Long Campaign Design of Nanjing Steel BF and Management Experience
One generation campaign of Nanjing Steel No.1 and No.2 BF extends 14.2 and 15.6 years respectively,and No.3 BF operates for 13 years up to now,demonstrating that all of them have long campaign life.In the design of these three fur-naces,ceramic cups are adopted which are inserted in the tuyere composite bricks and cannot expand freely underneath the tuyere composite bricks;Based on the experience of No.1 and No.2 BF,combined close loop soft water circulation cooling system is employed in No.3 BF employs,and the fixing of the cooling stavesis improved,fundamentally solving the problem of water pipe leakage of the cooling stave caused by the shearing effect of the furnace shell.In the daily production manage-ment,some effective actions are taken,such as strict quality control of the raw materials and fuel,optimization of the operat-ing system,adoption of well-proved furnace protection technologies,set up of the intelligent monitoring and early warning system,maintaining of stable and appropriate gas flow distribution,and activation of hearth;these efforts provide important guarantee for the furnace long campaign.
blast furnacehearth designcooling stave fixationfurnace protection technologyearly warning system
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