Na_4Ca_3(AlO_2)_(10)的合成和浸出行为  

Synthesis and Leaching Behavior of Na_4Ca_3(AlO_2)_(10)

作　　者：田勇攀 潘晓林[1] 于海燕[1] 涂赣峰[1] 

机构地区：[1]东北大学冶金学院,辽宁沈阳110819

出　　处：《过程工程学报》2016年第2期228-232,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:51174054;51374065)

摘　　要：以分析纯CaCO3,Al2O3和Na2CO3为原料,在1100～1250℃合成了Na4Ca3（AlO2）10,研究了浸出时间、浸出温度、液固比及溶液中碳酸钠和氢氧化钠浓度对Na4Ca3（AlO2）10浸出性能的影响.结果表明,在1200℃烧结30 min,可以合成纯度高于90%的Na4Ca3（AlO2）10.当碳酸钠浓度为80 g/L、氢氧化钠浓度18 g/L时,Na4Ca3（AlO2）10在40℃浸出10 min的氧化铝浸出率达到90%以上.当碳酸钠浓度降为30 g/L时,Na4Ca3（AlO2）10在60℃浸出15 min的氧化铝浸出率大于85%.浸出时添加氢氧化钠有利于氧化铝浸出率的提高,氢氧化钠浓度大于5 g/L时,氧化铝浸出率可提高10%以上.Na4Ca3（AlO2）10的浸出性能优于12CaO·Al2O3和CaO·Al2O3.Na4Ca3（AlO2）10 was synthesized at 1100～1250 ℃ with analytically pure reagents of Ca CO3, Al2O3 and Na2CO3. The effects of leaching time, leaching temperature, liquid-to-solid ratio and concentrations of sodium carbonate and sodium hydroxide in solution on the leaching rate of Na4Ca3（AlO2）10 were examined. The results show that the purity of Na4Ca3（AlO2）10 roasted at 1200 ℃ for 30 min is over 90%. The alumina leaching rate can reach over 90% after its leaching at 40 ℃ for 10 min, when the concentrations of sodium carbonate and sodium hydroxide are 80 g/L and 18 g/L, respectively. The leaching rate can be more than 85% after its leaching at 60 ℃for 15 min, when the concentration of sodium carbonate decreases to 30 g/L. Sodium hydroxide in the solution benefits the leaching process of Na4Ca3（AlO2）10. The leaching rate can be improved more than 10% when the concentration of sodium hydroxide is higher than 5 g/L. Na4Ca3（AlO2）10 has better leaching efficiency than 12 CaO·Al2O3 and CaO·Al2O3.

关 键 词：Na4Ca3(AlO2)10 石灰烧结法 浸出 氢氧化钠 碳酸钠 铝酸钙 

分 类 号：O482.31[理学—固体物理]