Aiming at the problems such as difficult melting of slag and low dephosphorization rate at the early stage of steelmaking high carbon steel in 100 t BOF （ basic oxygen furnace） with titanium-bearing hot metal

the slagging process and the slag physical characters of BOF steelmaking with titanium-bearing hot metal are analyzed

the technology of heel slag + single slag is developed

:

e. The terminal slag is recycled to use

to full play the character of high FeO content of 10% 〜13% FeO in the terminal slag

the CaO-TiO

2

-SiO

2

ternaiy slag system in the early stage of steelmaking of titanium-bearing hot metal is rapidly converted into the Ca0-TiO

2

-SiO

2

-FeO quaternary slag system

so that most of phosphorus in steel is removed. The basicity of terminal slag is controlled to be mo

re than 3. 2

the TiO

2

content in terminal slag is controlled to be less than 5%

the BOF tapping [C

]

≥0.20% and tapping [P

]

≤0.014% 

the dephosphorization rate of steelmaking in BOF reaches to 88% 〜92%

and the consumption of lime decreases to 28 kg per ton of steel.