:Thermal Evolution of Al-containing Magnesia Refractories for RH Snorkels论文

:Thermal Evolution of Al-containing Magnesia Refractories for RH Snorkels论文

本文主要研究内容

作者(2019)在《Thermal Evolution of Al-containing Magnesia Refractories for RH Snorkels》一文中研究指出:Resin-bonded, Al-containing magnesia refractories have been an alternative of rebonded fused-grains magchrome bricks to be used as inner lining in the snorkels and lower vessel of RH degassers, having the advantages of being chrome-free and energy-saving(without burning), with a comparable performance. Microstructural investigations indicate that metal Al powder remains independent in the matrix after heating at 700 ℃ and 900 ℃, and Al4C3, Al2OC and Al4O4C crystalline whiskers start forming from 1 100 ℃. The whiskers grow and connect into a network matrix with increasing temperatures,remaining up to 1 600 ℃. Comparison of used bricks from different snorkels indicates a strong whisker networks formation in the brick achieving long service life and superior performance, which is attributed to flexible network structure of stable and interwoven whiskers. On contrary, there is a strongly-oxidized layer on the hot face and almost no whisker found anywhere in the brick with the short service life. It is vital to form the bonding phase of whiskers at high temperatures,generating overall properties of high hot strength, high erosion resistance and thermal shock resistance, which are essential in the working conditions of RH snorkels.

Abstract

Resin-bonded, Al-containing magnesia refractories have been an alternative of rebonded fused-grains magchrome bricks to be used as inner lining in the snorkels and lower vessel of RH degassers, having the advantages of being chrome-free and energy-saving(without burning), with a comparable performance. Microstructural investigations indicate that metal Al powder remains independent in the matrix after heating at 700 ℃ and 900 ℃, and Al4C3, Al2OC and Al4O4C crystalline whiskers start forming from 1 100 ℃. The whiskers grow and connect into a network matrix with increasing temperatures,remaining up to 1 600 ℃. Comparison of used bricks from different snorkels indicates a strong whisker networks formation in the brick achieving long service life and superior performance, which is attributed to flexible network structure of stable and interwoven whiskers. On contrary, there is a strongly-oxidized layer on the hot face and almost no whisker found anywhere in the brick with the short service life. It is vital to form the bonding phase of whiskers at high temperatures,generating overall properties of high hot strength, high erosion resistance and thermal shock resistance, which are essential in the working conditions of RH snorkels.

论文参考文献

  • [1].Technology Progress of Refractories for Iron Making in China[J]. CHAI Junlan, CHENG Qingxian and SHEN Keyin SinoSteel Corporation Luoyang Institute of Refractories Research, Luoyang 471039, China.  China’s Refractories.2005(04)
  • [2].A Review on Some Applications of Magnesia in Current China Refractories Industry[J]. LIU JiehuaSinosteel Luoyang Institute of Refractories Research(LIRR), Luoyang, Henan 471039,China.  China’s Refractories.2006(02)
  • [3].Eco-Friendly Smokeless Al2O3-SiC-C Brick for Hot Metal Ladle[J]. Santanu MUKHOPADHYAY,Shankha CHATTERJEE,Manoj K NANDA.  China’s Refractories.2008(01)
  • [4].Main Influencing Factors on Service Life of High Chrome Refractories for Coal Water Slurry Gasifiers[J]. HU Piao,WANG Jing,GENG Kerning,WANG Han,TAN Qinghua,SHI Pengkun,YIN Hongji.  China’s Refractories.2017(02)
  • [5].Corrosion of Disposing Urban Domestic Wastes on Refractories for Cement Rotary Kilns[J]. WANG Juntao,MAO Enliang,YE Yahong,ZHOU Yandun,HU Jianhui,XU Rulin.  China’s Refractories.2016(02)
  • [6].Buyers’Guide[J].   China’s Refractories.2010(02)
  • [7].Application of MgO-CaO Refractories in Secondary Refining Furnaces[J]. GAO Xinkui1,YIN Guoxiang1,2 1 Yingkou Qinghua Refractories Co. ,Ltd. ,Dashiqiao 115100,China 2 School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China.  China’s Refractories.2012(01)
  • [8].Reuse and Reproduction of Used Refractories[J]. TIAN Shouxin~(1) and YU Yanwen~(1,2) 1 Baosteel Technology Center, Shanghai 201900, P. R. China) (2 Tianjin University, Tianjin 300072, P. R. China).  China’s Refractories.2006(01)
  • [9].Characteristics of Hercynite and Its Application in Refractories[J]. ZHANG Xiaohui1,YU Renhong2,YU Xingguo1 1 Sinosteel Luoyang Institute of Refractories Research Co. ,Ltd. ,Luoyang 471039,China 2 High Temperature Materials Institute,Henan University of Science and Technology, Luoyang 471003,China.  China’s Refractories.2012(02)
  • [10].Abstracts Selected from Naihuo Cailiao(Refractories)——A Chinese Language Bimonthly Volume 51,Number 3,2017[J].   China’s Refractories.2017(03)
  • 论文详细介绍

    论文作者分别是来自China’s Refractories的,发表于刊物China’s Refractories2019年01期论文,是一篇关于,China’s Refractories2019年01期论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自China’s Refractories2019年01期论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。

    标签:;  

    :Thermal Evolution of Al-containing Magnesia Refractories for RH Snorkels论文
    下载Doc文档

    猜你喜欢