Division 75

BAT for basic oxygen furnace (BOF) gas recovery by suppressed combustion is to extract the BOF gas during blowing as much as possible and to clean it by using the following techniques in combination:

1. I..

   use of a suppressed combustion process

2. II..

   prededusting to remove coarse dust by means of dry separation techniques (e.g. deflector, cyclone) or wet separators

3. III..

   dust abatement by means of:

   1. (i)

      dry dedusting (e.g. electrostatic precipitator) for new and existing plants

   2. (ii)

      wet dedusting (e.g. wet electrostatic precipitator or scrubber) for existing plants.

The residual dust concentrations associated with BAT, after buffering the BOF gas, are:

• 10 – 30 mg/Nm³ for BAT III.i

• < 50 mg/Nm³ for BAT III.ii.