不同胶凝剂浆体含量流变特性研究

Rheological Characteristic of Slurries Containing Different Binding Agents

为探究胶凝剂的种类以及含量对罗河铁矿充填料浆流变特性的影响,采用Brookfield R/S plus型流变仪对罗河铁矿全尾砂、全尾砂与水泥、全尾砂与胶固粉浆体进行流变性能研究,分析不同料浆浓度和不同胶结剂对浆体的流变曲线、屈服应力、黏度系数和沿程阻力损失的影响。结果表明:随充填浓度的增加,全尾砂料浆的屈服应力和黏度均不断增加;全尾砂与水泥和全尾砂与胶固粉充填料浆的屈服应力随着充填浓度的增加而增加;水泥和胶固粉的加入均会增大全尾砂料浆的屈服应力,但水泥的加入降低了料浆的黏度;水泥和胶固粉的加入均增大了全尾砂料浆的沿程阻力损失;随着浓度的增大,沿程阻力损失增大,最优浓度为66%~68%。

In order to explore the influence of the type and content of gelling agent on the rheological properties of filling slurry of Luohe Iron Mine,Brookfield R/S plus rheometer was used to study the rheologi⁃cal properties of Luohe Iron Mine's unclassified tailings,unclassified tailings and cement,and unclassified tailings and cementitious powder slurry.The effects of different slurry concentrations and different binders on the slurry's rheological curve,yield stress,viscosity coefficient and resistance loss along the way were an⁃alyzed.The results show that with the increase of filling concentration,the yield stress and viscosity of un⁃classified tailings slurry increase continuously.The yield stress of unclassified tailings and cement and un⁃classified tailings and cementitious powder filling slurry increases with the increase of slurries concentra⁃tion.The addition of cement and cementitious powder will increase the yield stress of the unclassified tail⁃ings slurry,but the addition of cement will reduce the viscosity of the slurry.The addition of cement and ce⁃mentitious powder will increase the edge of the unclassified tailings slurry.The resistance loss along the route increases with the increase of the concentration and the optimal concentration is 66%~68%.