东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (7): 987-991.DOI: 10.12068/j.issn.1005-3026.2014.07.017

• 材料与冶金 • 上一篇    下一篇

高炉炉缸黏滞层物相及形成机理

焦克新1,2，张建良1,2，左海滨2，赵永安3   

  1. (1 北京科技大学 冶金与生态工程学院， 北京100083; 2 北京科技大学 钢铁冶金新技术国家重点实验室， 北京100083; 3 河南五耐集团实业有限公司， 河南 巩义451250)
  • 收稿日期:2013-08-13 修回日期:2013-08-13 出版日期:2014-07-15 发布日期:2014-04-11
  • 通讯作者: 焦克新
  • 作者简介:焦克新(1988-)，男，河南信阳人，北京科技大学博士研究生;张建良(1965-)，男，天津人，北京科技大学教授，博士生导师.
  • 基金资助:
    国家重点基础研究发展计划项目(2012CB720401).

Composition and Formation Mechanism of Viscous Layers in Blast Furnace Hearth

JIAO Kexin1,2， ZHANG Jianliang1,2， ZUO Haibin2， ZHAO Yongan3   

  1. 1 School of Metallurgical and Ecological Engineering， University of Science and Technology Beijing， Beijing 100083， China; 2 State Key Laboratory of Advanced Metallurgy， University of Science and Technology Beijing， Beijing 100083， China; 3 Henan Winna Industrial Group Co. Ltd.， Gongyi 451250， China.
  • Received:2013-08-13 Revised:2013-08-13 Online:2014-07-15 Published:2014-04-11
  • Contact: ZUO Haibin
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摘要： 通过对高炉炉缸黏滞层化学成分分析、XRD、SEM-EDS分析及对炉缸用碳复合砖性能、微观结构的研究，探明了炉缸黏滞层的形成机理.结果表明:碳复合砖本身致密的微观结构使其具有优良的抗渣铁侵蚀性能，且具备自护炉机制，能够形成石墨-C层、高铝渣层、石墨层多相体系.并通过计算得出高炉炉缸侧壁石墨碳析出热力学条件，表明在一定的铁水流动条件下，石墨碳与铁水存在溶解析出平衡，从而隔离开铁水与砖衬的直接接触，延缓砖衬侵蚀，实现高炉炉缸长寿.

关键词: 高炉, 炉缸, 碳复合砖, 黏滞层, 石墨碳

Abstract: The formation mechanism of the viscous layer in the blast furnace hearth was studied through chemical analysis， XRD， SEMEDS analysis and the carbon composite brick property test. The results showed that the carbon composite brick has excellent anticorrosion properties to the iron and slag because of its dense microstructure. Furthermore， it has selfprotection function by formation the multiphase system consisted of the graphiteC layer， high alumina slag layer and the graphite layer. The thermodynamic condition of the graphite precipitation on the sidewall of the hearth was calculated. Under a certain flow condition of the molten iron， there was a dissolution and precipitation equilibrium between the graphite precipitation and the molten iron. Thereby， the graphite separated the direct contact of the molten iron from the brick. Then the erosion of the brick slowed down and the long service life of the blast furnace was achieved.

Key words: blast furnace, hearth, carbon composite brick, viscous layer, graphite

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