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Effect of selected model parameters on predicted RAFT data
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Materials Science and Engineering.
2002 (English)In: Scandinavian journal of metallurgy, ISSN 0371-0459, Vol. 31, no 5, 328-341 p.Article in journal (Refereed) Published
Abstract [en]

A new raceway adiabatic flame temperature (RAFT) model has been developed where the effect of injected BOF slag has been considered. A parameter study was performed to evaluate the influence of (i) coke temperature factor, (ii) degree of silica reduction, (iii) coal powder burning degree, (iv) reduction degree of some components in injected BOF slag when leaving raceway, (v) enthalpy of coke burning and (vi) Cp value of coke. The coke burning enthalpy was found to have the largest influence on the absolute value of RAFT. In Swedish blast furnaces, the RAFT is usually kept relatively constant by adjusting the oxygen content in the blast. Therefore, the exchange ratios between the oxygen content in blast and the injected material to retain RAFT were predicted. The burning degree of coal powder was found to have the largest influence when coal powder was evaluated. Silica and silicon carbide reduction was found to have the largest influence when a change of BOF slag rate was evaluated.

Place, publisher, year, edition, pages
2002. Vol. 31, no 5, 328-341 p.
Keyword [en]
blast furnace practice, combustion, flux Injection, fuel injection, heat balance, ironmaking, mathematical models, mass balance, tuyeres, blast-furnace
Identifiers
URN: urn:nbn:se:kth:diva-21957ISI: 000178481100007OAI: oai:DiVA.org:kth-21957DiVA: diva2:340655
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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