(中南大学 化学化工学院, 长沙 410083)
摘 要: 针对砂状氧化铝生产实践,基于热力学与动力学原理以及生产过程稳态运行等假设,推导出了砂状氧化铝生产过程首槽温度控制预测的准理论模型,采用生产现场数据,包括粒度分布值φ(rc)、温度(T )、苛性比(Rp)、苛性钠浓度(c(NaOH))、铝酸钠浓度(c(NaAl(OH)4))等,应用统计回归法求出模型参数K0,K1, K2,即可根据生产工艺条件要求计算出首槽温度的预报值,用于指导并控制砂状氧化铝生产。
关键字: 砂状氧化铝; 温度控制; 准理论模型
first trough temperature in sandy alumina production
(College of Chemistry and Chemical Engineering,
Central South University, Changsha 410083, P.R.China)
Abstract:According to the practice of sandy alumina production, a sub-theory model is deduced based on the principle of thermodynamics and kinetics and the hypothesis of the steady state process of producing. By gathering the local data of producing, including the particle distribution φ(rc),temperature (T ), caustic ratio(Rp), the concentration of sodium caustic and sodium aluminate (c(NaOH), c(NaAl(OH)4)) and so on,the model parameters K1, K2, K3 can be obtained using the method of statistics regression. The first trough temperature is then conveniently predicted from the model.
Key words: sandy alumina; temperature control; sub-theory model