PRODUCTION PRACTICE OF HIGH GRADE AUTOMOTIVE SHEET STEEL
The decarbonization rate can be improved by blowing oxygen as early as possibl,then controlling the appropriate forced decarbonization mode of oxygen blowing and flow rate.The fastest decarbonization rate reaches 0.343 min-1.In production,the oxygen content of molten steel entering the station is controlled between 0.025％and 0.045％,and the final oxygen content of decarburization is controlled between 0.025％and 0.035％,which will not affect the quality of molten steel and improve the decarburization efficiency.Adopting appropriate top-slag modification method can well control the content of w(FetO)in slag,so as to reduce the secondary pollution of molten steel.Controlling the temperature rise oxygen content not more than 120 m3 with the standing time between 25～35 min has little effect on the purity of molten steel.
IF steelRH refiningAutomobile plateTop-slag modification
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