某电厂250/390球磨机的筒体,由于衬板碎断砸伤筒体并使其变形长200厘米、宽43厘米,断裂3处,共约350平方厘米。同时,又引起筒体法兰变形,端跳动量5毫米。如不及时修复,将影响球磨机的安全运行。这项修复任务交由我厂负责,采用挖补方法进行了修复,效果良好。修复后经外观检查,挖补焊缝及热影响区 A power plant 250/390 ball mill cylinder, as a result of broken lining rupture of the cylinder and deformation of 200 cm long, 43 cm wide, broken 3, a total of about 350 square centimeters. At the same time, it also caused the deformation of the cylinder flange, the end of the amount of beating 5 mm. If not repaired in time, will affect the safe operation of the ball mill. The repair tasks entrusted to my factory responsible for the use of digging methods were repaired, the effect is good. After repair by the appearance of inspection, digging weld and heat affected zone