| 摘要 |
<p>PURPOSE:To obtain stably a high cleanliness steel with a small amount of a flux in a short time by providing a specified composition consisting of CaO, CaF2, MgO, Al2O3 and SiO2 to the flux. CONSTITUTION:The composition of a flux for refining molten steel is composed of, by weight, >30% CaO, 10-40% CaF2, 3-15% MgO, 1-20% Al2O3, 5-15% SiO2 and the balance Fe with inevitable impurities. It is desirable that the grain size of the flux is made large so as to prevent the formation of dust during use, but the flux floats up rapidly and produces a slight effect of reaction when the grain size is <=2mm., so the grain size is regulated to <2mm..</p> |
