| 摘要 |
A process for producing a low P chromium-containing steel in an AOD vessel from a high P chromium-containing molten pig iron comprising a first stage of recarburization, desiliconization and temperature raising, a second stage of dephosphorization with slag, which may be repeated, and a third stage of conventional refining. At the end of the first stage the bath has a carbon content of not less than 4.5% and a temperature of 1500-1700 DEG C, whilst during the first and second stages the bath is agitated by bottom-blowing with a non-oxidising gas. The desulphurising flux may contain 30-80 wt% of alkaline earth halide, 0.4-30 wt% of lithium oxide/carbonate, 5-50 wt% of iron/nickel oxide, and 0-40 wt % of alkaline earth metal oxide/carbonate. |
