Staged implementation of alternative processes in an existing integrated steel mill for improved performance and reduced CO2 emissions. Part I: technical concept analysis

Kristin Onarheim (Corresponding Author), Antti Arasto

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

In this study, an alternative operational concept for the blast furnace has been evaluated for an integrated iron and steel mill. The integrated iron and steel mill evaluated was based on the blast furnace and basic oxygen furnace (BF + BOF) hot metal production route equipped with a gas boiler power plant for power production. The alternative assessed was increased pulverized coal injection (PCI) as reducing agent to the blast furnace. Accompanied with a higher rate of oxygen feed to the blast furnace, this reduces the coke consumption in the blast furnace and increases the blast furnace top gas calorific value. The increased calorific value enables combustion of the blast furnace top gas in a high efficiency gas turbine for power production. Combining this modified blast furnace concept with pre-combustion carbon capture will enable a reduction in the total CO2 emissions from the steel mill. Three concepts were evaluated: a modified blast furnace concept without carbon capture, a modified blast furnace concept with MEA-based pre-combustion CO2 capture and a modified blast furnace concept with Selexol-based pre-combustion CO2 capture. All cases were compared to an integrated iron and steel reference case based on the BF + BOF route. Results show that replacing part of the blast furnace coke with increased PCI injection and replacing the gas boiler with a high efficiency gas turbine significantly reduces total CO2 emissions (up to 1.8 Mt/a) from the steel mill. The modified concept imposes significant changes in electricity production on site and becomes an important factor for steel producers operating in the national grids. The different concepts can be implemented stage wise, minimizing the investment and technology risks.
Original languageEnglish
Pages (from-to)163-171
JournalInternational Journal of Greenhouse Gas Control
Volume45
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Fingerprint

Iron and steel plants
Blast furnaces
mill
steel
combustion
gas
Calorific value
Carbon capture
Iron
Gases
Coke
iron
turbine
Gas turbines
Boilers
analysis
blast furnace
Coal
coal
Basic oxygen converters

Keywords

  • blast furnac
  • CCS
  • CO2 reduction
  • iron and steel
  • MEA
  • pre-combustion
  • selexol

Cite this

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title = "Staged implementation of alternative processes in an existing integrated steel mill for improved performance and reduced CO2 emissions. Part I: technical concept analysis",
abstract = "In this study, an alternative operational concept for the blast furnace has been evaluated for an integrated iron and steel mill. The integrated iron and steel mill evaluated was based on the blast furnace and basic oxygen furnace (BF + BOF) hot metal production route equipped with a gas boiler power plant for power production. The alternative assessed was increased pulverized coal injection (PCI) as reducing agent to the blast furnace. Accompanied with a higher rate of oxygen feed to the blast furnace, this reduces the coke consumption in the blast furnace and increases the blast furnace top gas calorific value. The increased calorific value enables combustion of the blast furnace top gas in a high efficiency gas turbine for power production. Combining this modified blast furnace concept with pre-combustion carbon capture will enable a reduction in the total CO2 emissions from the steel mill. Three concepts were evaluated: a modified blast furnace concept without carbon capture, a modified blast furnace concept with MEA-based pre-combustion CO2 capture and a modified blast furnace concept with Selexol-based pre-combustion CO2 capture. All cases were compared to an integrated iron and steel reference case based on the BF + BOF route. Results show that replacing part of the blast furnace coke with increased PCI injection and replacing the gas boiler with a high efficiency gas turbine significantly reduces total CO2 emissions (up to 1.8 Mt/a) from the steel mill. The modified concept imposes significant changes in electricity production on site and becomes an important factor for steel producers operating in the national grids. The different concepts can be implemented stage wise, minimizing the investment and technology risks.",
keywords = "blast furnac, CCS, CO2 reduction, iron and steel, MEA, pre-combustion, selexol",
author = "Kristin Onarheim and Antti Arasto",
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Staged implementation of alternative processes in an existing integrated steel mill for improved performance and reduced CO2 emissions. Part I: technical concept analysis. / Onarheim, Kristin (Corresponding Author); Arasto, Antti.

In: International Journal of Greenhouse Gas Control, Vol. 45, 2016, p. 163-171.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Staged implementation of alternative processes in an existing integrated steel mill for improved performance and reduced CO2 emissions. Part I: technical concept analysis

AU - Onarheim, Kristin

AU - Arasto, Antti

PY - 2016

Y1 - 2016

N2 - In this study, an alternative operational concept for the blast furnace has been evaluated for an integrated iron and steel mill. The integrated iron and steel mill evaluated was based on the blast furnace and basic oxygen furnace (BF + BOF) hot metal production route equipped with a gas boiler power plant for power production. The alternative assessed was increased pulverized coal injection (PCI) as reducing agent to the blast furnace. Accompanied with a higher rate of oxygen feed to the blast furnace, this reduces the coke consumption in the blast furnace and increases the blast furnace top gas calorific value. The increased calorific value enables combustion of the blast furnace top gas in a high efficiency gas turbine for power production. Combining this modified blast furnace concept with pre-combustion carbon capture will enable a reduction in the total CO2 emissions from the steel mill. Three concepts were evaluated: a modified blast furnace concept without carbon capture, a modified blast furnace concept with MEA-based pre-combustion CO2 capture and a modified blast furnace concept with Selexol-based pre-combustion CO2 capture. All cases were compared to an integrated iron and steel reference case based on the BF + BOF route. Results show that replacing part of the blast furnace coke with increased PCI injection and replacing the gas boiler with a high efficiency gas turbine significantly reduces total CO2 emissions (up to 1.8 Mt/a) from the steel mill. The modified concept imposes significant changes in electricity production on site and becomes an important factor for steel producers operating in the national grids. The different concepts can be implemented stage wise, minimizing the investment and technology risks.

AB - In this study, an alternative operational concept for the blast furnace has been evaluated for an integrated iron and steel mill. The integrated iron and steel mill evaluated was based on the blast furnace and basic oxygen furnace (BF + BOF) hot metal production route equipped with a gas boiler power plant for power production. The alternative assessed was increased pulverized coal injection (PCI) as reducing agent to the blast furnace. Accompanied with a higher rate of oxygen feed to the blast furnace, this reduces the coke consumption in the blast furnace and increases the blast furnace top gas calorific value. The increased calorific value enables combustion of the blast furnace top gas in a high efficiency gas turbine for power production. Combining this modified blast furnace concept with pre-combustion carbon capture will enable a reduction in the total CO2 emissions from the steel mill. Three concepts were evaluated: a modified blast furnace concept without carbon capture, a modified blast furnace concept with MEA-based pre-combustion CO2 capture and a modified blast furnace concept with Selexol-based pre-combustion CO2 capture. All cases were compared to an integrated iron and steel reference case based on the BF + BOF route. Results show that replacing part of the blast furnace coke with increased PCI injection and replacing the gas boiler with a high efficiency gas turbine significantly reduces total CO2 emissions (up to 1.8 Mt/a) from the steel mill. The modified concept imposes significant changes in electricity production on site and becomes an important factor for steel producers operating in the national grids. The different concepts can be implemented stage wise, minimizing the investment and technology risks.

KW - blast furnac

KW - CCS

KW - CO2 reduction

KW - iron and steel

KW - MEA

KW - pre-combustion

KW - selexol

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DO - 10.1016/j.ijggc.2015.12.008

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VL - 45

SP - 163

EP - 171

JO - International Journal of Greenhouse Gas Control

JF - International Journal of Greenhouse Gas Control

SN - 1750-5836

ER -