(1. 东北大学 材料与冶金学院，沈阳 110004；
2. 中国铝业河南分公司，郑州 450041)
摘 要:
关键字: 12CaO∙7Al2O3；动力学；溶出；活化能；未反应核模型
（1. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China;
2. Henan Branch of China Aluminum, Zhengzhou 450041, China）
Abstract: Leaching dynamics of 12CaO∙7Al2O3 was studied using shrinking unreacted core model. The effects of stirring intensity, leaching temperature and concentration of reagents were investigated. The results show that the stirring intensity doesn’t influence alumina leaching ratio when it is higher than 600 r/min; the leaching property of 12CaO∙7Al2O3 is better as the temperature and concentration of sodium carbonate are higher. The leaching process is the first order reaction, and it can be described by surface chemical reaction. The frequencys factor is 1.089×10−5, and the apparent activation energy is 27.74 kJ/mol.
Key words: 12CaO∙7Al2O3; dynamics; leaching; apparent activation energy; unreacted core model
