Tailings rubber-lined pipeline descaling method

Abstract

The invention provides a tailings rubber-lined pipeline descaling method. The method is characterized in that a pipe cleaning launching device with an online switching function is installed at the outlet of a tailings pipeline; a pipe cleaner is put into a launching barrel of the pipe cleaning launching device, and the pipe cleaner is pushed by pressure to remove impurities. By means of the method, the pressure of the tailings outlet can be remarkably decreased by 0.7-0.9 Mpa; and by conducting mechanical descaling on the tailings pipeline, the delivery pressure of a membrane pump is decreased, the delivery flow is increased, and frequent equipment shutdown caused by high pressure is eliminated.

Description

technical field [0001] The invention belongs to a scale removal method for iron ore tailings conveying pipelines. Background technique [0002] Taiyuan Iron and Steel Group Yuanjiacun iron ore tailings system is a process in which the diaphragm pump is transported to the tailings dam through pipelines. The total length of the pipeline is 6.5km, the outer diameter of the pipeline is 660.4mm, and the pipeline between 0-3km is a steel-rubber composite pipe , the wall thickness of the steel pipe is 12.7mm, the thickness of the lining rubber is 6.35mm, and the inner diameter is 622.3mm. The rest of the pipes are bare steel pipes, the wall thickness is 14.27mm, and the inner diameter is 631.86mm; The maximum pressure of the pump is 6Mpa, set 6.2Mpa to protect and trip. In order to protect the safety of the rubber-lined pipeline, no pigging operation was carried out to clean up the construction waste in the pipeline after the pipeline was installed. As the tailings conveying press...

AI Technical Summary

Problems solved by technology

In order to protect the safety of the rubber-lined pipeline, no pigging operation was carried out to clean up the construction waste in the pipeline after the pipeline was installed. As the tailings conveying pressure gradually increased, the increase was about 0.6Mpa under the same conveying flow and concentration, causing the diaphragm pump The pressure exceeds the protection pressure, and frequent trips stop, seriously restricting the normal transportation of the tailings system