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Thickness monitoring and discontinuous degradation mechanism of wear lining refractories for refining ladle

Journal of Iron and Steel Research(International) 2022年第7期29卷 1110-1118页

作者： Yan-zhu Huo Hua-zhi Gu Juan Yang Ao Huang Zheng Ma The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina School of Computer Science and Technology Wuhan University of Science and TechnologyWuhan 430081HubeiChina Zhejiang Zili High Temperature Technology Co. Ltd.Shaoxing 312300ZhejiangChina

As a functional metallurgical container for molten steel,refining ladle has a great influence on the smelting safety and quality of steel.The online monitoring of the residual thickness for ladle lining was applied to increase the smelting efficiency and safety.It is found that the ladle refractories show obvious discontinuous degradation characteristics through the monitoring data.Moreover,the degradation of low-carbon magnesia–carbon brick at slag line and corundum-based castable at steel bath was calculated according to the established corrosion model and crack propagation model,respectively.The discontinuous degradation mechanism of the ladle refractories is illustrated,which is of great significance to the optimal configuration of the ladle lining refractories.

关键词： refining ladle Refractory Discontinuous degradation Monitoring Modeling

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Progress and Developing Trend of Purging Plugs for refining ladle

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China's Refractories 2014年第2期23卷 39-42页

作者： ZHANG Ju SUN Xiaogai JIA Quanli WU Ran High Temperature Ceramics Institute Zhengzhou University

Damage reasons of purging plugs for refining ladle and research progress on thermal shock resistance of corundum- spinel purging plugs were summarized. Research achievements and application results of nonoxides bonded corundum purging plugs for refining ladle were briefly reviewed. The further research and developing trend of purging plugs was proposed.

关键词： purging plugs corundum - spinel nonox-ides thermal shock resistance refining ladle

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Development and Application of Carbon-free Al_(2)O_(3)-MgO Dense Bricks for Steel ladles

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China's Refractories 2022年第2期31卷 35-39页

作者： LUO Ming FANG Binxiang WEI Guoping LIU Guangping SHEN Mingke SONG Yanan Zhejiang Zili High Temperature Technology Co. Ltd.Shaoxing 312300China Zhejiang Zili Advanced Materials Co. Ltd.Shaoxing 312300China

Carbon-free Al_(2)O_(3)-MgO dense bricks were produced by the pressing method,using tabular alumina,white fused alumina,alumina micro-powder as main raw materials,and inorganic powder as the binder.The comprehensive properties and performance in steel ladle side wall were made a comparison between Al_(2)O_(3)-MgO dense bricks and precast blocks.The results show that Al_(2)O_(3)-MgO dense bricks exhibit high dense structure and strength,as well as superior thermal shock resistance and better penetration and corrosion resistance to slag than precast blocks.While replacing precast blocks with dense bricks in 250 t steel ladle side wall in some domestic steel mills,the thickness of the metamorphic layer from slag penetration and the corrosion rate decrease evidently.The damage of dense bricks during service is mainly caused by the corrosion from molten steel and slag,and the structure spalling of the metamorphic layer also plays an important role.

关键词： refining ladle alumina-magnesia material carbon-free dense brick precast block damage mechanism

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Innovative Lining of Unburnt Al_(2)O_(3)-MgO Brick for 300t Steel ladle in Baosteel

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China's Refractories 2021年第1期30卷 17-22页

作者： GAN Feifang GUO Zongqi GAO Jianying WANG Tao WANG Zhaohui Baoshan Iron&Steel Co. Ltd.Shanghai 201900China Trasteel International SA Lugano CH-6900Switzerland Imerys(China)Co. Ltd.Tianjin 300457China Zhaohui Energy-Saving Technology Co. Ltd.Tieling 112000China

The manufacture of clean steel needs high performance carbon-free bricks for ladle lining.Based on long term application experiences of the prefab Al_(2)O_(3)-MgO blocks,unburnt Al_(2)O_(3)-MgO brick has been developed by pressing a mix of alumina,spinel and magnesia as major raw materials and Al_(2)O_(3)-MgO gel powder as binder.In addition to low open porosity and high strength,the unburnt Al_(2)O_(3)-MgO brick shows superior corrosion resistance and thermal shock resistance to the prefab block.Field trials in a 300t steel ladle have indicated the residual lining of unburnt Al_(2)O_(3)-MgO bricks showed smooth surface without large spalling and seldom steel infiltration,consequently longer service life than the prefab blocks.The reliable,unburnt Al_(2)O_(3)-MgO bricks have more advantages of high efficiency,energy-saving and eco-friendly production.It will be one of the best options for ladle lining in the manufacture of high-purity steel.

关键词： unburnt Al2O3-MgO bricks carbon-free pressing clean steel refining ladle

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