| 摘要 |
PURPOSE: A process for preparing a tundish flux by controlling the pouring condition of supplementary raw material in the refining process of Si deoxidized steel is provided, which can substitute conventional dundish flux(artificial slag) and enhance the index of cleanliness of steel as compared to conventional tundish flux. CONSTITUTION: In the process for manufacture of a tire steel cord comprising by weight, C:0.70 to 0.80%, Si:0.20 to 0.30%, Mn:0.70 to 0.90%, P:0.011% or less, S:0.005% and Al:0.002% or less, this process comprises the steps of: obtaining slag comprising 3 to 8kg limestone, 3 to 10kg silica and 1 to 3kg fluospar by Si deoxidizing when molten steel in a converter is tapped with a ladle and refining in the second stage; pouring molten steel in the ladle into a tundish, cooling the remaining slag; and grinding to a size of 30mm or less.
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