He declined to say either which of IJmuiden’s two furnaces – BF 6 or BF 7 – would undergo a refractory reline or when in the year. He noted the company needs to speak with customers to determine their needs before deciding when exactly to blow down.
Pre-engineering work at Tata Steel Netherlands
A blast furnace must continuously operate in campaigns, which normally last 15-20 years as deactivating it can create cracks in the refractory lining. Even when not on stream, blast furnaces must maintain a certain temperature to keep their refractories’ integrity.
Campaigns can also be as long as 30 years in some cases.
Pre-engineering work for the refractory reline at IJmuiden is now under way, the source said. The source added that this could include producing needed parts and acquiring necessary supplies.
“Many of these items you have to order months or even years in advance,” the source added.
IJmuiden’s two blast furnaces can produce approximately 6 million metric tons per year of pig iron. BF 6 has a capacity of 2.5 million metric tons and a hearth diameter of 11 meters. Meanwhile, BF 7’s hearth diameter is 13.8 meters with a pig iron capacity of 3.5 million metric tons.
The plant produced 6.2 million metric tons of crude steel in the financial year ending March 31, 2021. That marked a drop of 8.8% from 6.8 million metric tons in the previous year, parent company Tata Steel Group stated in its annual report released in May.
TKS relines blast furnace at Duisburg
Further east, flats producer ThyssenKrupp Steel (TKS) is now relining one of its four blast furnaces at its Duisburg site in a project that is to last through September, a spokeswoman for the German steelmaking group told MetalMiner.
Work to reline blast furnace No. 1 started in July as the furnace had ended its campaign of 15-20 years, the spokeswoman said.
She referred to the work as a “partial reline,” however, as the furnace’s body is due to remain intact.
Blast furnace No. 1 can produce 3.5 million metric tons per year of pig iron and has a hearth diameter of 13.5 meters. Annual pig iron capacity from TKS’ four blast furnaces is about 10 million metric tons.
TKS also relined BF 2 in 2014, BF 9 in 2013 and BF 8 in 2007, the spokeswoman told MetalMiner.
The spokeswoman did not specify how much the refractory reline work would cost, but noted that “the investment for the project amounts to a medium double-digit million euros amount.”
Refractory lining requires special, heat-resistant bricks that can safely hold molten pig iron as well as slag, and thus carry a premium cost.