Patent ID: 9587882
Date: 2017-03-07
CPC Classifications: C21B,C21C,F27B,F27D

Claim:
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: 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.