Influences of Different Carbon Materials on Properties of Alumina-Carbon Castables

Abstract

Abstract: Carbon containing castables have always attracted attention due to the poor water wettability of carbon materials and poor material properties caused by high-temperature oxidation. Thermal oxidized graphite, ZrC coated graphite and biomass carbon materials were added as carbon sources to alumina-carbon castables, and their influences on the apparent porosity, physical properties, phase composition, oxidation resistance and slag corrosion resistance were studied. The results show that the castable with thermal oxide graphite has the highest water addition, its residual pores impart the internal structure of the castable, leading to low mechanical properties. Adding ZrC coated graphite reduces the water addition of the castable, then gets better oxidation resistance and effects slightly the improvement of mechanical properties. Using biomass carbon material as carbon source significantly improves the physical properties of the castable, and compared to the sample with thermal oxidized graphite added, the biomass carbon material does not significantly improve the slag corrosion resistance of the sample.

Key words: refractory, alumina-carbon castable, modified graphite, biomass carbon material, oxidation resistance, corrosion resistance

CLC Number:

TQ175

KUANG Changliu, WANG Xing, LIU Zhenglong, DING Jun, YU Chao, DENG Chengji, ZHU Hongxi. Influences of Different Carbon Materials on Properties of Alumina-Carbon Castables[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(10): 3241-3247.

References

[1] ZHANG S, LEE W E. Carbon containing castables: current status and future prospects[J]. British Ceramic Transactions, 2002, 101(1): 1-8.
[2] 丁岩峰,谢朝晖.MgO-C质浇注料的研究[J].耐火材料,2002,36(1):21-23.
DING Y F, XIE Z H. Research on MgO-C castable[J]. Refractories, 2002, 36(1): 21-23 (in Chinese).
[3] 朱伯铨.含炭浇注料的现状与发展[J].耐火材料,1999,33(1): 53-56.
ZHU B Q. Current situation and development of the carboncontained castables[J]. Refractories, 1999, 33(1): 53-56 (in Chinese).
[4] ZHU B Q, ZHU Y N, LI X C, et al. Effect of ceramic bonding phases on the thermo-mechanical properties of Al₂O₃-C refractories[J]. Ceramics International, 2013, 39(6): 6069-6076.
[5] DING J, YU C, LIU J P, et al. Effects of silicon powder content on the properties and interface bonding of nitrided Al₂O₃-C refractories[J]. Materials Chemistry and Physics, 2018, 206: 193-203.
[6] WANG H, LI Y W, ZHU T B, et al. Microstructures and mechanical properties of Al₂O₃-C refractories with addition of microcrystalline graphite[J]. Ceramics International, 2014, 40(7): 11139-11148.
[7] WANG Q H, LI Y W, SANG S B, et al. Effect of the reactivity and porous structure of expanded graphite (EG) on microstructure and properties of Al₂O₃-C refractories[J]. Journal of Alloys and Compounds, 2015, 645: 388-397.
[8] LIU Z L, DENG C J, YU C, et al. Preparation of in situ grown silicon carbide whiskers onto graphite for application in Al₂O₃-C refractories[J]. Ceramics International, 2018, 44(12): 13944-13950.
[9] FRANKLIN S A, TUCKER B J S. Hot strength and thermal shock resistance of magnesia-carbon refractories[J]. British Ceramic Transactions, 1995, 94(4): 151-156.
[10] MUÑOZ V, PENA P, MARTÍNEZ A G T. Physical, chemical and thermal characterization of alumina-magnesia-carbon refractories[J]. Ceramics International, 2014, 40(7): 9133-9149.
[11] OLIVEIRA I R D, STUDART A R, PANDOLFELLI V C, et al. Zero-cement refractory castables[J]. American Ceramic Society Bulletin, 2002, 81(12): 27-34.
[12] 丁军.熔盐介质中碳材料改性及微孔轻质材料制备的基础研究[D].武汉:武汉科技大学,2013.
DING J. Basic research of carbon material modification and the preparation of microporous lightweight materials in molten salt media[D]. Wuhan: Wuhan University of Science and Technology, 2013 (in Chinese).
[13] LIU Z L, DENG C J, YU C, et al. Molten salt synthesis and characterization of SiC whiskers containing coating on graphite for application in Al₂O₃-SiC-C castables[J]. Journal of Alloys and Compounds, 2019, 777: 26-33.
[14] DUTTA S, DAS P, DAS A, et al. Significant improvement of refractoriness of Al₂O₃-C castables containing calcium aluminate nano-coatings on graphite[J]. Ceramics International, 2014, 40(3): 4407-4414.
[15] MUKHOPADHYAY S, DAS S, MOITRA S. Thermomechanical and thermophysical characteristics of alumina-carbon monolithic refractory containing surface-modified graphites in matrix[J]. Ceramics International, 2018, 44(9): 10061-10068.
[16] 李赛赛,王军凯,段红娟,等.水热碳化制备碳微球及其在Al₂O₃-SiC-C浇注料中的应用[J].硅酸盐学报,2018,46(3):341-346.
LI S S, WANG J K, DUAN H J, et al. Preparation of carbon spheres by hydrothermal carbonization and its application in Al₂O₃-SiC-C castable[J]. Journal of the Chinese Ceramic Society, 2018, 46(3): 341-346 (in Chinese).
[17] LI S S, LIU J H, WANG J K, et al. Catalytic preparation of graphitic carbon spheres for Al₂O₃-SiC-C castables[J]. Ceramics International, 2018, 44(11): 12940-12947.
[18] BI Y B, ZHANG H J, WANG H F, et al. Catalytic Fabrication of SiC/SiO₂ coated graphite and its behaviour in Al₂O₃-C castable systems[J]. Ceramics International, 2019, 45(13): 16180-16187.