With using the process measures including increasing the return ratio and miniaturizing the burden

con¬trolling the start-blowing oxygen temperature

heating rate and end-point temperature

modifying the high melting point and low basicity slag series to high basicity of CaO/ SiO

2

1.4 ~2.5 and low melting point 45.6 ~ 53.6 CaO-21.6 ~ 32.0 SiO

2

- 3 ~ 13 Cr

2

O

3

-5 - 10 MgO-5 ~ 10 Al

2

O

3

-0 ~5 CaF

2

slag series

and reasonable power supply system the tap to tap time of stainless steel is shortened by 30 minutes per heat

the power consumption is reduced by 75 kWh/t

the electrode consumption is reduced by 1. 89 kg/t

the furnace life is increased by 64 heats

and the content of Cr

2

O

3

in slag is reduced to 6% 〜 12%