Effect of inhibiting montmorillonite hydration swelling on coal slurry filtration

被引：0
|
作者：
Liu G. [1 ]
Liu W. [1 ]
Wang D. [1 ,2 ]
Yang Z. [1 ]
机构：
[1] School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing
[2] China Merchants Ecological Environmental Protection Technology Co., Ltd., Chongqing
来源：
Meitan Xuebao/Journal of the China Coal Society | 2018年 / 43卷
关键词：
Coal slurry; Filtration; Hydration swelling; Inhibitor; Montmorillonite;
D O I：
10.13225/j.cnki.jccs.2018.0068
中图分类号：
学科分类号：
摘要：
In order to investigate the effect of inhibiting montmorillonite hydration swelling on coal slurry filtra-tion, the filtration of coal slurry containing montmorillonite was carried out under inhibitory and non-inhibitory state, and the potassium chloride and three methyl benzyl ammonium chloride(TMBAC) were used as inhibitors. The results show that the hydration swelling of montmorillonite can be inhibited by potassium chloride and TMBAC. When the mass fraction of potassium chloride is 1.12% and the mass fraction of TMBAC is 0.4%, the anti-swelling rate of montmorillonite can reach 90%.The filtration of coal slurry containing montmorillonite carried out under inhibitory has lower filter cake moisture, shorter filtration time and larger dehydration rate, furthermore, the effect of filtration for coal slurry containing montmorillonite is better when using TMBAC as inhibitor. The hydration energies of K+ and C6H5CH2-N+(CH3)3 is lower. Therefore, K+ and C6H5CH2-N+(CH3)3 can adsorb on the interlayer of montmorillonite and limit the self-diffusion of interlayer hydrone and sodion. Besides, C6H5CH2-N+(CH3)3 can act as a filter aid and adsorb on the surface of montmorillonite and coal particles, which will increase the hydrophobicity of montmorillonite and coal particles. © 2018, Editorial Office of Journal of China Coal Society. All right reserved.
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页码：553 / 559
页数：6
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