A major investment programme is going on in the Sidmar steel plant. This programme will be
described briefly. One of the investments was the modernization of the primary dedusting
system of both BOF. The reason for this modification is twofold : reduction of the emissions
through the flare stack and increase of the oxygen flow rate. This paper describes the
existing equipment and all modifications made, the emission results and the very large
influence on the BOF cycle time (reduction from more than 31 to 28 min only) leading
to an important capacity increase of the BOF using a 1 out of 2 vessel operation.