(平果铝业公司， 平果 531400)
摘 要: 根据实际生产数据及溶出和稀释过程的实际物料平衡，探讨了溶出液真实Rp真的计算方法，克服了不能通过取样分析得到溶出液真实Rp真的困难。通过回归分析得出了平果铝生产条件下溶出液真实Rp真随溶出进料量和溶出液表观Rp表变化的数学模型。分析了溶出液表观Rp表与真实Rp真差值产生的原因，并提出了减小ΔRp和提高溶出液真实Rp真及氧化铝综合回收率的主要途径在于：优化闪蒸操作，降低闪蒸出口温度； 提高石灰分解率和活性度，在保证溶出性能的前提下，尽量减少进入溶出系统的CO2量和石灰加入量。
关键字: 溶出液； 真实Rp； 氧化铝； 数学模型
（Pingguo Aluminum Company， Pingguo 531400， P.R.China）
Abstract:Using actual production data and mass equilibrium in digestion and dilution processes， the method of calculating digestion liquor real Rp was discussed and the difficulty in obtaining real Rp by sampling and analyzing was overcome also. Moreover， under the operation condition of Pingguo Alumina Refinery， math model of digestion liquor real Rp depending on digestion feeding rate and apparent Rp was regressed with actual production data. Reasons of difference between apparent Rp and real Rp were analyzed. The ways of lessening the difference and increasing digestion liquor real Rp and alumina recovery rate were as follows: making flash tank operation better and lowering temperature of digestion slurry at last flash tank outlet; increasing decomposition rate and activity of lime and decreasing quantities of CO2 and lime into digestion system as much as possible under assuring proper digestion performances.
Key words: digested liquor； real Rp; alumina； math model
