| 摘要 |
<p>PURPOSE:To change a composition of slag generated at the time of pre-treating into composition which can be used as the rapid solidificating raw material by adding the raw material of CaO series, Al2O3 series, etc., in the process of pre-treatment for molten steel or molten iron. CONSTITUTION:One or more kinds of lime, lime stone, iron oxide, fluorite, Al, aluminum dross, alumina series waste material, bauxite, aluminum hydroxide are mixed with top-charge or injection into the molten steel during refining or the molten iron in pre-treating process. By adding these raw material, the sensible heat is effectively utilized and the slag composition is adjusted to 35-45wt.% CaO, 25-35% Al2O3 and the essential component of solidified slag is made to 12CaO.7Al2O3 or 11CaO.7Al2O3 CaF. By this method, the slag having disintegrativity is effectively utilized and can be used to the raw material for rapid solidificating material having high added value.</p> |
