苏皖凹凸棒石粘土水悬浮液流变性能研究

研究了3种苏皖凹凸棒石粘土水悬浮液的流变性,讨论了矿物种类、粘土颗粒大小、NaCl浓度、pH值、电解质类型、分散剂添加量等影响因素对于凹凸棒石粘土水悬浮液流变性的影响,并用卡森模型对3种凹土流型曲线进行了拟合.结果表明,不同凹土中含有少量不同杂质对流变性能影响不大;经过挤压的土样粘度明显大于原矿粉碎的样品;粘土颗粒大小、溶液pH值、电解质类型、分散剂均会较大程度的影响凹土悬浮液的流变性能,其中分散剂的降粘效果最为明显;而NaCl的浓度增加对凹土悬浮液流变性影响则很小.

Rheological properties of aqueous suspensions of palygorskite from Jiangsu and Anhui

Aqueous suspension rheology of three kinds of palygorskite clays from Jiangsu and Anhui was investigated as a function of the composition of clays, and different concentrations of NaCl solution, pH, different electrolyte solutions, dosages of dispersant, and linear methods were applied for fitting the Theological parameters to Casson model. The results show that small amounts of other impure minerals do not affect the rheological properties seriously, and that the samples subjected to crushing from the original days are in line with the Casson model. The sizes of clays, pH values, different electrolyte solutions, and the addition of dispersant can affect the rheological properties, and the addition of dispersant is the most important affecting factor. Nevertheless, the effect of the concentrations of NaCl solution is not significant.