碳酸钙悬浮液混凝处理后的流变性

应用LVDV-Ⅲ+型可编程流变仪测定了微米级碳酸钙悬浮液混凝处理后的流变特性,考察因素包括悬浮液固相质量浓度、pH值、混凝剂种类及添加量、搅拌速度.结果表明,混聚后碳酸钙悬浮液在测定范围内流变曲线符合Herschel-Bulkley模型.表观粘度随颗粒浓度的增大而增大,其中屈服应力随体系浓度的增大而增大,刚性系数随体系...

A Study on the Rheo-parameters of Coagulation Treatmented CaCO_3 Suspensions

The rheological parameters of Coagulation treatmented CaCO3 suspensions were measured by using a programmable LVDV-Ⅲ+ rheometer.The influences of the suspension solid concentration,pH,coagulant type and dosage,stirring speed on the rheo-parameters of the suspensions were examined and analyzed.It was shown that the rheological behavior of the Coagulation treatmented suspensions could be described by the Herschel-Bulkley model.As expected,the apparent viscosity was enhanced and then decreased with the suspension solid concentration,yield stress with the system in which the concentration increases,the stiffness increases with the system of concentration decreases and then increases.Not only affect the yield stress of solid concentration,more essential is the aggregate.pH value increases,changes in the hydrolysis and charged particle surface conditions,the apparent viscosity first increases and then decreases.With the PAM dosage increases,the apparent viscosity first increased and then decreased,while adding the changes in PAC opposite.Stirring rate system changed the role of composition and form,so that the apparent viscosity increases with the stirring speed increases and then decreases.