碳源对Al2O3-SiC-C质铁沟浇注料性能影响的研究进展

摘要/Abstract

摘要： 本文综述了沥青、炭黑、焦炭和石墨等常规碳源,表面改性碳以及新型碳源对Al₂O₃-SiC-C质铁沟浇注料性能影响的研究概况。沥青在Al₂O₃-SiC-C质浇注料中发挥着重要作用,其加热软化后渗透或挥发、凝结到浇注料的缝隙或气孔中,可以增强颗粒之间的结合,改善高温下液相分布,避免过烧结,显著提高浇注料的抗渣性能。炭黑粒度细小,可充分填充空隙,降低烧后试样的气孔平均孔径,改善高温下抗侵蚀性。炭黑、焦炭和石墨等常规碳源适合作为附加碳源和沥青配合使用,达到互补的效果。表面改性碳中造粒石墨具有较好的应用效果,可大幅提高Al₂O₃-SiC-C质铁沟浇注料中鳞片石墨的引入量,显著提高抗渣性能。新型碳源中含碳树脂粉Carbores P配合沥青添加到Al₂O₃-SiC-C质铁沟浇注料中可有效提高铁沟服役寿命。

关键词: 铁沟, Al₂O₃-SiC-C质浇注料, 沥青, 炭黑, 造粒石墨, Carbores P

Abstract: The effects of conventional carbon sources such as pitch, carbon black, coke and graphite, etc., surface modified carbon and new carbon sources on the properties of Al₂O₃-SiC-C iron trough castable were summarized. It was pointed out that pitch plays an important role in Al₂O₃-SiC-C castable. After softening by heating, pitch penetrates or volatilizes and condenses into the grains boundary or pores of the castable, which enhances the bonding between grains. Pitch which is uniformly distributed in matrix of castable can improve the liquid phase distribution in matrix and avoid over sintering at high temperature, so as to significantly improve the slag resistance of the castable at high temperature. The particle size of carbon black is very small, which can fully fill the pores, reduce the average pore size of the calcined sample, and improve the corrosion resistance at high temperature. Carbon black, coke and graphite are suitable to be used together with pitch to achieve complementary effects.Granular graphite in surface modified carbon has good application effect, which can introduce more graphite in Al₂O₃-SiC-C iron trough castable by adding pelletized graphite and significantly improve the slag resistance. Besides, it can also effectively improve the service life of iron trough by adding Carbores P together with pitch to Al₂O₃-SiC-C castable.

Key words: iron trough, Al₂O₃-SiC-C castable, pitch, carbon black, pelletized graphite, Carbores P

中图分类号:

TQ175

张艳利, 李志刚, 杨文刚. 碳源对Al₂O₃-SiC-C质铁沟浇注料性能影响的研究进展[J]. 硅酸盐通报, 2022, 41(6): 2160-2166.

ZHANG Yanli, LI Zhigang, YANG Wengang. Research Progress on Effects of Carbon Sources on Properties of Al₂O₃-SiC-C Iron Trough Castable[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(6): 2160-2166.

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碳源对Al₂O₃-SiC-C质铁沟浇注料性能影响的研究进展

Research Progress on Effects of Carbon Sources on Properties of Al₂O₃-SiC-C Iron Trough Castable

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