Based on production data and practice of 30 t VOD unit at the second steelmaking plant

FuSteel

the - effect of initial liquid temperature on yield of chromium

oxygen utilization ratio and oxygen consumption during VOD refining process is analyzed. Results show that in condition of VOD oxygen browning

with increasing initial liquid temperature

it is available to increase Cr yield and decrease oxygen consumption ；in order to obtain better refining effect as the requirement of carbon content in stainless steel is respectively ≤0. 30%

≤0. 03% and ≤0. 01%

the temperature of liquid before VOD refining should be respectively ≥1 600 °C

1 650°C and 1 670 °C ； in order to decrease accident of splashing and overflowing

the initial temperature of liquid should be ≥l 580 °C

and to reduce consumption of refractory the initial temperature of liquid should be ≤1 720 °C.