不同流变剂对某矿全尾砂膏体充填性能的影响

Influence of Different Rheological Agents on the Filling Performance of Full Tailings Paste in a Mine

为了保证某矿全尾砂膏体充填料浆的安全高效输送,采用定性和定量分析方法分析了不同流变剂类型及掺量对于料浆流变特性和充填体强度的影响规律。结果表明:添加3种流变剂后,膏体充填料浆的流变特性得到明显改善,且掺量越多,流变参数整体降幅越大,但掺量过多会使料浆产生离析沉降现象。添加流变剂后,对于充填体1 d强度影响较大,但对于3 d、7 d、14 d、28 d强度几乎无影响。最佳流变剂选型为YSKJ01,掺量为0.4%时,全尾砂膏体充填性能达到最优。从微观角度阐述了流变剂对于改善全尾砂胶结充填料浆流变特性的作用机理,为该矿全尾砂膏体充填配比设计提供参考。

In order to ensure the safe and efficient transportation of the full tailings paste filling slurry in a mine,the effect of different types and dosages of rheological agents on rheological properties of the slurry and strength of the filling body were analyzed by qualitative and quantitative perspectives.The results show that after adding three types of rheological agents,the rheological properties of the paste filling slurry are significantly improved in general,and the more the dosage,the greater the decrease in rheological parameters.However,excessive dosage can cause segregation and sedimentation of the slurry.The addition of rheological agents has an impact on the strength of the filling material at 1d,but has almost no effect on the strength at 3,7,14,and 28d.The optimal rheological agent selection is YSKJ01,and when the dosage is 0.4%,the filling performance of the full tailings paste reaches the optimal value.From the microscopic perspective,the mechanism of the rheological agent to improve the rheological properties of the full tailings cemented filling slurry is expounded,which provides a reference for the design of the full tailings paste filling ratio of the mine.