基于某矿山固废处置的水泥和胶固粉选择初探

Preliminary Exploration on Selection of Cement and Glue-Powder for Solid Waste Disposal in a Certain Mine

本文以某矿固废处置及露天坑回填综合治理为背景,由于该矿全尾砂为细粒级尾砂且尾砂内含有对充填体强度具有负面作用的硫及黏土类矿物,为了选择更适合该矿全尾砂的胶凝材料,选用水泥和胶固粉两种胶凝材料对充填料浆性能进行试验研究。研究结果表明:虽然泌水沉缩特性方面水泥胶结充填体较胶固粉更优,但在充填体强度及流动性两个关键性指标方面,胶固粉性能较水泥更优且成本更低,说明胶固粉更加适用于该矿固废处置及回填治理;通过敏感性分析可知,胶固粉胶结充填体强度对灰砂比最为敏感,其次为养护龄期,最后为料浆浓度。

Against the background of solid waste disposal and comprehensive treatment of open-pit backfilling in a certain mine,due to the fact that the unclassified tailings of the mine are fine faction tailings and contain S and clay minerals that have a negative impact on the strength of the filling body,in order to select a cementitious material that is more suitable for the full tailings of the mine,select cement and glue-powder as two types of cementitious materials to contact the experimental study on the performance of filling slurry,results indicate:although SBT filling body have better characteristics at the aspect of bleeding and settling compared to glue-powder,in terms of the two key indicators of filling strength and fluidity,the performance of glue-powder is superior to that of cement and the cost is lower,showing that glue-powder is more suitable for solid waste disposal and backfilling treatment in this mine;through sensitivity analysis,it can be concluded that the strength of cemented by glue-powder is most sensitive to the ash sand ratio,followed by the curing age,and finally the slurry concentration.