Increasing Production and Benefit in Jingtang Steel No.3 BF amid Raw Material and Fuel Quality Deterioration
The efforts to increasing production and benefit in Jingtang Steel No.3 BF amid raw material and fuel quality dete-rioration are introduced.In July 2021,the furnace condition is not stable as before,the water temperature difference of fur-nace wall varies greatly,and the hot metal[Si]content slopes down for the reasons of the shortage of coking coal and Peruvi-an fine ore for pelletizing,and deterioration of raw material and fuel quality.As a response,the attempts of improving the quality of raw material and fuel,optimizing the charging system and the blasting system,stabilizing the hot metal[Si]con-tent,and strengthening the management of tapping are practiced.All these efforts,especially the charging system strategy of"Smoothening the central gas flow,and stabilizing both the center and edge gas flow",make the furnace running more and more stable,and the daily output steps up gradually.In April 2022,the coke rate and the fuel rate of the furnace drop to 283.9kg/t and494.8kg/t respectively,and the daily output reaches 12,963t/d.In May,the coke load falls to 6.01 and the productivity hits over 2.40t/(m3·d).
super-large blast furnacefurnace conditionraw material and fuel qualityoperating systemdaily output
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