Effects of AlN hydrolysis on fractal geometry characteristics of residue from secondary aluminium dross using response surface methodology  

响应曲面法研究二次铝灰中AlN水解对水解后残渣分形维数的影响（英文）

作　　者：Yong ZHANG Zhao-hui GUO Zi-yu HAN Xi-yuan XIAO 张勇;郭朝晖;韩自玉;肖细元(中南大学冶金与环境学院,长沙410083)

机构地区：[1]School of Metallurgy and Environment,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2018年第12期2574-2581,共8页中国有色金属学报（英文版）

基　　金：Project (21577176) supported by the National Natural Science Foundation of China;Project (2016,No.59-3) supported by the Environment Protection Scientific Research Project of Hunan Province,China

摘　　要：The effects of aluminium nitride(AlN)hydrolysis on fractal geometry characteristics of residue from secondary aluminium dross were studied using response surface methodology.The results show that the fractal dimensions of the residue can be significantly influenced by the AlN hydrolysis from secondary aluminium dross.The hydrolysis of AlN in the dross was spontaneous under temperatures of303-373K.The actual fractal dimensions of residue were significantly affected by the liquid-solid ratio(p<0.05)and changed from1.16to1.80,which accurately aligned with those from the calculations.Moreover,the fractal dimensions of residue were significantly affected by the interactions between hydrolysis temperature and hydrolysis time,liquid-solid ratio and hydrolysis time,respectively(p<0.01).The minimum fractal dimensions of the residue reached1.15under the optimized conditions,which included a hydrolysis temperature of30℃,liquid-solid ratio of5mL/g and hydrolysis time of10min.The results suggest that response surface methodology can guide in optimizing the conditions of AlN hydrolysis in order to obtain the minimum fractal dimensions of residue for improving the reutilization of the dross.利用响应曲面方法研究二次铝灰中AlN水解条件对水解后残渣分形维数的影响。研究结果表明,AlN水解显著影响水解后残渣分形维数。在303～373 K温度下,AlN水解标准状态下可自发进行,水解液固比显著影响水解后残渣分形维数(p<0.05),残渣维数实际变化范围为1.16～1.80,与计算值吻合度较高。此外,水解温度与水解时间之间交互作用,液固比与水解时间之间交互作用影响水解后残渣分形维数(p<0.01)。当二次铝灰中AlN水解优化条件为水解温度30?C、水解液固比5 mL/g和水解时间10 min时,残渣最小分形维数达到1.15。为提高二次铝灰综合利用,响应曲面法可以优化AlN水解条件以获得较小分形维数的残渣。

关 键 词：secondary aluminium dross AlN hydrolysis fractal dimensions optimization response surface methodology 

分 类 号：X758[环境科学与工程—环境工程] TQ133.1[化学工程—无机化工]