The invention discloses a method for controlling cleanliness of
molten steel, and a
smelting control method capable of preventing a
molten steel gap from nodulation during sulphur and aluminum contained steel pouring, and belongs to the field of
smelting. The method for controlling cleanliness of the
molten steel comprises the following steps that
blast furnace molten iron without desulfuration issubjected to converter
smelting, and during converter tapping,
deoxygenation, alloying and tapping wash heat are carried out in sequence for carrying out inclusion removal treatment. Through an LF furnace, converter tapping is subjected to refining under the condition that acid soluble aluminum is not adjusted, that is, during tapping, a slagging constituent is added for controlling refining slagcomposition, and after the
slag is dissolved,
deoxygenation is carried out through a deoxidizing agent. Through the process, the content of sulphur in the molten steel is monitored,
ferrous sulfide is used for adjusting the content of sulphur in the molten steel to the first target value, an RH furnace is used for refining LF furnace tapping, in the process, according to the content of the acid soluble aluminum of LF furnace tapping, selective aluminum feeding is carried out to adjust the content of the aluminum to the second target value, and after RH furnace refining is finished,
calcium treatment is carried out. According to the process, the cleanliness of the molten steel can be improved, the nodulation problem during molten steel pouring can be avoided, and the stopper bar curve rising can be controlled.