Experiment on sintering reactions of acid leaching residue from coal ash

被引：0

作者：

Han L. ^{[1
]}

Zhu P.-W. ^{[1
]}

Cheng L.-M. ^{[1
]}

Wang Q.-H. ^{[1
]}

Shi Z.-L. ^{[1
]}

Luo Z.-Y. ^{[1
]}

机构：

[1] State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou

来源：

Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2016年 / 50卷 / 05期

关键词：

Acid leaching residue; Kinetics; Silica; Sintering reaction; Thermodynamics;

D O I：

10.3785/j.issn.1008-973X.2016.05.020

中图分类号：

学科分类号：

摘要：

Sulfuric acid leaching residue was analyzed on coal ash of fluidized bed boiler (CFB) produced from northeast China in order to achieve the graded use of coal resource. The possible chemistry reactions of acid leaching residue with Na2CO3 as auxiliaries were studied during the sintering process, and the gibbs energy changes of the reactions were calculated. The effects of silica dissolution rate on malr(acid leaching residue): m2(Na2CO3), sintering time and temperature were studied, and the optimum conditions were determined as follow: 1153 K, 1.5 h, acid leaching residue and Na2CO3 were added in a mass ratio of 2:3. Under this condition, The dissolution rate of silica is 86%. Dynamics of the thermal decompose of acid leaching residue were explored, and the results suggest the process fit Crank-Ginstling-Braunshtein equation, and an apparent activation energy 156.46 kJ/mol for the decomposing reactions was derived from experimental data. © 2016, Zhejiang University Press. All right reserved.

引用

页码：955 / 960

页数：5

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