(中南大学 资源与安全工程学院，长沙 410083)
摘 要: 以某铅锌银矿全尾砂浆恒定剪切流变实验为例，探讨不同质量浓度下，APAM添加前后似膏体流变参数的变化，并分析影响机理。结果表明：APAM使砂浆更加稳定；APAM增大砂浆的切应力和表观黏度值；质量浓度越大，砂浆的平衡切应力和平衡表观黏度增大值越大，随剪切速率的增加，平衡切应力和平衡表观黏度增加幅度减小。随剪切速率增加，APAM高分子破坏程度加大，“桥连”对流变参数的作用情况增强；随质量浓度增大，APAM高分子对流变参数的影响程度加强，随剪切速率的增加，流变参数的增大值减小。
关键字: APAM；似膏体；质量浓度；流变参数
（School of Resources and Safety Engineering, Central South University, Changsha 410083, China）
Abstract:Take rheological test with constant shear of full tailings slurry of a Pb-Zn-Ag mine as example, the changes of rheological parameters of paste-like slurry were discussed before or after APAM addition under different mass concentrations, and the influence mechanism was analyzed. The results show that APAM makes slurries more stable. APAM enlarges values of shear stress and apparent viscosity. With the increase of mass concentration, increment values of stabilized shear stress and stabilized apparent viscosity of slurries grow, and the increase of stabilized shear stress and stabilized apparent viscosity decreases with increasing shear rate. With the increase of shear rate, destructiveness of APAM macromolecule grows, effect degree of linking on rheological parameters grows. As the increase of mass concentration, influence degree of APAM macromolecule on rheological parameters grows, and increment values of rheological parameters decrease with the increase of shear rate.
Key words: APAM; paste-like slurry; mass concentration; rheological parameter
