| 摘要 |
PURPOSE:To manufacture a desulfurizing and deoxidizing agent having a low m.p. by adding specified amounts of MgO, SiO2 and AlF3 to a composition contg. specified percentages of CaO, Al2O3 and CaF2 as principal components and by sintering them. CONSTITUTION:To a composition contg., by weight, 40-70% CaO, 10-30% Al2O3 and 10-30% CaF2 as principal components basing on the amount of sintered crystals are added 0.5-5% MgO, 0.5-5% SiO2 and 1-5% AlF3 in the form of dolomite, microsilica and industrial aluminum fluoride. The mixed starting materials are sintered at 1,000-1,300 deg.C to obtain a flux for refining molten iron. It is preferable that the ratio of CaO/Al2O3 is 1-4. The resulting desulfurizing and deoxidizing agent has a low m.p. and high meltability comparable to that of a commercially available electromeltable desulfurizing agent, so the cost of electric power or fuel can be saved. |
