|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Alumina & Bauxite
||Thermodynamic Behavior of Lime Desulfurization in Sodium Aluminate Solution
||Wu Xianxi, Zhu Weidong, Jiang Hongshi, Wu Song
|On-Site Speaker (Planned)
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.
||Planned: Light Metals