The bag in the dry gas inner-filtering bag dust filter for the blast furnance in ironworks would be frequently worn because of its overload,and consequently quite a large amount of dust left in gas.

• 近年来炼铁厂高炉冶炼强度不断提高,原来的煤气干式内滤式布袋除尘的过滤负荷过重,布袋常常破损,煤气含尘量高等缺陷就更加明显。