High temperature softening behaviours of iron blast furnace feeds and their correlations to the microstructures

Mao Chen, Weidong Zhang, Zhixing Zhao, Dongqing Wang, Tim Evans, Baojun Zhao

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

3 Citations (Scopus)

Abstract

High temperature softening behaviours of iron blast furnace feeds (sinter, lump and pellet) have been determined under conditions simulated to the blast furnace. The industrial samples were packed with sandwich structure (coke / ore / coke) in graphite crucibles and 30 CO / 70 Ar gas mixture was blowing directly through the bottom of the crucibles. The displacement and temperature were continuously recorded simultaneously to construct the softening curves. Separated quenching experiments were also carried out at selected temperatures under the same gas atmosphere. The temperatures were selected corresponding to the turning points of the softening curves. The phase assemblages and composition of each phase in quenched samples were analysed by Electron Probe X-ray Microanalysis (EPMA). The proportion of the liquid formed at temperature was obtained from the backscattered electron images. The deformation characteristics of these complex multi-phase materials are shown to be related directly to the phase assemblages of the samples and the microstructures. FactSage was also used to assist the predictions of liquid / solid fractions and their compositions.

Original languageEnglish
Title of host publication6th International Symposium on High-Temperature Metallurgical Processing
EditorsTao Jiang, Jiann-Yang Hwang, Gerardo R. F. Alvear F., Onuralp Yücel, Xinping Mao, Hong Yong Sohn, Naiyang Ma, Phillip J. Mackey, Thomas P. Battle
Place of PublicationHoboken, NJ
PublisherJohn Wiley & Sons
Pages67-74
Number of pages8
ISBN (Electronic)9781119073574
ISBN (Print)9781119073574
DOIs
Publication statusPublished - 20 Feb 2015
Externally publishedYes
Event6th International Symposium on High-Temperature Metallurgical Processing - TMS 2015 144th Annual Meeting and Exhibition - Orlando, United States
Duration: 15 Mar 201519 Mar 2015

Other

Other6th International Symposium on High-Temperature Metallurgical Processing - TMS 2015 144th Annual Meeting and Exhibition
CountryUnited States
CityOrlando
Period15/03/1519/03/15

Keywords

  • BF feeds
  • FactSage prediction
  • Microstructures
  • Softening

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