MOLD FLUX FOR CASTING NON-ORIENTED ELECTRICAL STEEL SHEET WITH HIGH AL CONTENT AND METHOD FOR PRODUCING NON-ORIENTED ELECTRICAL STEEL SHEET USING THE SAME

摘要

PURPOSE: A mold flux for non-oriented electrical steel sheet casting is provided to prevent slag composition from being moved to high melting point domain by maintaining low salt degree and to maintain continuous lubrication capability by lowering melting point and viscosity of original powder. CONSTITUTION: A mold flux for non-oriented electrical steel sheet casting comprises 15-25 parts by weight of CaO, 30-45 parts by weight about the whole composition 100.0, the SiO2 30-45 parts by weight, 13-18 parts by weight of Na2O and 10-12 parts by weight of F based on 100 parts by weight of whole composition. The basicity of the mold flux is 0.5-0.6, and the viscosity at 1300 deg. Celsius is 1.4-1.5poise. The melting point of the mold flux is 900 deg. Celsius or less. The weight ratio of Na2O to CaO is 0.6-0.9. The mold flux additionally includes one or greater selected from a group consisting of MgO, Li2O, B2O3 and activated carbon. An electrical steel sheet comprises 2-4 parts by weight of silicone and 1 part by weight of aluminum (phase I). [Reference numerals] (AA) Molten; (BB) Dipping nozzle; (CC) Molten; (DD) Coagulation