(南通大學 機械工程學院，南通 226019)
摘 要: 通過對鋁灰渣水解反應過程中組分及其含量變化的研究，提出鋁灰渣中AlN含量的修正公式；根據(jù)AlN含量和懸濁液pH值的測定，考察時間、溫度、轉速等水解參數(shù)對AlN水解速率的影響并對其進行多元非線性回歸分析。結果表明：升高溫度能降低鋁灰渣中AlN含量并降低懸濁液pH值；延長時間可有效促進AlN的水解，同時在2h內懸濁液pH值迅速提升至高位；轉速對AlN水解速率和懸濁液pH值無明顯影響。總體而言，AlN含量比懸濁液pH值更能客觀表征鋁灰渣中AlN水解速率。對水解參數(shù)及修正后鋁灰渣中AlN含量進行多元非線性回歸分析并二次簡化，發(fā)現(xiàn)理論值與實驗值相對誤差≤±8.65%。
關鍵字: 鋁灰渣；AlN；水解；多元非線性回歸分析；溫度；轉速；時間
（School of Mechanical Engineering, Nantong University, Nantong 226019, China）
Abstract:The modified equation of AlN content in aluminium dross was put forward by studying the change of each component and its content in the process of aluminium dross hydrolysis reaction. The effects of hydrolysis parameters such as time, temperature and rotational speed on the hydrolysis rate of aluminium dross were investigated according to the measure of AlN content and pH of suspension. The hydrolysis parameters and the modified content of AlN in aluminium dross were analyzed by multivariate nonlinear regression analysis. The results show that the AlN content in the aluminum dross and the pH value of the suspension reduce with the increase of temperature. The hydrolysis of AlN can be effectively promoted with the prolongation of time, and the pH value of the suspension is simultaneously raised to a high level within 2 h. The rotational speed has no obvious effect on the hydrolysis rate of AlN and the pH value of suspension. Generally speaking, the way of the content of AlN is more objective than the pH value of suspension to characterize the hydrolysis rate of AlN in aluminum dross. Multivariate nonlinear regression analysis and secondary simplification on the hydrolysis parameters and the modified content of AlN in aluminium dross show that the relative error between the theoretical value and the experimental value is within ±8.65%, which has a certain guiding significance for the prediction and control of the modified content of AlN in aluminum dross during the hydrolysis process.
Key words: aluminum dross; AlN; hydrolysis; multivariate nonlinear regression analysis; temperature; rotational speed; time
