EVRAZ Group is to build a seventh blast furnace at its NTMK facility in Nizhnij Tagil, Russia.
The new furnace will be of similar design to the existing BF5 and BF6 furnaces with a hearth diameter of 9.8 metres, an inner volume of 2,200 cubic metres, 22 tuyeres and 2 tap holes, each unit can produce 2.5Mt of hot metal per year.
EVRAZ plans to commission the new BF 7 in 2018. The new ironmaking plant configuration will allow full steel production even during periodical repairs of the site’s blast furnaces.
“Contracts have now been signed by EVRAZ-NTMK and Paul Wurth for the design and supply of technology and key equipment which will ensure reproducible operations and support a long campaign for this modern furnace,” said Paul Wurth. “This includes a parallel hopper Bell Less Top charging system, a hearth refractory lining with a ceramic cup and two sets of fully hydraulic tapping machinery.”
According to Paul Wurth, vertical copper stave coolers in the high-heat loaded bosh, belly and stack area – the same configuration as the plant’s BF5 and BF6 since 2004 – will repeat their successful application in an evaporative cooling system. The BF top gas cleaning plant with axial cyclone and annular gap scrubber as well as the de-dusting systems for stockhouse and casthouse will ensure minimal environmental impact and a maximum material return to the main process of steelmaking.