Corrosion of high-chrome refractory materials by high-sodium slag in an entrained-flow gasifier

Kuiyu Liu, Qinghua Guo, Yan Gong, Xueli Chen, Tao Wu, Shuai Wang, Guangsuo Yu

Research output: Journal PublicationArticlepeer-review

4 Citations (Scopus)

Abstract

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 ZrO2 grains in the refractory was investigated to understand the formation of a ZrO2-less zone.

Original languageEnglish
Pages (from-to)30648-30656
Number of pages9
JournalCeramics International
Volume47
Issue number21
DOIs
Publication statusPublished - 1 Nov 2021

Keywords

  • Entrained-flow gasifier
  • High chrome refractory
  • High-sodium slag
  • Slag corrosion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Corrosion of high-chrome refractory materials by high-sodium slag in an entrained-flow gasifier'. Together they form a unique fingerprint.

Cite this