Abstract: The enrichment by circulating of alkali metal in BF (blast furnace) smelting with vanadic titanomagnetite is analyzed.The effect of alkali metal on burden properties and BF smelting is researched,the potential hazard of alkali metal is discussed and the control measures are put forward.It is concluded that the alkaline loads of BF in PZH Steel is high,while the slag bearing TiO₂ has high capacity of alkalis discharge,so the alkaline hazard is not come up yet.The coke quality is worsening in recent years since the attack of alkalis,it should be pay attention.Through reasonable proportioning of mixed coal and passivating treatment of coke,the CRI,CSR and the alkaline corrosion resistance of coke could be improved.