Water cutting. Water cutting is to use high-pressure water flow and abrasive particles to cut the waste oil drum, and through continuous grinding and cutting, the oil tank is cut into the required shape. Because the oil tank material is thick and needs to be cut for a long time, gas cutting, flame cutting and other cutting methods will produce thermal stress, which may lead to the explosion of waste oil drums, while the water knife cutting process will not produce thermal stress, which greatly reduces the risk of fire and explosion. At the same time, there is no dust, waste gas and waste water pollution in the processing process, no pollution and damage to the environment, no potential safety hazard to the staff and the surrounding people, and it is very safe.