某矿山全尾砂高浓度充填强度及流变性能试验研究

Experimental study on high concentration filling strength and rheological property of total tailings in a mine

某矿山目前采用分级粗尾砂胶结充填工艺。选厂浮选全尾砂泵送至充填站,经一段分级脱泥粗尾砂自流至砂仓中,形成饱和尾砂,细尾砂泵送至尾矿库。针对分级粗尾砂充填泌水率较大,凝固时间长,强度低等问题。开展了该矿山全尾砂高浓度充填配比试验,研究内容主要包括某矿山全尾砂及胶结料物化性质检测,充填体抗压强度及充填料浆流变性能检测。研究结果表明,全尾砂作为充填骨料具有良好的充填效果,满足矿山生产需要。充填料浆流变曲线符合Herschel-Bulkley(H-B)流变模型。根据试验结果,推荐适合矿山全尾砂充填配比方案。

A mine is currently using the cemented filling technology of graded coarse tailings.The flotation tailings of the concentrator are pumped to the filling station,and the coarse tailings flow to the sand silo through a stage of graded desliming to form saturated tailings,and the fine tailings are pumped to the tailings pond.In view of the problems of high bleeding rate,long solidification time and low strength of graded coarse tailings filling.The high concentration filling ratio test of total tailings in the mine was carried out,and the research contents mainly included the detection of physical and chemical properties of total tailings and cementing material in a mine,as well as the detection of compressive strength of backfill and rheological properties of filling slurry.The results show that the total tailings as filling aggregate has a good filling effect and can meet the needs of mine production.The rheological curve of the filling slurry conforms to the Herschel-Bulkley(H-B)rheological model.According to the test results,the ratio scheme suitable for the full tailing filling is recommended.