Advantages and the Application of Fluctuation-free Hot Blast Stove Changeover Technology
The advantages and application result of fluctuation-free hot blast stove change-over technology are described.The technology is a solution to the shortcoming of the conventional stove changeover process,where a separate blasting system is installed with the blast supplied via the air compressor to pressurize the stove.It not only will not lead to the blast pressure fluctuation,instead,it can prevent the blast from back flowing through the tuyere.Additionally,this technology enables au-tomatic changeover of the stoves,increase of blast temperature and pig iron output,and cut of the investment.Its application can shorten the stove changeover time(from 18min to 5min in Jianlong Steel 1 800m3 BF,for example),and increase the blast temperature(from 1 170℃ to 1210℃ also in Jianlong Steel 1 800m3 BF).The investment for such a modification a-mounts to RMB 3,500,000 and the payback period is only 4 months.
blast furnacehot blast stovepressurizingblast pressure fluctuationstove changeover time
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