全粒级碎石胶结泵送充填系统优化改造研究

针对全粒级碎石胶结泵送充填系统存在充填成本高、泵送难度大、堵管风险高的问题,对大梁矿业碎石骨料、水泥的粒级分布进行了测试,结果显示灰砂比为13.81的充填料才能满足极细颗粒含量大于20%的要求。提出了添加磨细粉料代替水泥的工艺方案,通过开展现场工业泵送试验、充填体强度试验,找出了合理的水泥、细粉料、碎石配比,并据此对充填系统给料工艺进行了优化改造。结果表明,采用磨细粉料中的极细颗粒代替水泥中极细颗粒的方案在工业上可行,显著降低了矿山充填成本和泵送难度,顺利实现了全粒级碎石泵送胶结充填系统的低成本和安全可靠运行。

Study on the optimization and improvement of the filling system for the filling system of the whole particle size of the crushed stone cement

The full size gravel cementing pump filling system is high, the cost of filling pump is difficult, plugging the high risk, the particle size distribution of mineral aggregate and cement beams were tested, results showed that sand ratio for filling 1:3.81 to meet the extremely fine particle content of more than 20% requirements. The addition of pulverized material to replace cement process, by carrying out on-site industrial pumping test, the strength of the filling body test found the reasonable cement, fine powder, the proportion of the aggregate, and the filling system was optimized for batch process. The results show that using a very fine powder instead of finely ground particles of very fine particles in the cement industry in the scheme is feasible and can significantly reduce the cost of mine filling and pumping difficulty, low cost and safe and reliable operation of the smooth realization of the full size gravel pump cementing filling system.