ANÁLISE DE DESGASTE DE REFRATÁRIOS PARA CONVERTEDOR
EVALUATION OF WEAR OF REFRACTORIES FOR BOF
Quintela, Marco Antonio; Pessoa, Celso Anízio; Salgado, Afonso Pereira
http://dx.doi.org/10.4322/tmm.00601007
Tecnol. Metal. Mater. Min., vol.6, n1, p.36-40, 2009
Resumo
São apresentados e discutidos os principais mecanismos de desgaste de refratários de MgO-C para convertedor, determinados por meio de estudo post-mortem, considerando-se as variáveis de processos na Usiminas. Os resultados dos testes laboratoriais indicaram que o desgaste desses tijolos decorre de uma combinação de fenômenos de natureza física e química, tais como aqueles que levam à propagação de trincas, oxidação do carbono seguida de penetração de escória, erosão de camadas superficiais do revestimento e corrosão por escória.
Palavras-chave
Mecanismo de desgaste, Refratários, BOF
Abstract
The current results of laboratory tests used for evaluating the wear mechanisms of magnesia-carbon bricks for BOF are presented and discussed. The laboratory evaluations indicated that the wear of magnesia-carbon bricks for BOF at Usiminas derived from an association of phenomena such as that lead to crack propagation, carbon oxidation, erosion and corrosion.
Keywords
Mechanisms of bricks, Refractory, BOF.
Referências
1 ASANO, K. Recent trends in refractory technologies for BOFs in Japan. Interceram, v. 48, p. 6-12, May 2004.
2 QUINTELA, M. A.; PESSOA, C. A.; KOKKE, M. M. Caracterização de tijolos de MgO-C para convertedor. In: SEMINÁRIO DE ACIARIA - INTERNACIONAL, 38., 2007, Belo Horizonte, MG. Anais ... São Paulo: ABM, 2007. 1 CD.
3 SURUGA, T.; HATAE, E.; HOKII, T.; ASANO, K. Spalling resistance and physical behavior of MgO-C refractories at high temperature. Journal of the Technical Association of Refractories, v. 25, n. 2, p. 128-31, June 2005.
4 YAMAGUCHI, A.; KUN, Y. J. Formation and expansion of open pore in carbon-containing refractories and their prevention. Taikabutsu Overseas, v. 14, n. 1, p. 20-5, Mar. 1994.
5 ZHANG, S.; MARRIOTT, N. J.; LEE, W. E. Thermochemistry and microstructure of MgO-C refractories containing various antioxidants. Journal of the European Ceramic Society, v. 21, n. 8, p. 1037-47, Aug. 2001.
6 YAMAGUCHI, A. Thermochemical analysis for reaction processes of aluminium and aluminium-compounds in carboncontaining refractories. Taikabutsu Overseas, v. 7, n. 2, p. 11-6, June 1987.
7 ZHANG, S.; MARRIOTT, N. J.; LEE, W. E. Influence of additives on corrosion resistance and corroded microstructures of MgO-C refractories. Journal of the European Ceramic Society, v. 21, n. 13, p. 2393-405, Nov. 2001.
8 POIRIER J.; BOUCHETOU, M.L. Influence of iron oxides on corrosion of refractories used in steel making. Refractories Applications Transaction, v. 2, n. 3, p. 2-8, Nov.-Dec. 2006.
9 YAMAGUCHI, A. Control of oxidation-reduction in MgO-C refractories. Taikabutsu Overseas, v. 4, n. 1, p. 32-7, Mar. 1984.
10 YAMAGUCHI, A.; NISHIO, H. Metal precipitation in magnesia clinker of magnesia carbon refractories. Taikabutsu Overseas, v. 8, n. 3, p. 46-9, Sept. 1988.
2 QUINTELA, M. A.; PESSOA, C. A.; KOKKE, M. M. Caracterização de tijolos de MgO-C para convertedor. In: SEMINÁRIO DE ACIARIA - INTERNACIONAL, 38., 2007, Belo Horizonte, MG. Anais ... São Paulo: ABM, 2007. 1 CD.
3 SURUGA, T.; HATAE, E.; HOKII, T.; ASANO, K. Spalling resistance and physical behavior of MgO-C refractories at high temperature. Journal of the Technical Association of Refractories, v. 25, n. 2, p. 128-31, June 2005.
4 YAMAGUCHI, A.; KUN, Y. J. Formation and expansion of open pore in carbon-containing refractories and their prevention. Taikabutsu Overseas, v. 14, n. 1, p. 20-5, Mar. 1994.
5 ZHANG, S.; MARRIOTT, N. J.; LEE, W. E. Thermochemistry and microstructure of MgO-C refractories containing various antioxidants. Journal of the European Ceramic Society, v. 21, n. 8, p. 1037-47, Aug. 2001.
6 YAMAGUCHI, A. Thermochemical analysis for reaction processes of aluminium and aluminium-compounds in carboncontaining refractories. Taikabutsu Overseas, v. 7, n. 2, p. 11-6, June 1987.
7 ZHANG, S.; MARRIOTT, N. J.; LEE, W. E. Influence of additives on corrosion resistance and corroded microstructures of MgO-C refractories. Journal of the European Ceramic Society, v. 21, n. 13, p. 2393-405, Nov. 2001.
8 POIRIER J.; BOUCHETOU, M.L. Influence of iron oxides on corrosion of refractories used in steel making. Refractories Applications Transaction, v. 2, n. 3, p. 2-8, Nov.-Dec. 2006.
9 YAMAGUCHI, A. Control of oxidation-reduction in MgO-C refractories. Taikabutsu Overseas, v. 4, n. 1, p. 32-7, Mar. 1984.
10 YAMAGUCHI, A.; NISHIO, H. Metal precipitation in magnesia clinker of magnesia carbon refractories. Taikabutsu Overseas, v. 8, n. 3, p. 46-9, Sept. 1988.
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