Effect of Novel Binder SioxX-Zero on Microstructure and Properties of No-Cement Castables for Coal Burner Pipe

Abstract

Abstract: As the key bearing component of cement kiln, the coal burner pipe is subjected to severe long-term abrasion by high temperature clinker dust and airflow, thus requires better high temperature mechanical properties. In this work, the novel SioxX-Zero and traditional calcium aluminate cement were used as binders to prepare no-cement and low-cement Al₂O₃-SiC castables for coal burner pipe. All castable specimens applied tabular corundum, α-Al₂O₃ powder and SiC as main raw materials, and should be fired at 1 100 ℃ and 1 400 ℃ for 3 h. The effect of SioxX-Zero on microstructure, physical properties and high temperature mechanical properties for castables were investigated. The results show that, compared with traditional calcium aluminate cement, the introduction of SioxX-Zero increases flowability and delays flowability decrease of castables, improving the workability. Moreover, more needle-liked mullite with larger size in-situ forms in Al₂O₃-SiC castables containing SioxX-Zero, which significantly enhances the cold modulus of rupture, cold crushing strength, hot modulus of rupture and high-temperature abrasion resistance.

Key words: refractory, binder, no-cement castable, Al₂O₃-SiC castable, SioxX-Zero, cement kiln, coal burner pipe

CLC Number:

TQ175

ZHANG Sisi, WANG Qinghu, PENG Hong, LI Yawei, SHU Xiaomei, DAI Changhao, WANG Danbin, ARINDAM Mukherjee. Effect of Novel Binder SioxX-Zero on Microstructure and Properties of No-Cement Castables for Coal Burner Pipe[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(10): 3298-3304.

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