Damage Mechanism of Silicon Carbide-mullite Bricks for Transition Zone of Cement Rotary Kilns

doi:10.19691/j.cnki.1004-4493.2020.04.007

China's Refractories ›› 2020, Vol. 29 ›› Issue (4): 35-39.DOI: 10.19691/j.cnki.1004-4493.2020.04.007

• Original article • Previous Articles Next Articles

Damage Mechanism of Silicon Carbide-mullite Bricks for Transition Zone of Cement Rotary Kilns

LI Guangqi¹, CHEN Junhong¹^,^*(), JIA Yuanping², LI Bin¹, ZHU Bo², CHEN Xiaoliang²

1 School of Materials Science and Engineering, University of Science and Technology Beijing,Beijing 100083, China
2 Zibo City Luzhong Refractory Co., Ltd., Zibo 255138, China

Online:2020-12-15 Published:2020-12-15
Contact: CHEN Junhong
About author:Li Guangqi, born in 1985, obtained his bachelor’s degree from Shandong University of Technology in 2007, majored in inorganic non-metal materials. Now, he is studying for a doctor degree in School of Materials Science and Engineering, University of Science and Technology Beijing. His main research direction is the preparation of refractory raw materials.

Abstract

Abstract:

In order to improve the service performance and explore the damage mechanism of silicon carbide-mullite bricks for the transition zone of cement rotary kilns, the phase composition and the microstructure of a used brick in the transition zone of a cement rotary kiln were analyzed by XRD, SEM and EDS. The results show that the liquid and alkali vapor phases generated by the reaction between cement materials and the silicon carbide-mullite brick mostly enter the silicon carbide-mullite brick through the pores; meanwhile, Ca⁺ and K⁺ in the cement penetrate through the liquid maintaining a high chemical potential energy to dissolve Al₂O₃ and SiO₂ at the top of the liquid phase thus enhancing the phase penetration; with the decreasing temperature, crystals such as gehlenite, potassium feldspar and potassium chloride are precipitated, which destroy the original structure and increase the difference of thermal expansion coefficient between the high temperature dense end and the metamorphic layer thus resulting in cracks, spalling, and rupture.

Key words: cement rotary kiln, transition zone, silicon carbide-mullite brick, damage mechanism

LI Guangqi, CHEN Junhong, JIA Yuanping, LI Bin, ZHU Bo, CHEN Xiaoliang. Damage Mechanism of Silicon Carbide-mullite Bricks for Transition Zone of Cement Rotary Kilns[J]. China's Refractories, 2020, 29(4): 35-39.

Figures/Tables 4

References 18

[1]	Shi Suhuan, Wang Baoyu, Jiang Mingxue, Li Yong. Wear mechanism of magnesia-spinel brick used in transition zone of large dry-process cement rotary kiln. Naihuo Cailiao (Refractories, in Chinese), 2006, 40(6): 419-422
[2]	R. Dal Maschio, B. Fabbri, C. Fiori. Industrial applications of refractories containing magnesium aluminate spinel. Industrial Ceramics, 1988, 8(3): 121-126.
[3]	V. I. Shubin, V. I. Nikonorov. Periclase-spinel refractories for rotary cement kilns. Refractories and Industrial Ceramics, 1996, 37(1-2): 52-54.
[4]	C. L. Macey. Refractory solutions for high wear in cement kiln transition zones. Proceedings of UNITER’97, New Orleans, USA, 1997: 1625-1631.
[5]	Guo Zongqi, Stefan Palco, Michel Rigaud. Reaction characteristics of magnesia-spinel refractories with cement clinker. International Journal of Applied Ceramic Technology, 2005, 2(4): 327-335.
[6]	Zhang Pingxuan, Hu Fan, Peng Liyun. Production of periclase-spinel bricks and their application in cement kiln. Journal of Wuhan Yejin University of Science & Technology (Natural Science Edition) (in Chinese), 1999, 22(3): 245-247.
[7]	Wang Jiezeng, Yuan Lin. Progress on research and deve-lopment of refractories for cement kiln under new situation. Bulletin of the Chinese Ceramic Society (in Chinese), 2016, 35(10): 3219-3223.
[8]	Liu Zhenying, Yao Feng. Preparation and application of special silicon mullite brick for cement kiln. Bulletin of the Chinese Ceramic Society (in Chinese), 2012, 31(1): 128-131.
[9]	Xu Pingkun. Study on silicon carbide-mullite brick. Refractories & Lime (in Chinese), 2013(1): 14-18.
[10]	Ma Shulong, Huang Zhaohui, Gao Changhe, Fang Minghao, Wang Liujun. The properties of plastic phase mullite-SiC bricks and its utilization in cement kilns. Key Engineering Materials, 2015, 633: 88-92.
[11]	Hou Xinmei, Zhang Guohua, Chou Kuo-Chih. Influence of particle size distribution on oxidation behavior of SiC powder. Journal of Alloys and Compounds, 2009, 477(1-2): 166-170.
[12]	Atanu Dey, Nijhuma Kayal, Atiar Rahaman Molla, Omprakash Chakrabarti. Investigation of thermal oxidation of Al₂O₃-coated SiC powder. Thermochimica Acta, 2014: 25-31.
[13]	Jia Quanli, Zhang Haijun, Li Suping. Effect of particle size on oxidation of silicon carbide powders. Ceramics International, 2007, 33(1): 309-313.
[14]	Ren Bo, Sang Shaobai, Li Yawei, Xu Yibiao. Effects of oxidation of SiC aggregates on the microstructure and properties of bauxite-SiC composite refractories. Ceramics International, 2015, 41(2, Part B): 2892-2899.
[15]	Ren Bo, Li Yawei, Jin Shengli, Sang Shaobai. Correlation between chemical composition and alkali attack resistance of bauxite-SiC refractories in cement rotary kiln. Ceramics Inter-national, 2017, 43(16): 14161-14167.
[16]	V. I. Shubin. The lining for rotary cement kilns. Refractories and Industrial Ceramics, 2001, 42(3-4): 130-136.
[17]	Shen Wei. Cement Technology(in Chinese). Beijing: China Construction Industry Press, 1991: 51-60.
[18]	Li Hongzhu. Principle of Metallurgy(in Chinese). Beijing: Science Press, 2005: 72-76.

Points	C	O	Si	Al	Ca	K	Cl	Fe	Ti
1	—	40.86	—	59.14	—	—	—	—	—
2	66.95	1.98	30.78	0.59	—	—	—	—	—
3	—	51.16	48.84	—	—	—	—	—	—
4	—	49.76	12.27	37.97	—	—	—	—	—
5	—	54.79	21.59	19.52	1.30	0.89	—	0.76	1.15
6	—	—	—	—	—	49.13	50.87	—	—
7	—	48.89	12.62	12.98	25.51	—	—	—	—
8	—	43.12	42.76	7.19		6.93	—	—	—
9	—	52.82	22.91		24.27	—	—	—	—
10	—	49.66	16.89		33.45	—	—	—	—
11	—	—	—	—	48.63	—	51.37	—	—

Points	C	O	Si	Al	Ca	K	Cl	Fe	Ti
1	—	40.86	—	59.14	—	—	—	—	—
2	66.95	1.98	30.78	0.59	—	—	—	—	—
3	—	51.16	48.84	—	—	—	—	—	—
4	—	49.76	12.27	37.97	—	—	—	—	—
5	—	54.79	21.59	19.52	1.30	0.89	—	0.76	1.15
6	—	—	—	—	—	49.13	50.87	—	—
7	—	48.89	12.62	12.98	25.51	—	—	—	—
8	—	43.12	42.76	7.19		6.93	—	—	—
9	—	52.82	22.91		24.27	—	—	—	—
10	—	49.66	16.89		33.45	—	—	—	—
11	—	—	—	—	48.63	—	51.37	—	—

China's Refractories

Damage Mechanism of Silicon Carbide-mullite Bricks for Transition Zone of Cement Rotary Kilns

RichHTML

PDF

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 4

References 18

Related Articles 7

Recommended Articles

Metrics

Comments

[1]	ZHOU Yandun, WU Xingsheng, HU Jianhui, WANG Juntao. Impact of Bauxite on Performance and Structure of SiC-mullite Brick [J]. , 2018, 27(1): 35-38.
[2]	HU Piao, GENG Keming, WANG Han, TAN Qinghua, SHI Pengkun, YIN Hongji. Main Influencing Factors on Service Life of High Chrome Refractories for Coal Water Slurry Gasifiers [J]. , 2017, 26(2): 31-34.
[3]	WANG Juntao,MAOEnliang,YEYahong, ZHOU Yandun, HU Jianhui, XU Rulin. Corrosion of Disposing Urban Domestic Wastes on Refractories for Cement Rotary Kilns [J]. , 2016, 25(2): 25-28.
[4]	CHEN Zhaoyou. Chrome-free Basic Refractories for Burning Zone of Cement Rotary Kiln [J]. China's Refractories, 2011, 20(4): -.
[5]	LIU Huilin. Properties of MagnesiaCHercynite Brick [J]. China's Refractories, 2008, 17(1): -.
[6]	CHEN Zhaoyou. Comprehensive Utilization of the Natural Magnesium-Containing Resources and the Development of the MgO-based Refractories [J]. China's Refractories, 2005, 14(2): -.
[7]	GUO Zongqi,Michel Rigaud. Adherence Characteristics of Cement Clinker on Basic Bricks [J]. China's Refractories, 2002, 11(4): -.