ＣａＯ・Ａｌ２Ｏ３及びＮｉＯ・Ａｌ２Ｏ３焼結体への溶鉄中Ｃｕ，Ｓｎの選択浸透

Removal of surface active elements in molten iron, such as copper and tin, is tried by the use of the penetration phenomena. Iron-copper(or tin) alloy is put by contact with complex oxide, CaO·Al2O3 or NiO·Al2O3, which have good wettability with molten iron, at 1823K. Copper is removed from molten iron including sulfur when CaO·Al2O3 is made to contact the molten iron. The sulfur is effective for copper removal by this method. When the sulfur content is adjusted in the range from 0.05 to 0.5 mass, the removal ratio of 14 is attained. In the case of NiO·Al2O3, the copper can be removed even for Fe-Cu metal which contains no sulfur, and the maximum copper removal ratio of 20 is attained. The tin removal ratio increases with the increase of sulfur content for both cases that CaO·Al2O3 and NiO·Al2O3 are used and increases from 2 to 37 for CaO·Al2O3 and from 28 to 53 for NiO·Al2O3. In this work, it is found that both copper and tin in molten iron can be removed by contact with CaO·Al2O3 or NiO·Al2O3.