Practices on Blowing Out and Discharging Residual Liquid Iron for 7#Blast Furnace of Baotou Steel
The old horse of 7#blast furnace of Baotou Steel is deeper.In order to shorten the project duration and re-duce workload of removing residual slag iron in furnace hearth after blowing out,the mode of dropping stockline and dis-charging residual liquid iron is adopted.It is one of the most important links in blowing out operation of blast furnace to dis-charge residual liquid iron and its effect directly affects the clearance time of furnace hearth.In the paper,the process of discharging residual liquid iron for 7#blast furnace of Baotou Steel during blowing out is mainly introduced.The previous preparation work mainly includes such as activating furnace hearth,confirming position of residual liquid iron notch,calcu-lating amount of residual liquid iron and making residual liquid iron runner.The cutting of shell of blast furnace and cooling stave,manufacture of mud sleeve for residual liquid iron notch as well as the whole process of discharging residual liquid iron after blowing out are introduced in detail.The process of discharging residual liquid iron of 7#blast furnace is safe and ordered.After blowing out,it is found that there is basically no residual iron in the furnace hearth when cleaning it,which indicates that the effect of discharging residual liquid iron this time is good and experiences are gathered for discharging re-sidual liquid iron in future heavy and medium repairs of blast furnace.
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