新型无砂仓尾砂胶结充填工艺技术

New Type Chamber-free Tailings Cemented Filling Technique

近年来利用选厂尾砂进行井下胶结充填的采矿方法在大中型地下铁矿山得到广泛应用,其尾砂胶结充填系统主要由立式砂仓和两级活化搅拌机组成,系统占地面积大,结构复杂,投资和运行费用较高。刘塘坊铁矿结合自己矿山的实际情况,利用本矿选厂尾砂进行旋流器浓缩实验研究,并使用自动化智能控制系统,研制、开发出一套低浓度无砂仓尾砂浓缩充填系统,在工业实践中应用,取得较好效果。通过工业实践,选厂尾砂利用率达到70%以上,尾砂浓缩浓度达到65%～70%;旋流器溢流实现自流进入尾矿库。整个充填系统实现远程集中控制,所有设备无需现场人工操作;应用智能加灰系统,精确控制充填所需灰比和浓度;通过故障自动判断和控制系统,实现了尾矿充填系统输送和尾矿库输送的自动切换。该系统占地面积小,结构简单,管理方便,投资、运行费用低,对于一些中小型地下矿山来说,具有一定借鉴价值。

In recent years,the underground cemented filling stoping method with tailing from dressing plant has been widely applied in large-medium underground iron mine.The tailing cemented filling system mainly consists of vertical chamber and two-stage activated agitator,which has characteristics of large site area,complex structure,and high investment and operation costs.Combined with the actual situation of mine,Liutangfang iron mine used tailings from its own dressing plant to carry out the thickening tests by hydrocyclone.A set of low concentration chamber-free tailing filling system is developed with the aid of the automatic intelligent control system.Its application in industry achieved good effect.The industrial application showed that the utilization rate of tailings reached more than 70%,and tailings concentration reached 65% ～ 70%.Overflows from cyclone directly went into the tailings pond.The whole filling system adopts the remote centralized control.No manual operation is needed on site.Meanwhile,the intelligent cement-adding system can realize the precise control of the desired cement ratio and the filling concentration.Through automatic decision and control of fault,the automatic transport switching between tailing filling and tailing ponds can be realized.The system has the advantages of small site area,simple structure,convenient management,low investment and low operation cost.It has a certain reference for similar small or medium underground mines.