Corrosion of high-chrome refractory materials by high-sodium slag in an entrained-flow gasifier
Corrosion of high-chrome refractory materials by high-sodium slag in an entrained-flow gasifier
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气流床气化炉中高钠渣对高铬耐火材料的腐蚀
DOI：
10.1016/j.ceramint.2021.07.242
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发表时间：
2021-07
影响因子：
5.2
通讯作者：
Guangsuo Yu
中科院分区：
文献类型：
--
作者：
Kuiyu Liu;Qinghua Guo;Yan Gong;Xueli Chen;Tao Wu;Shuai Wang;Guangsuo Yu
混流式气化炉是一种高效的水煤浆制合成气技术，但由于熔渣，特别是碱性熔渣对耐火材料的磨损，给工业生产带来了挑战。分析了高铬耐火材料在工业化对置式多燃烧器气化炉中被高钠渣侵蚀后的宏观和微观结构。结合热力学计算，探讨了其腐蚀机理。结果表明，渣的渗透形成了反应层和渗透层。复合尖晶石贯穿了整个渗透过程，并利用EDS半定量分析了渗透渣的成分随渗透深度的变化。结果表明，高铬耐火材料与高钠渣之间的相互作用贯穿于整个熔透过程，直至铁镁元素耗尽。Na的存在改变了炉渣的特性，促进了炉渣向耐火材料中的渗透。但钠与高铬耐火材料的相互作用很弱。最后，研究了耐火材料中ZrO2颗粒的腐蚀行为，以了解无ZrO2区的形成。
An entrained-flow gasifier is an efficient technology for converting coal-water slurry into syngas, however, high refractory wear by molten slag, especially basic slag, introduces challenges during industrial practice. Herein, the corroded macrostructure and microstructure of a high-chrome refractory by high-sodium slag in a commercial industrial opposed multi-burner gasifier were analyzed. The corrosion mechanism thereof was investigated by combining thermodynamic calculations. The results show that reaction and penetration layers were formed with the penetration of the slag. Complex spinel existed throughout the penetration path. Furthermore, EDS was performed for semi-quantitative analysis of the composition of the infiltrated slag, as a function of the penetration depth. The results indicated that the interaction between the high-chrome refractory and high-sodium slag could exist in the entire penetration path until the Fe and Mg elements were exhausted. The presence of Na changed the characteristics of the slag, promoting the penetration of slag into the refractory. However, the interaction between Na and the high-chrome refractory was very poor. Finally, the corrosion behavior of ZrO2grains in the refractory was investigated to understand the formation of a ZrO2-less zone.
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影响因子：
5.2
作者：
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通讯作者：
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影响因子：
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影响因子：
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