Division 92

BAT is to minimise the waste water discharge from continuous casting by using the following techniques in combination:

1. I..

   the removal of solids by flocculation, sedimentation and/or filtration

2. II..

   the removal of oil in skimming tanks or in any other effective device

3. III..

   the recirculation of cooling water and water from vacuum generation as much as possible.

The BAT-associated emission levels, for waste water from continuous casting machines, based on a qualified random sample or a 24-hour composite sample, are:

— suspended solids

< 20 mg/l

— iron

< 5 mg/l

— zinc

< 2 mg/l

— nickel

< 0,5 mg/l

— total chromium

< 0,5 mg/l

— total hydrocarbons

< 5 mg/l