| 摘要 |
A hearth for a metallurgical reactor, in particular for a blast furnace, has an outer shell and an annular wall lining of refractory material inside the shell, the wall lining having a lower region with a multi-layered construction, a radially inner layer faces the interior of the hearth and includes at least one inner ring of refractory elements, radially outer layer faces the outer shell and has at least one outer ring of refractory elements, where in the at least one inner ring elements are made of a first carbonaceous refractory material that is different from one or more carbonaceous refractory materials of the elements in the outer layer such that, 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 has a wall thickness of less than 45%, of the corresponding total wall thickness of the wall lining. |
| 主权项 |
1. A hearth for a metallurgical reactor, said hearth comprising:
an outer shell and an annular wall lining having a height that is arranged inside said shell and made of refractory material for containing a bath including molten metal; said wall lining having a lower region comprising:
a radially inner layer facing the interior of said hearth and comprising a plurality of inner rings of refractory elements, said inner rings having outer faces disposed away from the interior of said hearth, said outer faces aligned in a vertical direction with one another;a radially outer layer facing said outer shell and comprising a plurality of outer rings of refractory elements, said outer rings having inner faces disposed away from said outer shell, said inner faces aligned in a vertical direction with one another and opposing and spaced from the outer faces of said inner rings to define a continuous, substantially vertical, cylindrical, intermediate gap between them;at least one of said inner rings comprising elements made of a first carbonaceous refractory material different from one or more carbonaceous refractory materials of which said elements of said outer layer are made; wherein said first refractory material contains, in a proportion of at least 5% by mass in total, at least one additive other than metallic silicon or silicon carbide, and wherein said at least one inner ring has a wall thickness of less than 45%, of the total wall thickness along the height of said wall lining, and wherein at least one inner ring comprises elements having an anchoring portion on their outer faces and at least one outer ring comprises elements having an anchoring portion on their inner faces, each pair of anchoring portions cooperating for securing an element of said inner ring against dislocation in a radially inward direction and a circumferential direction with respect to a corresponding element of said outer ring, and wherein said first refractory material contains 50-85% by mass of carbon and, as an additional additive, 5-20% by mass in total of at least one material selected from the group consisting of metallic titanium, titanium carbide, titanium nitride, titanium carbonitride, and titanium oxide. |
