Blast furnace maintenance and shutdown: continue for a long generation furnace served, its equipment, structure, lining be worn in production, some way in need of repair, and some want to break the wind, and some want to shutdown to be replaced, such work called maintenance. Access by time and nature can be divided into four categories: temporary maintenance, preventive maintenance, repair and overhaul. A temporary repair and regular maintenance overhaul mainly refers to temporary change vents and small slag tap, also including small repair work must address. Temporary access to off the wind, the wind off the program on short-term operations. To replace the air when regular maintenance or in large sets of sets, air pipe, part of the furnace body cooler, skip, hot air valve, distributor, etc. Periodic maintenance time is short, there are more than ten hours, kiln design, up to several days long, active lime kiln, so long off the air by the blast furnace process. Second, in the repair and overhaul of heavy maintenance work, can not be processed in time during routine maintenance, it should be carried out in a blast furnace repair. In the repair projects are: repair, relining, replace the upper cooler, environmental protection lime kiln, replace distributor, hoist rope wheel. In the generation furnace process, repair once or twice normal. The repair time required for five days to a month, lime kiln, with the workload varies. The repair of the blast furnace to be shutdown, but hold residual iron. Are hearth furnace charge to hold in addition, depending on whether the replacement hearth brick lining and cooler. Overhaul including the replacement of all lining (especially the bottom), the replacement of one or all of the metal structure, expanding blast volume and the like. Overhaul time to be 30 to 45 days, medium-sized blast furnace is 25 to 40 days. 1 injection castable first problem to be solved is the injection castable rheological properties can be pumped, and its rheological properties determine whether it can successfully transport. The main way to solve include: ① choice of raw materials and particle size distribution: dense near round particles aggregate and reasonable particle size distribution; ② superplasticizer applications: Depending on the raw material selection, type and amount of powder with a suitable The plasticizer. Second, it must solve injection molding condensate castable moment, only their proper plastic condensate level in order to ensure the injection of the material does not flow, the rebound effect of low and pouring with similar compactness. Solution Way: different combinations for the selected systems and reduce water dispersion system, select a suitable plastic coagulant, and to determine the appropriate dosage. 2 equipment in the digestion and absorption of imported equipment, based on the completion of the equipment improvement, intensification and the like. Focus on resolving the pulse injection, guarantee ejected from the gun mouth "material note" uniform and stable. The solution is to improve the structure of the compressed air into the feed gas while adjusting the appropriate ratio. Environmental protection lime kiln, blue sky kilns, lime kilns by LUOZHUANG Kiln Ltd. Linyi City blue sky. Luozhuang District, Linyi City, blue sky Kiln Ltd. (www.lyshihuiyao.com) (www.lyshihuiyao.com) Shandong Linyi, refining and processing leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Kiln leadership in the blue sky with the staff warmly welcome all inquiries negotiations to create a better future for the kiln blue sky.