The large bell damage speed of the bell type blast furnace in Angang Ironmaking Plant was increased from the beginning of 1999 to the end of 2000. 5 bells were replaced in 1999, 8 bells in 2000. The service life of the bell was obviously decreased.

• 从 1999年年初到 2 0 0 0年年末 ,鞍钢炼铁总厂钟式高炉大钟破损速度加剧 ,1999年先后更换了 5个大钟 ,2 0 0 0年更换了 8个大钟 ,大钟的使用寿命明显降低。