粉煤灰制备氢氧化铝晶核生长动力学数学模型  

The study on kinetic model of alumina trihydrate crystal growth prepared from flyash

作　　者：阳勇福[1] 方荣利[1] 

机构地区：[1]西南科技大学材料学院,四川绵阳621010

出　　处：《无机盐工业》2005年第9期40-43,共4页Inorganic Chemicals Industry

基　　金：国家中小企业创新基金资助项目(03C26215100240)。

摘　　要：以粉煤灰为原料,从碳化法制备超细氢氧化铝的工艺参数入手,对氢氧化铝晶核生长动力学数学模型的建立进行了研究。通过单因素实验分别构建铝酸钠溶液质量浓度、碳化温度、分散剂用量、二氧化碳体积分数、pH、A试剂加入量、碳化通气速度等各因素对氢氧化铝粒径影响的回归方程,建立氢氧化铝晶核生长动力学数学模型,然后通过正交实验建立方程组确定各因子相关系数。模型检验结果表明,误差在5%以内,具有一定的可信度。To prepare ultrafine alumina trihydrate from flyash, the establishment of kinetic model of alumina trihydrate crystal growth has been studied, starting with technical parameters by carbonation. Through single factor experiment, the regression equations about the concentration of sodium aluminate solution, the carbonation temperature, the dispersant dosage, the content of CO2 , the pH value, the A reagent dosage and the velocity of CO2 gas which influencing the particle size have been established respectively. The kinetic model of alumina trihydrate crystal growth has also been established, and the correlative coefficients are obtained by the orthogonal experiment that can set up equations. The results of experiment show that error is less than 5% and the model is reliable.

关 键 词：粉煤灰 氢氧化铝 晶核生长 动力学数学模型 

分 类 号：TQ170.9[化学工程—硅酸盐工业] O78[理学—晶体学]