铝灰渣中AlN水解行为及其多元非线性回归分析  

Hydrolysis behavior of AlN in aluminum dross and its multivariate nonlinear regression analysis

作　　者：吕帅帅[1] 倪威[1] 倪红军[1] 朱杨杨 LüShuai-shuai;NI Wei;NI Hong-jun;ZHU Yang-yang(School of Mechanical Engineering,Nantong University,Nantong 226019,China)

机构地区：[1]南通大学机械工程学院,南通226019

出　　处：《中国有色金属学报》2020年第4期920-926,共7页The Chinese Journal of Nonferrous Metals

基　　金：江苏高校优势学科建设工程资助项目(〔2018〕87);江苏省重点研发计划项目(BE2018093);江苏省墙体材料革新科研项目(201702,201703);南通市应用研究计划资助项目(JC2018115,JCZ18024)。

摘　　要：通过对铝灰渣水解反应过程中组分及其含量变化的研究,提出铝灰渣中AlN含量的修正公式;根据AlN含量和悬浊液pH值的测定,考察时间、温度、转速等水解参数对AlN水解速率的影响并对其进行多元非线性回归分析。结果表明:升高温度能降低铝灰渣中AlN含量并降低悬浊液pH值;延长时间可有效促进AlN的水解,同时在2h内悬浊液pH值迅速提升至高位;转速对AlN水解速率和悬浊液pH值无明显影响。总体而言,AlN含量比悬浊液pH值更能客观表征铝灰渣中AlN水解速率。对水解参数及修正后铝灰渣中AlN含量进行多元非线性回归分析并二次简化,发现理论值与实验值相对误差≤±8.65%。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.

关 键 词：铝灰渣 ALN 水解 多元非线性回归分析 温度 转速 时间 

分 类 号：TF09[冶金工程—冶金物理化学]