The invention relates to the technical field of
metallurgy, and particularly discloses a production method for
smelting low-
phosphorus steel from
vanadium-containing molten iron. The production methodcomprises the following steps of carrying out desulfurization pretreatment on the
vanadium-containing molten iron; feeding the desulfurized
vanadium-containing molten iron into a dephosphorizing converter, adding a
calcium dephosphorizing agent for dephosphorizing, and pouring out
slag; carrying out coarse
oxygen vanadium extraction on the dephosphorized vanadium-containing molten iron; and feeding semisteel into the dephosphorizing converter after deslagging for
decarburization treatment, and conducting steel tapping. In the steel tapping process, small-particle
lime and low-
silicon refiningslag are added along with deoxidized
alloy materials, and
slag is reserved after steel tapping. According to the production method provided by the invention, desulfurization pretreatment is firstly carried out, then the
alkalinity and oxidability of the
slag are adjusted by utilizing the
calcium dephosphorizing agent, the fluidity of the slag is improved,
phosphorus is converted into 3CaO.P2O5 or4CaO.P2O5, the dephosphorizing efficiency is improved, vanadium extraction and
decarburization are carried out after dephosphorizing, the grade of vanadium slag can be improved, residual vanadium inthe semisteel is reduced, the difficulty of
smelting the low-
phosphorus steel from the vanadium-containing molten iron is greatly reduced, and the low-phosphorus steel of which P is less than or equalto 0.005% is obtained.