Modeling of Blast Furnace with Layered Cohesive Zone

Xuefeng Dong, Aibing Yu, Sheng Jason Chew, Paul Zulli

Research output: Contribution to journalArticleResearchpeer-review

93 Citations (Scopus)

Abstract

An ironmaking blast furnace (BF) is a moving bed reactor involving counter-, co-, and crosscurrent flows of gas, powder, liquids, and solids, coupled with heat exchange and chemical reactions. The behavior of multiple phases directly affects the stability and productivity of the furnace. In the present study, a mathematical model is proposed to describe the behavior of fluid flow, heat and mass transfer, as well as chemical reactions in a BF, in which gas, solid, and liquid phases affect each other through interaction forces, and their flows are competing for the space available. Process variables that characterize the internal furnace state, such as reduction degree, reducing gas and burden concentrations, as well as gas and condensed phase temperatures, have been described quantitatively. In particular, different treatments of the cohesive zone (CZ), i.e., layered, isotropic, and anisotropic nonlayered, are discussed, and their influence on simulation results is compared. The results show that predicted fluid flow and thermo- chemical phenomena within and around the CZ and in the lower part of the BF are different for different treatments. The layered CZ treatment corresponds to the layered charging of burden and naturally can predict the CZ as a gas distributor and liquid generator.
Original languageEnglish
Pages (from-to)330 - 349
Number of pages20
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume41
Issue number2
DOIs
Publication statusPublished - 2010
Externally publishedYes

Cite this