| 摘要 |
PURPOSE:To contrive improvement in resistance to erosion with basic slag and corrosion resistance at high temperatures, by constituting brick of Al2O3 and MgO in a specific proportion and containing a refractory raw material of specific structure and graphite in MgO unit crystals. CONSTITUTION:This refractory brick for refining molten metal contains 97-60 pts.wt. electrofused MgO.MgAl2O4 based refractory material, consisting of 10-50wt.% Al2O3 and 90-50wt.% MgO and having a structure of MgO unit crystals wrapped in MgAl2O4 and 3-40pts.wt. graphite. For example, a homogeneous mixture of 20wt.% Al2O3 with 80wt.% MgO is melted at a specific temperature and allowed to cool to provide an electrofused MgO.MgAl2O4 and a raw material (A). Natural scaly graphite of 98% purity in an amount of 20pts. wt. and 80pts.wt. raw material (A) are used to produce the aimed refractory brick. |
