全尾砂高浓度充填料浆流变特性试验研究

Experimental Study on Rheological Properties of High-concentration Filling Slurry with Full Tailings

全尾砂高浓度充填料浆流变参数的准确测试对实现其顺利输送至关重要。在流变参数测试过程中因测试方法不合理、测量试样的不确定性、流变模型选择不准确等原因,会造成测试结果不能反映料浆本质。针对上述问题,结合全尾砂高浓度充填料浆的触变性,开展了不同质量浓度全尾砂高浓度充填料浆流变特性测试分析,对比了3种流变模型拟合效果,并探索了最佳恒定剪切时间。结果表明,不同质量浓度料浆的流变特性差异较大,改进的Bingham模型对本次试验料浆流变特性曲线的拟合效果较好,最佳恒定剪切时间随料浆质量浓度的增大而增加。

Accurate testing on the rheological parameters of the high-concentration filling slurry with full tailings is essential for achieving smooth delivery.In the process of rheological parameter testing,the test results cannot reflect the nature of the slurry due to unreasonable test methods,uncertainty of measurement samples,inaccurate selection of rheological models and other reasons.Aiming at the above problems,combined with the thixotropy of high-concentration filling slurry with full tailings,the rheological properties of high-concentration filling slurry with full tailings were tested under different mass concentrations,and the fitting effects of three rheological models were compared.Then,an optimal constant shear time was discovered.The results showed that the slurry with different mass concentrations had quite different rheological properties.Finally,the improved Bingham model had a good fitting effect on the rheological characteristics of the slurry.The optimum constant shear time increased with the increase of slurry mass concentration.