四川大渡河钢铁厂3号高炉(112m~3)的煤气系统中,旋风除尘器、半荒煤气管、布袋除尘器已采用膨胀珍珠岩制品保温,而重力除尘器及重力除尘器至旋风除尘器的煤气管却未保温。开炉以来,炉顶温度一直都在80～120℃,净煤气温度在40～60℃。由于布袋除尘器的工作温度达不到80℃以上,煤气中的水份由气态变成液态,浸润布袋和设施,有时放灰阀有滴水现象,严重影响布袋过滤和设备清灰,布袋破损严重;时有管道塞堵;热风炉烧炉困难,使用期短,布袋 In the gas system of No.3 blast furnace (112m ~ 3) in Daduhe Steel Plant of Sichuan, the cyclone dust collector, half-gas pipe and bag filter have been insulated with expanded perlite products, while the gravity dust remover and gravity dust remover The gas pipe is not insulated. Since the furnace, the roof temperature has been 80 ~ 120 ℃, net gas temperature at 40 ~ 60 ℃. As the working temperature of the bag filter does not reach more than 80 ℃, the water in the gas will change from gas to liquid, infiltrating the bag and facilities, sometimes dropping the ash valve, which will seriously affect the bag filter and equipment cleaning, the bag is damaged seriously ; When the plug plugs; hot stove furnace difficult, short life, bag