Emissions Optimized Sintering

The Emissions Optimized Sintering (EOS) is a process developed in the 1990s where the entire entire sinter strand is housed and waste gases from the entire strand are recirculated back to the entire surface of the strand. The recycling rate of the waste gas is in the order of 40 to 45 percent resulting in a 45 to 50 percent decrease in the amount of waste gas emitted to the atmosphere (IPTS/EC, 2013 p. 168). The process allows for using the CO content of the waste gas as an energy source, minimizes off-gas volumes and thereby reduces off-gas cleaning investments, and saves energy through reduced coke consumption.  The technique also allows for reducing operational costs and significantly reduces NOx, SOx, CO and CO2 emissions (Worrell et al., 2010. p. 76).

EOS may require substantial modifications on existing plants.  The technology is regarded to have application potential in China, India and the US. 

Development Status Products
Commercial
sinter

Emissions Optimized SinteringCosts & Benefits

Parent Process: Sinter Plant
Energy Savings Potential

EU Flag In a plant in Netherlands, installation of EOS reduced coke breeze consumption by 12 kg/t-sinter (20% reduction).  Lower reductions (~ 6kg/t-sinter) are to be expected in plant running at higher baseline efficiencies. The system increased electricity consumption by 3 - 8 MJ/t-sinter (IPPC, 2009. p. 177). 

CO2 Emission Reduction Potential

EU Flag In a plant in Netherlands, CO2 emissions were reduced by 31% with the use of this technology (IPPC, 2009. p. 177). 

Costs

Investment cost at sinter plant of Corus, Ijmuiden was €17 million with 1.2 MNm3/h waste gas flow from three sinter strands. The technology provided yearly savings of €2.5 million. (Lower savings are estimated in other parts where the coke breeze costs are lower).

Parent Process:
Energy Savings Potential
CO2 Emission Reduction Potential

N/A

Costs

Emissions Optimized SinteringSchematic

Emissions Optimized Sintering 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.

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