> News from 2014 2014 – Duisburg, ThyssenKrupp Steel 2014 TUB Technik GmbH ThyssenKrupp carries out a blast furnace lining of its blast furnace 2 at the Schwelgern plant. TUB Technik GmbH is commissioned to plan the overhaul work on the blast furnace cooling system and to supervise the installation.