(中南大学 化学化工学院， 长沙 410083)
摘 要: 通过对某氧化铝厂种分车间实际生产数据的采集和处理，由铝酸钠溶液种分过程反应速率方程得到了种分过程55.5℃和60℃的Rpeq分别为0.593和0.624，并由Rp随时间变化的方程计算了不同温度制度下Rp及(Rp-Rpeq)随时间变化的关系，讨论了生产过程中温度控制的基本原则，提出适当的中间降温是提高种分过程反应速率及保证良好产品质量的有力措施。
关键字: 铝酸钠溶液； 种分过程； 降温制度
of alumina refinery and relation of Rpeq
with temperature-drop program
（College of Chemistry and Chemical Engineering,
Central South University, Changsha 410083, P.R.China）
Abstract:The important parameter Rpeq was estimated to be 0.593 and 0.624 at 55.5℃ and 60℃ during the practical Bayer precipitation process from the kinetic equation of sodium aluminate precipitation. The relation of Rp and (Rp-Rpeq ) with time on different temperature-drop program was determined with the data available from the equation of variation of Rp via time. By the analysis of that, it was concluded that a proper temperaturedrop program is the guarantee of quick precipitation of the product and high quality of the product.
Key words: aluminate liquor; precipitation process; temperature decreasing program
