Research on Cr₂O₃-Reinforcement High Quality Magnesia-Chrome Brick

Abstract:

The raw material is the fused grain magnesia-chrome and Indian concentrated chrome ore . The grain size proportion which is used in the preparation as follows: 4­-1mm 50%，≤1mm 17%,≤0.088mm 33% ,the 5 group samples are prepared by respectively adding extra 2%、4%、6%、8% fine power Cr₂O₃ to basic formula .Mixing and pressed under 200Mp and sintered at 1750,holding 8 hours ,the process of preparation of samples is finished .The dimension of samples is 230mm×114mm×65mm .Conclusion: the addition of fine power Cr₂O₃ can change the base material composition of magnesia-chrome ,form more secondry spinel and intergranular spinel ,promote direct bond between periclase and spinel .Adding quantitative fine power Cr₂O₃ can enhance the room properties and high temperature properties ,but as the increase of fine power Cr₂O₃ ,the sintering property is decreased ,the results are shown that the best content of fine power Cr₂O₃ should remain at about 4% .

• Periodical: Advanced Materials Research (Volumes 233-235)
• Pages: 2565-2570
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.233-235.2565
• Online since: May 2011
• Authors: Yang Li, Yong Li, Rui Li, Dong Wang
• Keywords: Cr₂O₃-reinforcement, Fused Grain, Magnesia-Chrome Brick

References

[1] Chen Hao ,Wang Xitang ,Xia Tao .Destruction mechanism of magnesia-chrome bricks for different kinds of high-temperature furnace .Papers of wuhan university of science and technology ,(2009) .

[2] Masaaki Yamamoto , Hironori Takeuchi , Hatsuo Taira . Examination of refractory corrosion test for secondary steel making using vacuum induction furnace .(2009)

[3] Yukio Kiryu, Hideo Yaoi, Seiji Aso, Tatsuo Matsumura, Shigetoshi Uto, Toshihiro Isobe, Proceedings of The 76th Technical Committee on Refractories for Steel Refining of TARJ

[4] Zhang Zhouming ,Yin Jie ,Ma Xufeng .Study on corrosion resistant of high chrome drick to float glass melt .Glass ,(2006) .

[5] Yin hong ji ,Geng keming ,Xu yanqing .Dense chromic oxide refractories and its application .Glass ,(2007) .

[6] Qi Xiaoqing ,Wang Yufan ,Zhang Hongda .Effect of sintering temperature on microstructure of hjgh chrome brick .Refractory ,( 2003) .

[7] Li Guangping .Basic refractory .Beijing :Metallurgical Press ,(1980) ,p.139 .

[8] Jiang Mingxue ,Li Yong .Chen Zhaoyou Papers of Refractory . Beijing :Metallurgical Press ,(1998) ,p.385 .

[9] Chen Zhaoyou ,Refractoriy Material . Beijing :Metallurgical Press , (1988) ,p.50 .