Preparation of Polysilicate Aluminum Chloride from Coal Gangue and Its Flocculating Performance Assessment

被引：0

作者：

Ning Q. ^{[1
]}

Li C. ^{[1
]}

Liu X. ^{[2
]}

Wang B. ^{[3
]}

Hong Y. ^{[1
]}

Wang X. ^{[1
]}

机构：

[1] Institute of Mining Technology, Liaoning Technical University, Fuxin

[2] China Coal Tianjin Design & Engineering Co. LTD, Tianjin

[3] College of Resources and Environment, University of Chinese Academy of Sciences, Beijing

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2023年 / 51卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

Coal gangue; Polysilicate aluminum chloride; Response surface; Slime water; Turbidity removal rate;

D O I：

10.14062/j.issn.0454-5648.20220375

中图分类号：

学科分类号：

摘要：

Polysilicate aluminum chloride (PASC) flocculant was prepared with a coal gangue for the resource utilization of coal gangue.The effects of alkali cement ratio, roasting temperature, acid dosage, acid leaching temperature, liquid to solid ratio and acid leaching time on the performance of PASC were investigated.The physicochemical properties and microstructure of PASC were analyzed and the flocculation mechanism of PASC was discussed.The results show that the turbidity removal rate of PASC to coal slime water can reach 99.08% under the optimum conditions (i.e., alkali cement ratio of 0.9, roasting temperature of 900 ℃, acid dosage of 1.75 g/g, acid leaching temperature of 49 ℃, liquid to solid ratio of 8.9, and acid leaching time of 2.8 h).Since PASC is an amorphous polymer formed by the complexation of polysilicic acid, aluminum ions and hydroxyl groups, it has a rich spatial network structure and its flocculation mechanism includes adsorption bridging, trapping and sweeping, and charge neutralization. © 2023, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：204 / 214

页数：10

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