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在金属矿山的选矿厂,将尾矿砂排送到尾矿坝,通常采用管道水力输送系统。从经济性出发,管路一般均采用普通铸铁(球墨铸铁或灰口铸铁)管。管内高速流动的高压、高浓度砂浆不断地冲刷管壁,形成冲蚀磨损和磨粒磨损,直至管壁磨穿而爆裂,被迫停机停产。由于磨损只在管道内壁进行,整个管路系统处于封闭式运行状态,无法直接监测。另外管路沿自然地势铺设,各段管路磨损极不均匀,因而无法预知运行中各段管路的实际壁厚,直到发现管道磨穿发生泄漏时才停产更换,或者盲目地定期更换管道,这样不仅在经济上带来重大损失,而且严重影响矿山正常生产。因此对于尾矿管路
At metal mines, tailings are discharged to the tailings dam, often using a pipeline hydraulic transfer system. Starting from the economy, the pipeline are generally used ordinary cast iron (ductile iron or gray cast iron) pipe. Pipe high-speed flow of high-pressure, high concentrations of mortar scouring the wall, the formation of erosion wear and abrasive wear until the wear and tear of the tube wall wear, was forced to stop production. As the wear only in the pipe wall, the entire pipeline system is in closed operation, can not be directly monitored. In addition, the pipeline is laid along the natural topography, and the pipelines in each section are worn extremely unevenly. Therefore, it is impossible to predict the actual wall thickness of the pipelines in each section of the pipeline until it is found that there is a leak in the pipelines. Otherwise, This not only brought significant economic losses, but also seriously affect the normal production of mines. So for the tailings pipeline