Gasification Behaviors of Ferrocoke With and Without Water Vapor

Research output: Contribution to journalArticleResearchpeer-review

Authors

  • Runsheng Xu
  • Shuliang Deng
  • Xiaoming Huang
  • Jianliang Zhang
  • Jijian Zhu

Organisational units

External Organisational units

  • School of Metallurgical and Ecological Engineering, Univ. Sci. Techn.
  • The State Key Laboratory of Refractories and Metallurgy
  • Daye Special Steel Co. Ltd.

Abstract

High-reactivity coke can improve the reaction efficiency in a blast furnace, hence reducing CO2 emission. Herein, traditional coke sample (QM), normal ferrocoke sample (TJ), and modified ferrocoke sample (LQ) are examined. The effect of water vapor on the gasification behaviors and structural evolution of the samples are investigated. Furthermore, the 3D structures of the coke matrix and iron particles are reconstructed by serial sectioning method. The results show that under a pure CO2 atmosphere, the TJ and LQ samples start the gasification reaction earlier than the QM sample. The TJ sample shows the highest reactivity. Under CO2 + H2O atmosphere, the conversion rate of TJ and LQ samples is slowed. The reoxidation of the metallic iron within the ferrocoke is found for the first time during gasification and causes this phenomenon. Under experimental conditions, when water vapor appears in the atmosphere, the product layer of ferrocoke becomes more porous, and the iron particles have higher possibilities to be oxidized by CO2.

Details

Original languageEnglish
Article number2200575
Number of pages12
JournalSteel research international
Volume93.2022
Issue number11
Early online date9 Sep 2022
DOIs
Publication statusPublished - 25 Sep 2022