除尘风机硬面技术

Hard-Surface Technology of Dust-Blowing Fan Facilities

分析浦钢炼钢厂除尘风机失效的原因是风机叶片在烟气、粉尘的冲刷和腐蚀下，产生了不均匀的磨损和腐蚀，造成风机转子的动平衡失效，致使机组振动加剧无法正常运行。通过改进叶片耐磨衬板的设计制作方案，并从焊条的工艺性能、堆焊金属的化学成分、堆焊金属的硬度及金相方面进行了试验研究，优化了堆焊材料。采用新材料新技术制作耐磨衬板的风机，使用寿命比原来提高1～2倍。

Failure causes of dust-blowing fans at the Steel-making Plant of Pudong Iron ＆ Steel Co. , Ltd. are analyzed. The fan unit could not run smoothly because of dramatic vibration caused by failure of the fan rotor＇ s dynamic equilibrium, and the failure was caused by the fan laminas＇ wear and corrosion which is inevitable in an environment full of smoke and dust. Materials for repair welding have been optimized by improving the design and manufacture plan for the lamina＇ s wearable welts and by studying performance of welding rods, chemical composition, hardness and fine texture of metals for repair welding. As the wearable welts are made of new materials and new technology is adopted, the fan has prolonged its service life by one or two times.