The magnetic properties of non-oriented electrical steels are closely related to the cleanliness level. In order to achieve reasonable control of oxygen in non-oriented electrical steel smelting process

the change of carbon and oxygen content were analyzed

the critical carbon content at the end-point of BOF and α

FeO

in slag were also calculated. The results show that with the decrease of end-point carbon content

the end-point oxygen content increases and fluctuates widely. The ideal carbon content in tapping should be controlled at 0. 03% ~0. 05%. It is required that the content of T. Fe in slag should be ≤ 24% and the end-point carbon content should be higher than 0.031%. Ladle botton argon blowing can effectively reduce excess oxygen and decrease carbon-oxygen product in molten steel. According to production data

the ideal carbon and oxygen content should

be controlled at 0.025% ~0. 035% and 500 X 10

-6

~650 X 10

-6

before RH refining

and the end-point carbon content of BOF should be controlled at 0.03% ~0.04%.