Bottom Stirring/Stirring Gas Injection

This technique consists of injecting an inert gas in the bottom of the EAF to increase the heat transfer in the melt. In addition, increased interaction leads to an increased liquid metal yield of 0.5%. Furnaces with oxygen injection are sufficiently turbulent, reducing the need for inert gas stirring.

Development Status Products
Commercial
EAF Steel

Bottom Stirring/Stirring Gas InjectionCosts & Benefits

Parent Process: Electric Arc Furnace
Energy Savings Potential

Electricity savings can vary between 12 to 24 kWh, or 0.07 GJ, per ton of steel. 
CO2 Emission Reduction Potential

Emissions saving potential of the technology is 11.7 kg CO2/t-steel.
Costs

Retroftit capital cost is $0.94/t-steel.

Bottom Stirring/Stirring Gas Injection Publications

Energy Efficiency Improvement and Cost Saving Opportunities for the U.S. Iron and Steel Industry

Date: 

Oct
2010

Source: 

United States Environmental Protection Agency

Format: 

PDF

Type: 

Publications

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.

http://www.energystar.gov/ia/business/industry/Iron_Steel_Guide.pdf?25eb-abc5

Page Number: 

93

Available and Emerging Technologies for Reducing Greenhouse Gas Emissions from the Iron and Steel Industry

Date: 

Oct
2010

Source: 

United States Environmental Protection Agency

Format: 

PDF

Type: 

Publications
http://www.epa.gov/nsr/ghgdocs/ironsteel.pdf

Page Number: 

11