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中文摘要：
根据CaO·2Al2O3合成热力学计算结果及XRD分析结果，研究了以碳酸钠和氢氧化钠的混合溶液从CaO·2Al2O3中浸出氧化铝。结果表明：CaO·2Al2O3的合成在热力学上可行，合成物以CaO·2Al2O3物相为主；在液固体积质量比5：1、浸出时间75min、碳酸钠质量浓度100g／L、氢氧化钠质量浓度30g／L、浸出温度90℃条件下，氧化铝浸出率可达91．12％。
英文摘要：
Based on thermodynamics calculate and XRD analysis of CaO·2Al2O3, leaching of alumina from the compound with a mixture solution of sodium carbonate and sodium hydroxide was studied. The results showed that the main phase in the synthetic compound was CaO·2Al2O3. The leaching of alumina reached 91.12% under the conditions of temperature of 90℃ ,leaching time of 75 min, ratio of liquid to solid of 5 ： 1, sodium carbonate concentration of 100 g/L,sodium hydroxide concentration of 30 g/L.
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