ISSN 2594-5327
72nd ABM Annual Congress — vol. 72, num.72 (2017)
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One of the main difficulties in the operation of trough and runners at Arcelor Mittal Tubarão (AMT) Blast-furnace no.02 is the reduced amount of time available for repair procedures. The consequence is that the castable installation must often be performed during hot conditions and the installed castable could easily detach from the base material during the early stage of operation, exposing the previously oxidized base material to molten iron and corrosive slag attack. When events like this happen, emergency repairs must be executed, resulting in increased refractory unit consumption and an unplanned shutdown of unit operation. Considering these targets, Nippon Crucible Co. and Saint-Gobain HPR Brazil have developed a high-performance Al2O3-SiC-C composition based on an entirely novel anti-oxidation technology. Oxidizing reactions could be attenuated by adding an oxidant inhibitor and a water reducing agent. As a result, the open porosity was significantly reduced, resulting in an improvement of campaign life in terms of pig iron throughput when compared with the regular castable. An analysis of this life improvement showed successful results for the material after 250 days of campaign. The main reason for such successful results was that the deterioration caused by the oxidation was significantly less and that this change made on the high cohesive structure of the base material was maintained for a long time. The attained results allowed Arcelor Mittal Tubarão to achieve longer trough campaigns, and avoid any unplanned stoppages with zero breakdown risks.
Palavras-chave
Anti-oxidant, Trough and runners, Refractory castable
Anti-oxidant, Trough and runners, Refractory castable
Como citar
Sako, Eric Yoshimitsu;
Alves, Wiliam;
Rangel, Bruno Gonçalves;
Januário, Nilton Fernando dos Santos;
Galesi, Douglas Fernando;
Costa, Cláudio Cesar da;
Ruy, Douglas;
Fujiwara, Hiroshi.
NEW ANTI-OXIDATION TECHNOLOGY FOR TROUGH AND RUNNERS CASTABLES: A SUCCESSFUL SOLUTION AT ARCELOR MITTAL TUBARÃO BLAST-FURNACE #02
,
p. 2025-2033.
In: 72nd ABM Annual Congress,
São Paulo,
2017.
ISSN: 2594-5327
, DOI 10.5151/1516-392X-30601
