Method for improving purity of molten steel in argon station
A technology of purity and molten steel, applied in the field of converter smelting, which can solve the problems of waste, increasing the cost per ton of steel, and prolonging the production cycle.
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[0012] The steps that the present invention takes are as follows:
[0013] (1) Add 30-60Kg of lime, 20-40Kg of calcium carbide, and 130-160Kg of pre-melted refining slag into the ladle before blowing argon. The total diameter of the molten steel open hole shall be controlled within 400-600mm;
[0014] (2) Add aluminum wire into the ladle after blowing argon for 1 to 3 minutes;
[0015] (3) After accumulatively blowing argon for 6 minutes, reduce the amount of argon to carry out soft argon blowing. The soft argon blowing standard is based on the total diameter of the molten steel open hole being controlled at 200-400 mm, and the soft argon blowing time must be guaranteed to be ≥ 6 minutes;
[0016] (4) The total argon blowing time of the molten steel in the argon station is ≥12 minutes. When the temperature meets the liquidus temperature +50-60°C, the argon gas is turned off, and then the alkaline covering agent and carbonized rice husk are added to the ladle.
[0017] The pr...
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