Long Campaign Technology Features of Shagang 2680 m3 BF and the Application Result of Copper Cooling Stave
Shagang 2680 m3 blast furnace is designed and operated under the concept that the expansion and contraction of the charge should adapt to the designed furnace profile.The copper cooling staves achieve long service life thanks to rational fur-nace profile design,and optimization of the copper cooling stave and operating system.The technological features include:reasonable volumetric ratio(12％-16％)of the furnace belly;optimized upper part structure of the stack,thinner cast iron cooling stave,and thicker refractory material,which weaken the cooling intensity of the upper part of the stack,and prevent the edge gas from becoming so cold that affecting the drying and preheating of the charge;optimized design of the copper cooling stave with lateral stave ledge adopted,which enhances the uniform circumferential heat transfer of the furnace;opti-mized operating system and rational conditioning of the burden distribution and blasting system,which enlarge the proportion of the hearth active area,and prevent over-low location of cohesive zone root.Contributed by the above measures,the serv-ice life of the furnace copper cooling staves lasts over 17 years mostly,and even reach 23 years for some staves.
blast furnacecopper cooling stavefurnace profile designcooling stave ledgeoperating system
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