With the thermal compensation technology including using CO secondary burning

3.5% ~5.0% Si high carbon ferrochromium and alloys baking

the reduced product SiO

decreases by 800 kg to increase the deoxidation ability of silicon； with controlling AOD slag basicity 2.3~2.4 and carried out secondary reduction in AOD refining

and adding 5 kg/t active lime in LF refining process

the efficiency of deoxidation and desulphurization increases by more than 30% ； and with ( CaO)/( SiO

2

)= 2.2 of CaO-SiO

2

-MgO slag series controlling adding amount of fluorite amounting to 13%~17% of the total lime to get better slag viscosity and be available to slagging and absorbing inclusions

the total oxygen content in Φ5.5 mm wire rod decreases to

30 x 10

-6

~ 40 x 10

-6

from 60 x 10

-6

~ 90 x 10

-6

before optimization and the S content decreases to 0.003% ~0.007% from original 0.005% ~ 0.010% .