Dephosphorization model for a continuous DRI-EAF process

Mohammed A. Tayeb, Richard Fruehan, Seetharaman Sridhar, Chris Pistorius

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

For many steelmaking processes, mathematical modeling is an effective inexpensive way to predict the effects of changes in operational variables will have on the process. Several basic oxygen furnace (BOF) models have been developed over the years. In BOF steelmaking, the input materials are added at the beginning of the process, the metal and slag are tapped at the end, and the liquid bath is nearly homogeneous. In contrast, electric arc furnace (EAF) steelmaking operates with a liquid heel from the previous heat; fluxes, oxygen and carbon are injected continuously; and slag is semi-continuously flushed out. Clearly the EAF process is fundamentally different from BOF steelmaking. So far there have been few reports of modeling the phosphorus reaction in the EAF. Although many EAFs operate with scrap and pig iron, direct reduced iron (DRI) is increasingly used as input thanks in part to the lower prices of natural gas following shale gas development. In this work, a kinetic model for dephosphorization in DRI-EAF steelmaking has been developed. The model calculates the changes (with time) of slag composition, phosphorus (P) level of the steel, and the bulk & interface phosphorus partitions. This model is a part of ongoing research, thus, the presented results are preliminary.

Original languageEnglish (US)
Title of host publicationMaterials Science and Technology Conference and Exhibition 2014, MS and T 2014
PublisherAssociation for Iron and Steel Technology, AISTECH
Pages143-151
Number of pages9
ISBN (Electronic)9781634397230
StatePublished - 2014
Externally publishedYes
EventMaterials Science and Technology Conference and Exhibition 2014, MS and T 2014 - Pittsburgh, United States
Duration: Oct 12 2014Oct 16 2014

Publication series

NameMaterials Science and Technology Conference and Exhibition 2014, MS and T 2014
Volume1

Conference

ConferenceMaterials Science and Technology Conference and Exhibition 2014, MS and T 2014
Country/TerritoryUnited States
CityPittsburgh
Period10/12/1410/16/14

Keywords

  • Dephosphorization
  • DRI
  • EAF
  • Model
  • Process

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Materials Science(all)

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