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Improved environment at Salzgitter thanks to new sintering off-gas treatment plant
Mar 2, 2011
In December 2008, Salzgitter Flachstahl GmbH (SZFG) decided to equip the sinter plant of their Salzgitter works (Lower Saxony, Germany) with a flue gas treatment plant in order to meet the stringent conditions of the German “TA Luft” environmental legislation.
The flue gas desulphurization technology utilizes an entrained flow absorber with hydrated lime and lignite coke as reagents; thus, hydrochloric and hydrofluoric acids and others are bound in addition. These reactions are followed by bag filter dry cleaning of the gas, down to extremely low dust content.
Sintering plant A at Salzgitter has a suction area of 180 m² and is typically operated at productivities over 40 t/m²×24 h generating 500.000 m³(STP)/h (dry) off-gas which is pre-cleaned by an electrostatic precipitator.
The off-gas treatment plant was commissioned March 2010. SZFG reports that the dust content of the released clean gas is now less than 3 mg/m³ (STP) average; the concentration of other emissions are according to actual TA-Luft limitations. The consumption figures of the reagents appear to be at the expected level.
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