| 摘要 |
A hearth (10) for a metallurgical reactor, in particular for a blast furnace, has an outer shell (12) and an annular wall lining (16; 216; 316) of refractory material inside the shell. The wall lining has a lower region with a multi-layered construction. A radially inner layer (20) faces the interior of the hearth and includes at least one inner ring (24) of refractory elements. A radially outer layer (22) faces the outer shell and has at least one outer ring (26) of refractory elements. In the at least one inner ring (24) elements (21; 221; 321, 321') are made of a first carbonaceous refractory material that is different from one or more carbonaceous refractory materials of the elements (22) in the outer layer. According to the invention, the first refractory material contains, in a proportion of at least 5% by mass in total, at least one property-enhancing additive other than metallic silicon or silicon carbide. In beneficial combination therewith, the at least one inner ring (24) has a wall thickness (d) of less than 45%, preferably of less than 35%, of the corresponding total wall thickness (D) of the wall lining(16; 216; 316). |
