SIMULTANEOUS DEOXIDIZING AND DESULFURIZING AGENT FOR MOLTEN STEEL AND SIMULTANEOUSLY DEOXIDIZING AND DESULFURIZING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a simple Mg additional technique in a low cost by utilizing single metallic Mg as a blending component without using Mg executing alloy treatment. ;SOLUTION: A simultaneous deoxidizing and desulfurizing agent for molten steel satisfying the following relations in the composition of blending 5-25wt.% metallic Mg and the balance CaO and the other component, is provided. Metallic Mg (%)+CaO (%)+CaF₂ (%)+MgO (%) ≥90. 0≤CaF₂ (%)+MgO (%)≤30, 0≤MgO (%)1.5 × metallic Mg(%). Then, a material having wire-shape by coating iron on this simultaneous deoxidizing and desulfurizing agent is added into the molten steel at 0.2-0.8kg/t of molten steel/min supplying speed under conversing into the pure Mg supplying speed.;COPYRIGHT: (C)1997,JPO