Mathematical Optimization of Ironmaking with Biomass as Auxiliary Reductant in the Blast Furnace

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Helle H, Helle M, Saxen H, Pettersson F
Publisher: IRON STEEL INST JAPAN KEIDANREN KAIKAN
Publication year: 2009
Journal: Isij International
Journal acronym: ISIJ INT
Volume number: 49
Issue number: 9
Start page: 1316
End page: 1324
Number of pages: 9
ISSN: 0915-1559


Abstract

The potential of using biomass in ironmaking is investigated by simulation. Biomass is used to partially replace fossil reductants in the blast furnace process, which is described mathematically by a thermodynamic model. The model is cast in linear form to facilitate an efficient economic optimization of the production of raw steel, considering costs of raw materials, energy and CO(2) emissions of the unit processes up to the basic oxygen furnace. The high oxygen content and low heating value of biomass makes it necessary to study a possible external pyrolysis of it prior to injection into the furnace. The economy of biomass injection and its dependence on the price structure of raw materials and emissions are investigated. The results throws light on how the prices of biomass and emission rights, compared to the price of coal and coke, affect the optimal biomass pre-processing (pyrolysis) and injection rate.


Keywords

biomass injection, CO(2) emissions, ironmaking blast furnace, optimization, pyrolysis

Last updated on 2019-19-06 at 05:54