热镀锌炉鼻子加湿工艺控制研究与改进

Research and Improvement of Furnace Snout Humidification Process Control for Hot-Dip Galvanizing

锌灰是热镀锌生产过程中的重要缺陷,对于高表面级别要求的产品影响较大。在热镀锌生产过程中,锌蒸气在炉鼻子内氧化形成的锌灰容易黏附在带钢表面,影响镀层的表面质量。目前有效的控制措施即采用炉鼻子加湿控制露点,炉鼻子露点控制过高或过低均会产生缺陷。阐述了根据现有工况,通过控制压力、流量等工艺参数,选择合适的露点的控制方法。

Zinc ash is a serious defect of hot-dip galvanized process and has great impact on products with high surface level requirements.During galvanizing process,the zinc ash formed by the oxidation of zinc vapor in a furnace snout was easy to adhere to the surface of strip steel,influencing the surface quality of the coating.At present,the effective control measures were to control the dew point by humidifying the furnace snout.If the dew point of the furnace snout was too high or too low,it would produce defects.In this paper,the control methods of selecting the appropriate dew point by controlling the process parameters such as pressure and flow were expounded according to the existing working conditions.