Improvement Of The Performance Of The Bosh Cooling System Of Rogesa No. 5 Blast Furnace

Rogesa is operating two medium sized Blast Furnaces, No. 4 and No. 5 at Dillinger integrated steel works plant. The history of the results of the cooling concepts of the intersection between tuyère belt and bosh shows failures at both furnaces. At the 3rd reline of No. 5 Blast Furnace in 2010 changes were made to improve the cooling efficiency of the mentioned area. Two rows of copper cooling plates were installed. After commissioning and a short operating time hot spots occurred in the area of the cooling plates. The decision was taken to develop a new cooling concept together with Paul Wurth Umwelttechnik GmbH, Essen-Germany by replacing the cooling plates by one row of a short copper stave. The duration of the shutdown to perform the work was only 17 days including salamander casting. The operational results after the commissioning are very satisfying with outstanding performance of the new bosh cooling system.