Disposal and Comprehensive Utilization of Bauxite Residues
Thermodynamic Analysis and Formation Law of Q Phase of Calcium Aluminate Clinker
Thermodynamic Behavior of Lime Desulfurization in Sodium Aluminate Solution

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