Next Generation Carbon-Containing Refractory Composites
Next Generation Carbon-Containing Refractory Composites
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DOI：
10.4028/www.scientific.net/ast.45.2246
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发表时间：
2006-10
期刊：
影响因子：
--
通讯作者：
Shaoyong Zhang
中科院分区：
文献类型：
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作者：
Shaoyong Zhang
含碳耐火砖在全球钢铁工业中广泛使用。自1970年代第一代产品投入商用以来，其加工工艺、微观结构和性能得到了显着改善，工业炉的使用寿命也因此大大延长。除了对含碳耐火砖的研究之外，世界范围内已经并正在为含碳耐火浇注料的开发做出大量努力。本文重点介绍了新一代含碳耐火砖和含碳耐火浇注料的最新研发成果。第一部分总结了目前用于提高含碳耐火砖机械性能的技术。介绍了一种使用催化生长技术在含碳耐火砖中原位产生氧化物纳米纤维和/或碳纳米管的新概念。第二部分阐述了低碳含碳耐火砖的一些重要技术问题。除了耐热震性之外，还讨论了使用纳米碳所产生的其他新问题，例如加速 MgO-C 反应和碳氧化。文章最后讨论了阻碍含碳浇注料发展的技术难点及克服措施。介绍了谢菲尔德最近开发的一种新型熔盐合成技术，用于在石墨上制备高质量的碳化物涂层。
Carbon-containing refractory bricks are used extensively in the steel industry worldwide. Since the first generation became commercially available in the 1970’s, their processing, microstructures and properties have been improved dramatically, and the service lives of industrial furnaces have thus been extended substantially. In addition to the work on carboncontaining refractory bricks, much effort has been, and is being, made worldwide towards the development of carbon-containing refractory castables. In this paper, the latest R & D towards new generation carboncontaining refractory bricks as well as carbon-containing refractory castables have been highlighted. In the first part, current techniques used to improve mechanical properties of carbon-containing refractory bricks are summarised. A new concept using a catalytic-growth technique to create insitu oxide nanofibres and/or carbon nanotubes in carbon-containing refractory bricks is introduced. The second part addresses some important technical issues of low carbon carbon-containing refractory bricks. Besides the concern about thermal shock resistance, other new problems arising from the use of nanosized carbon, such as the accelerated MgO-C reaction and carbon oxidation, are discussed. In the final part of the paper, technical difficulties hindering the development of carbon-containing castables as well as measures to overcome them are discussed. A novel molten salt synthesis technique developed recently at Sheffield to prepare high quality carbide coatings on graphite is introduced.