Effect of ending ladle treatment pattern on operation of"one ladle technology"
In order to study the influence of ending ladle treatment pattern on the operation of"one ladle technolo-gy",the causes for ending ladle emergence were explained,and relevant process indexes such as ending ladle rate,transition rate,and transition time were defined.On this basis,taking the ironmaking-steelmaking interface in Shougang Jingtang as an example,technical indexes of ending ladles and non-ending ladles were statistical compared,such as processing time and desulfurizer consumption of hot metal pretreatment,heating agent consumption and tap-to-tap time of BOF smelting.The optimization scheme of ending ladle treatment pattern was introduced,and the op-eration time indexes of ending ladles,non-ending ladles,and all the ladles before and after the implementation of the scheme were statistically analyzed,as well as the incoming hot metal temperature of hot metal desulfurization sta-tion.The results showed that after the implementation of the optimization scheme,the transition rate of the ending ladles increased by 17.82 percentage points,the median transition time decreased by 26 min,the median total hot metal receiving time decreased by 30 min,and the median turnover cycle decreased by 12 min.This greatly shortened the operation time of the ending ladles and was conducive to reducing the hot metal temperature drop during the op-eration of the ending ladles.Before and after the implementation of the optimization scheme,the median hot metal temperatures of the non-ending ladles entering the desulfurization station were 1 414 ℃ and 1 416 ℃ respectively,which were basically unaffected,and the median hot metal temperatures of the ending ladles were 1 375 ℃ and 1 380 ℃ respectively,showing a significant increase.
BF-BOF interfaceending ladleone ladle processinterface technologyhot metal temperature drop
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