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.  

Chinese flag Indian flag US flag 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
Commercial

Oxyfuel Burners/LancingCosts & Benefits

Parent Process: Electric Arc Furnace
Energy Savings Potential

2–3 kWh/t-steel of energy can be saved for every minute of heating time reduced;
Electricity savings 0.14GJ/t-steel, with typical oxygen injection rates of 18 Nm3/t-steel.(APP, 2010. p. 80).

CO2 Emission Reduction Potential

US flag Emissions can be reduced by 23.5 kg CO2/t-steel.

Costs

Retrofit capital cost for a 110t capacity EAF is $4.8/t.
Due to reduced tap-to-tap time of around 6%, annual savings of $4/t have been realized (APP, 2010. p.80).

Parent Process:
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

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.

Page Number: 

92

The State–of-the-Art Clean Technologies (SOACT) for Steelmaking Handbook

 

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. 

Page Number: 

80

Page Number: 

83-102