With desulphurizing treatment on low titanium blast furnace slag by blowing CO

2

method

the rate of removing sulfur from low titanium blast furnace slag is 66.59% ~78.01 % and the residual sulfur content in blast furnace slag is 0.137% ~0.283%

therefore the sulfur content in prepared low sulfur and low titanium blast furnace basically meets the requirements of LF refining slag for steel HRB400E. By using low sulfur and low titanium blast furnace slag the ingredient of end slag of LF refining is /% : 37.40 ~46.50 CaO

12.30 ~15.10

MgO

21.70〜26.70 SiO

2

5.74~17.00 Ag

2.44~3.39 TiO

2

0.36~1.42 MnO

0.75~1.62 Fe

2

O

3

and 0.200〜0.597 S

the desulphurized rate of liquid is 10.0% ~41.5%

and the end [S

]

of steel HRB400E is 0.008% ~0.029%

it is about equal to the effect of desulphurization by using present process refining slag-ladle slag and drained hot slag ( LF refining end slag ingredient /% : 34.30 〜42.90 CaO

13.60 〜18.10 MgO

24.00 〜26.50 SiO

2，

4.88 -11.00 A1

2

O

3

0.71 ~1.12 TiO

2

0.47~1.47 MnO

0.81~1.72 Fe

2

O

3

0.245〜1.132 S； end [S

]

of steel HRB400E 0.027% ~0.032% ).