Abstract: The process flow sheet, key equipment and technology characteristics for maximum coil weight 35 t, 2 ~ 16 mm hot rolled stainless steel strip annealing and pickling line are presented. The steel grades produced in the line are austenite ,ferrite and martensite stainless steel； the strip is heated in annealing furnace by natural gas, the furnace temperature is up to 1 180 °C and the total furnace length is 96 m； the effective descaling is carried out before pickling, the pickling solutions are sulphuric acid and nitric acid + hydrofluoric acid, the maximum speed of pickling is 60 m/min, the waste water and waste acid are recovered and regenerated, and the acid mist are also recovered and treated.

Key words: Hot Rolled, Stainless Strip, Annealing, Pickling

摘要： 介绍了最大卷重35 t、2～16 mm热轧不锈钢带退火酸洗线的工艺流程、关键设备和技术特点。该机组所生产的钢种有奥氏体、铁素体和马氏体不锈钢;退火炉使用天然气加热钢带,炉温可达1180℃,炉子总长96m;在酸洗前进行有效除鳞,酸洗的溶液为硫酸,硝酸+氢氟酸,酸洗最大速度为60 m/min,废水和废酸经回收再利用,酸雾经回收和处理。

关键词: 热轧, 不锈钢带, 退火, 酸洗