| 摘要 |
PROBLEM TO BE SOLVED: To provide a means capable of stably executing melting of scrap, etc., by improving the corrosion resistance of a corrosive brick for the hearth of a direct current electric furnace. SOLUTION: This means is attained by using a spinel carbonaceous brick for the hearth of the direct current electric furnace consisting of an aggregate consisting of Al2O3-MgO based spinel, magnesia and alumina and in which the weight ratio of respective components are (Al2O3-MgO based spinel >= magnesia) and (Al2O3-MgO based spinel >= alumina) and 5-25 wt.% carbon per the sum of the aggregate and the carbon and moreover containing a binder. |
