Causes of the Abnormality of Kunming Steel No.2 BF and Handling Measures
The causes and handling measures for the abnormal furnace condition occurred on April 8,2023 in Kunming Steel No.2 BF are analyzed and summarized.The abnormity is believed directly causing by long-term water leakage of the tuyere nose and furnace wall accretion,and indirectly by long interval of BF scheduled maintenance cycle,deterioration of the met-allurgical performance of the sinter,slag phase fluctuation due to fluctuated flux quality,and poor top sprinkling effect.The targeted actions are made in charging system,blasting system,slagging system,heat system,etc.,such as reducing the stock batch weight and the load,carrying out central coke charging,adjusting the distribution matrix,increasing the water a-mount and enhancing the cooling intensity,etc..The above actions make the furnace condition rapidly recovered.On April 12,the coke load of the furnace rises to 4.54,the daily output reaches 7 058.789 t/d,and the fuel rate stabilizes at 516kg/t.
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