分级尾砂料浆输送性能及流变特性试验研究

Test on transportation performance and rheological property of classified tailings slurry

以莱西金矿分级尾砂、C料为试验材料,对分级尾砂进行粒径分析、沉降试验、泌水率试验、坍落度试验。试验得到莱西金矿分级尾砂属于粗粒级尾砂并且属于不良级配,充填料浆的保水性能与灰砂比、浓度呈正相关性。并对充填料浆进行流变特性试验,对试验所得屈服应力、塑性黏度随灰砂比变化进行拟合,得到屈服应力与塑性黏度的增长模型,其基本符合指数函数变化规律。屈服应力与灰砂比、料浆浓度呈正相关性,塑性黏度与料浆浓度呈正相关性,与灰砂比呈负相关性。试验研究结果对指导充填工程系统设计、调节充填材料配比、确定管道输送参数等具有重要的现实意义。

Using classified tailings and C powder as experimental material, experiments of size analysis, sedi- mentation test, bleeding test, slump test with the grades railings are completed. It can be concluded that the tailings are coarse and belongs to bad gradation. The cement-sand ratio and concentration is positively correlated with the performance of water holding of filling slurry. Through the rheological experiments and fitting the yield stress, plastic viscosity with the change of cement-sand ratio to get the growth model which are basically consistent with the law of exponential function. The cement-sand ratio and concentration is positively correlated with yield stress, concentra- tion is positively correlated with plastic viscosity and cement-sand ratio is negatively correlated with plastic viseosity. The result of this study has real significance for guiding design of filling engineering system, adjusting ratio of filling material, and determining parameters of pipeline transport.