The U.S. Environmental Protection Agency’s (EPA) energy guide, Energy Efficiency Improvement and Cost Saving Opportunities for the U.S. Iron and Steel Industry, discusses energy efficiency practices and technologies that can be implemented in iron and steel manufacturing plants. This guide provides current real world examples of iron and steel plants saving energy and reducing cost and carbon dioxide emissions.
Oxyfuel Burners/Lancing
Oxy-fuel burners can be installed in EAFs by partially substituting electricity with oxygen and hydrocarbon fuels. While also reducing the energy demand, these burners increase the effective capacity of the furnace by increasing the speed of the melt and reduce the consumption of electrode material. Additional temperture homogeneity benefits can be obtained by directing the heat to the cold spots in the furnace. Moreover, the injection of oxygen helps to remove different elements from the steel bath, like phosphorus, silicon and carbon. Steelmakers are now making wide use of stationary wall-mounted oxygen-gas burners and combination lance-burners, which operate in a burner mode during the initial part of the melting period. When a liquid bath is formed, the burners change over to a mode in which they act as oxygen lances. Natural gas, oil and other hydrocarbons are also used in oxy-fuel burners.
Oxyfuel burners may increse the total exhaust gas volume and the amount of unburned constituent content in the flue gas. This technology is regarded to have high application potential in China, India, and the US.
Development Status | Products |
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Commercial
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Oxyfuel Burners/LancingCosts & Benefits
Parent Process: Electric Arc Furnace | |
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Energy Savings Potential |
2–3 kWh/t-steel of energy can be saved for every minute of heating time reduced; |
CO2 Emission Reduction Potential |
Emissions can be reduced by 23.5 kg CO2/t-steel. |
Costs |
Retrofit capital cost for a 110t capacity EAF is $4.8/t. |
Parent Process: | |
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Energy Savings Potential | |
CO2 Emission Reduction Potential |
N/A |
Costs |
Oxyfuel Burners/Lancing Publications
Energy Efficiency Improvement and Cost Saving Opportunities for the U.S. Iron and Steel Industry
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The State–of-the-Art Clean Technologies (SOACT) for Steelmaking Handbook
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The State–of-the-Art Clean Technologies (SOACT) for Steelmaking Handbook is developed as part of the Asia-Pacific Partnership on Clean Development and Climate program and seeks to catalog the best available technologies and practices to save energy and reduce environmental impacts in the steel industry. Its purpose is to share information about commercialized or emerging technologies and practices that are currently available to increase energy efficiency and environmental performance.
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Available and Emerging Technologies for Reducing Greenhouse Gas Emissions from the Iron and Steel Industry
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Oxyfuel Combustion in the Steel Industry: Energy efficiency and decrease of CO2 emissions
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This book chapter prepared by Joachim von Schéele of The Linde Group provides an overview of energy efficiency and CO2 reduction potentials offered by the use of oxyfuel technologies in steel industry. The chapter is part of an open source book titled "Energy Efficiency", edited by Jenny Palm.