| 摘要 |
PURPOSE: A mold flux for manufacturing high carbon steel is provided to improve a slab surface quality by appropriately controlling an inflow and by up-regulating a viscosity and a melting point and by enlarging amount of an exothermic material(Fe_2O_3). CONSTITUTION: A mold flux for manufacturing high carbon steel comprises CaO 25 to 40 parts by weight, SiO_2 26 to 40 parts by weight, MgO 1 to 5 parts by weight, Al_2O_3 4 to 9 parts by weight, Na 2O_9 to 16 parts by weight, Fe 2O_3 1 to 12 parts by weight, Li 2O_1 to 5 parts by weight, F 7 to 15 parts by weight, and free carbon 3 to 5 parts by weight about gross composition 100 by weight. A basicity(CaO/SiO_2) is 0.8 to 1.0. A melting point is 900 to 1000 deg. C. A viscosity is 0.16 to 0.35 poise(1300 deg. C). [Reference numerals] (AA) Example 1; (BB) Comparative example 1 |
