Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第26卷    第4期    总第205期    2016年4月

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文章编号:1004-0609(2016)-04-0919-09
响应曲面法对铝灰中AlN的水解行为
张 勇,郭朝晖,王 硕,肖细元

(中南大学 冶金与环境学院,长沙 410083)

摘 要: 铝冶炼过程中会产生大量铝灰,铝灰中AlN对其综合利用和安全处置会产生显著影响。在系统分析AlN水解热力学基础上,以再生铝生产过程中产生的铝灰为原料,运用Design Expert软件设计二次正交旋转试验,研究铝灰中AlN的水解特征。结果表明:在303~373 K的温度范围内,铝灰中AlN的水解自发进行;液固比和水解时间对水解pH影响显著(P<0.01);水解温度和液固比间的交互作用影响明显(P<0.01)。水解pH值与水解温度、液固比和水解时间的二次回归方程理论预测值与试验值相对误差仅为1%,可以用来预测和指导铝灰中AlN水解行为。

 

关键字: 铝灰;AlN;水解;响应曲面

Hydrolysis behavior of AlN in aluminum dross with response surface methodology
ZHANG Yong, GUO Zhao-hui, WANG Shuo, XIAO Xi-yuan

School of Metallurgy and Environment, Central South University, Changsha 410083, China

Abstract:A large quantities of aluminum dross are produced from aluminum smelting activities. The reuse or disposal of the dross is significantly affected by AlN in aluminum dross. The hydrolysis thermo-dynamic behaviors of AlN in the aluminum dross were studied through the Design Expert for two orthogonal rotational experiments, which is from the recycled aluminum process. The results show that the hydrolysis reaction of AlN in aluminum dross is spontaneous at the temperature from 303 K to 373 K. The pH value in hydrolysis system is significantly affected by the liquid-solid ratio (L/S ratio) and reaction time (P<0.01), respectively. The interaction between reaction temperature and L/S ratio is significant (P<0.01). Based on the quadratic regression equation between the pH of hydrolysis system and the parameters, such as hydrolysis temperature, L/S ratio and hydrolysis time, the relative error between the theoretical value and the trial value is only 1%, and the result shows that it is reliable to prospective the hydrolysis behaviors of AlN in aluminum dross.

 

Key words: aluminum dross; AlN; hydrolysis; response surface

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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