Selective Waste Gas Recycling - EPOSINT Process

Selective gas recycling in the Environmentally Process Optimized Sintering (EPOSINT) uses the fact that the release of particulate matter from the sinter bed tend to be more concentrated in those wind boxes that are situated towards the discharge end of the sinter strand where the waste gas temperature shows rapid rise. These windboxes are selected for waste gas recycling where the burn-through is at or near the bottom of bed. EPOSINT process allows selective diversion of waste gases from individual wind-boxes towards the end fo the sinter strand.  This technology reduces the off-gas volume by up to 40%, saves energy and coke, increases productivity, and significantly reduces emissions (IPPC, 2012, p. 175).

Development Status Products

Selective Waste Gas Recycling - EPOSINT ProcessCosts & Benefits

Parent Process: Sinter Plant
Energy Savings Potential

Coke conusmption and ignition gas consumption is reduced by 2 - 5 kg/t-sinter and 10 MJ/t-sinter, respectively. Electricity consumption increases.  

CO2 Emission Reduction Potential

The technology reduces Up to 40% Off-gas volume. Abatement potential of specific NOx emissions is about 25 - 30%.


A plant with existing waste gas system and a suction area of 250 m2 was retrofitted for €15 million.  

In 2007 the system was installed in two sinter plants in Belgium with suction areas of 175 and 498 m2 at a cost of €14 million and €27.3 million, respectively. 

Selective Waste Gas Recycling - EPOSINT ProcessSchematic

Selective Waste Gas Recycling - EPOSINT Process Reference Documents

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