本文讨论了在工作条件十分恶劣的高炉风口和渣口上喷涂耐热防护涂层的问题。就涂层的设计、涂层的性能、喷涂设备和工艺以及现场试验结果作了介绍。考虑到涂层与基材热物理性能上的差异,通过热震试验,选择了复合涂层。喷涂渣口经现场试验,寿命提高了两倍多。本文还对耐热防护涂层的发展方向作了讨论。 This article discusses the problem of spraying heat-resistant protective coating on blast furnace tuyere and slag hole with poor working conditions. The design of coating, the performance of coating, spraying equipment and process as well as the field test results are introduced. Taking into account the difference between the thermal physical properties of the coating and the substrate, the composite coating was selected through the thermal shock test. Spraying slag by the field test, life expectancy increased more than twice. This article also discussed the development of heat-resistant protective coating.