Cold Rolling - Reducing Losses on Annealing Line

Losses on the annealing line can be reduced by implementing heat recovery (using regenerative or recuperative burners in the annealing furnace), improved insulation, process management equipment, as well as installing variable speed drives. Compared to current state-of-the-art furnaces, a modern furnace with regenerative burners would still reduce fuel consumption by 25%, while NOx emissions would be reduced by 90% (Worrell et al., 2010. p. 105). 

Development Status Products
Commercial
Cold rolled steel

Cold Rolling - Reducing Losses on Annealing LineCosts & Benefits

Parent Process: Rolling Mills
Energy Savings Potential

 

Implementing loss reduction measures for a continuous annealing line, energy use can be reduced by up to 40-60% compared to furnaces without heat recovery (Worrell et al., 2010. p. 105).

Energy savings can amount to 0.3 GJ/t-product for fuel and 0.011 GJ/t-product for electricity (US EPA, 2010. p. 29).

CO2 Emission Reduction Potential

Emission reductions are estimated to be 17.5 kg CO2/t-product.

Costs

Investment costs in a plant in Netherlands were estimated to be $4.2/t-product. The payback time is estimated as 4 years (US EPA, 2010. p. 29).

Cold Rolling - Reducing Losses on Annealing Line 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: 

105