Interactions of Cr2O3–Al2O3–ZrO2 refractory with slags in an entrained-flow coal-water slurry gasifier

Shuai Wang, Wenjing Zhao, Yin Zhang, Qinghua Guo, Yan Gong, Tao Wu, Guangsuo Yu

Research output: Journal PublicationArticlepeer-review

2 Citations (Scopus)

Abstract

The corroded microstructures of the Cr2O3–Al2O3–ZrO2 refractory brick in an industrial opposed multi-burner (OMB) coal water slurry gasifier were investigated. It was found that the chromite spinel isolation layer rich in iron and magnesium was formed on the surface of the corroded brick body. By comparing and analyzing the corrosion of different zones in the gasifier, the results indicated that the molten slag entered the brick through the gaps and generated the spinel layer along the edge of the gaps, causing the dense structures of the refractory surface destroyed. In addition, in the high chrome brick corrosion experiment conducted by HTSM, 3 μm sized spinel were observed covering on the surface. The FactSage calculation results showed that the amount of spinel produced would drop significantly as the slag penetrated.

Original languageEnglish
Pages (from-to)1197-1207
Number of pages11
JournalCeramics International
Volume48
Issue number1
DOIs
Publication statusPublished - 1 Jan 2022

Keywords

  • C. Corrosion
  • D. Spinels
  • E. Refractories
  • Entrained-flow gasifier

ASJC Scopus subject areas

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

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