基于多重散射光理论的高岭石沉降特性研究

发布时间：2019-04-09 16:26

【摘要】：为研究煤泥水中最难处理的黏土矿物高岭石的沉降特性及悬浮液失稳的影响因素,利用Zeta电位仪和Turbiscan lab稳定性分析仪,采用稳定性动力学指数(TSI)和EDLVO理论,计算研究了煤系高岭石浓度、阳离子种类、阳离子浓度对高岭石悬浮液稳定性的影响。结果表明:随着高岭石悬浮液浓度的增加,体系TSI值越小,体系越稳定;高岭石悬浮液中加入阳离子,体系TSI值变大,体系明显失稳。阳离子浓度越大,体系TSI值越大,能垒越低,体系越不稳定;不同种类的阳离子对高岭石悬浮液失稳作用强度不同,在相同的离子强度下,阳离子对悬浮液失稳作用的强弱顺序依次为Na+Mg~(2+)Ca~(2+)。
[Abstract]:In order to study the sedimentation characteristics of the most difficult clay mineral kaolinite in the coal slime water and the influence factors of the suspension stability, the stability dynamic index (TSI) and the EDLVO theory are used to calculate the concentration and the cation species of the coal-based kaolinite by using the Zeta potential meter and the Turbiscan lab stability analyzer. The effect of the cationic concentration on the stability of the kaolinite suspension. The results show that with the increase of the concentration of the kaolinite suspension, the smaller the system TSI value, the more stable the system, the addition of the cation in the kaolinite suspension, the change of the system TSI value and the obvious instability of the system. The higher the cation concentration, the higher the system TSI value, the lower the energy barrier, the more unstable the system, and the different kinds of cations have different strength to the stability of the kaolinite suspension. Under the same ionic strength, the strength of the cation to the stability of the suspension is Na + Mg ~ (2 +) Ca ~ (2 +).
【作者单位】：中国矿业大学(北京)化学与环境工程学院;
【基金】：中央高校基本科研业务费专项基金资助项目(2015QH07)
【分类号】：X752

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