The invention discloses a process of quickly regulating
alkalinity of LF
slag. The process comprises a molten iron desulfurization pretreatment and converter
smelting process and an LF refining
smelting process, wherein the molten iron desulfurization pretreatment and converter
smelting process comprises the following steps: 1) end point operation, 2)
slag stopping operation and 3) implementation of a
system for tapping, deoxidizing and slagging; the LF refining
smelting process comprises the following steps: 1) LF early-stage operation: adding a first batch of deoxidizing and slagging material; 2) implementation of an LF middle-stage
deoxidization and desulfuration process: adding a second batch of deoxidizing and slagging material, alloying according to components of a steel grade; if the
sulfur content of a second sample meets the component requirements of the steel grade, feed aluminum wires; if the components of the second sample fail to meet the component requirements of the steel grade, adding a third batch of deoxidizing and slagging material until the requirements are met, and then feeding the aluminum wires to supplement the aluminum content in the
molten steel; 3) LF middle-later stage quick
alkalinity regulation: at the end of feeding of the aluminum wires to supplement the aluminum content in the
molten steel, adding an
alkalinity regulator to optimize a
slag system and ending the process. According to the process of quickly regulating the alkalinity of top slag of an LF steel
ladle in stages, the requirements for refining furnace
molten steel desulfuration and the
impurity removal are both met to achieve the molten steel refining effects, so that the
internal quality of
continuous casting is improved.