Salzgitter Flachstahl Furnace B was built in 1993 on a green field site, and its hearth diameter is 11.2 m with a working volume of 2,530 m3. The design capacity for this furnace is 6,000 mt/HM/day. The furnace is equipped with two tapholes at an 84 degree angle in one cast house, and the furnace operated for 2 weeks with one taphole after which it changed over to the other taphole for the same period. The first campaign, from 1993, lasted eleven years, and the furnace produced about 19 million tons of hot metal. The original 1993 hearth lining was a micropore block construction, and at the end of the campaign the carbon lining was only 50 mm in some places.

For the second campaign, starting in 2004, Salzgitter AG replaced the old micropore block carbon hearth and changed to the UCAR® lining system, which uses HotPressed™ carbon bricks. The furnace was blown-in with all the tuyeres open and within 4 days productivity exceeded 5,000 mt/HM/day. For the last 10 years the UCAR lining has performed well without any need of repair and with no significant wear of the carbon lining.

After the production of more than 20 million tons of hot metal, Salzgitter AG plans to refurbish furnace B in 2015. As a part of the refurbishment they will install a new refractory lining in the furnace. Based on their experience with the superior performance of UCAR's HotPressed bricks over the last 10 years, Salzgitter AG has decided to install a complete UCAR hearth lining, including hearth pad, hearth walls, tuyere band and lower bosh for the 2015 refurbishment. The delivery of the graphite, carbon and hot-pressed carbon bricks is scheduled for the end of 2014 and installation will take place in 2015.