干熄焦炉防磨罩耐磨涂层喷涂技术的研发及应用.doc

干熄焦炉防磨罩耐磨涂层喷涂技术的应用 杜屏，吴波1，陈军伟2，李志华1，徐红艳3，徐秉声3，张利娜2，袁章福2 （1. 江苏沙钢集团有限公司，苏州 215625；2. 北京大学工学院，北京 100871. 北京矿冶研究总院，北京 100160）摘 要：的，进行实验， 关键词：Application of spray technology of wear resistant coating in CDQ furnace DU Ping1, WU Bo1, CHEN Junwei2, LI Zhihua1, XU Hongyan3, XU Bingsheng2,3, ZHANG Lina2, YUAN Zhangfu2 (1. Jiangsu Shagang Group Co., Ltd, Suzhou 215625, China; 2. Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing, 100871, China; 3. Beijing General Research Institute of Mining Metallurgy, Beijing 100160, China) Abstract: When CDQ system in coking plant of Jiangsu Shagang Group Co., Ltd. is operated, the wear mask of boiler is badly worn, or even the ceiling tubes of boiler are worn out and burst. Spray technology of wear-resistant coating of the wear mask in CDQ furnace is studied and carried out. Through the study of wearing of wear-resistant coating in CDQ furnace, coating experiment is carried out by the use of thermal spray coating technology. Crafts of coating process are designed combining with spraying material and process parameters of CDQ in coking plant of Shagang Group Co., Ltd. Coating performance is detected by using scanning electron microscopy, micro hardness tester, universal testing machines and other equipment. Wear mask of CDQ furnace is successfully developed, and it improves the production efficiency. Key words: wear mask; thermal spray coating technology; crafts research; coating performance 引 言 江苏沙钢集团有限公司（以下简称沙钢）的焦化厂干熄焦系统运行中，由于强化生产操作采取高气料比模式运行以及焦炭质量下降导致焦粉含量大幅增加等因素影响，锅炉防磨罩冲刷磨损严重，甚至发生锅炉吊顶管磨穿爆管事故[1]。为确保锅炉系统安全稳定运行，同时达到2年大修一次的要求（目前1~1.5年大修一次），提升干熄率指标，最大限度的减少湿熄焦对高炉的影响，根据区域工况参数，结合耐磨涂层的使用环境和性能需求，提出对干熄焦炉防磨罩耐磨涂层进行技术研发[2-3]。 防磨罩耐磨涂层应喷涂均匀、厚度一致，具有与母材结合良好、高温性能稳定、耐冲刷、耐腐蚀等特点，并且能够承受干熄焦炉工况变化导致的正常温差变化，不因喷涂材料使用的特殊要求而影响或制约干熄焦的生产，不因涂层作业而影响母材的性能及沙钢安装[4]。 1 干熄焦工艺参数及气体成分 图1为1和表2所示。 图1 干熄焦系统工艺流程图 干熄焦，是指采用惰性气体将红焦降温冷却的一种熄焦方法，简称CDQ(Coke Dry Quenching)。干熄焦发电的主要原理是，利用锅炉回收干熄焦系统880～980 ℃惰性循环气体的温度并吸收其热量，产生蒸汽用以供热和发电，以达到