Paul Wurth technologies in use in new Russian blast furnace

In 2016, EVRAZ Group of Russia has decided to build a new blast furnace for developing and balancing their hot metal and steel capacities at EVRAZ-NTMK, Nizhny Tagil. This new ironmaking unit became No. 7 BF at this site. It is of similar design as the existing No. 5 and No. 6 furnaces which have been completely rebuilt and modernised in 2004-2006. The new furnace has been put in operation on the 28th of February, 2018. At hearth diameters of 9.8 meters and inner volumes of 2,200 cubic meters, with 22 tuyeres and 2 tapholes, each unit can produce 2.5 million tons of hot metal per year. Thus, the EVRAZ-NTMK blast furnaces are some of the ironmaking units with the highest productivity worldwide. The new ironmaking plant configuration will allow full steel production even during periodical repairs of the one or other of the blast furnaces.

As per contracts concluded with EVRAZ-NTMK, Paul Wurth has designed and supplied technology and key equipment which will ensure reproducible operations and support a long campaign for No. 7 blast furnace. This includes a parallel hopper Bell Less Top® charging system, tuyere stocks, the hearth refractory lining with a ceramic cup and two sets of fully hydraulic tapping machinery. As shown at NTMK’s No. 6 and No. 5 furnaces since 2004, vertical copper stave coolers in the high-heat loaded bosh, belly and stack area 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 Paul Wurth’s combined de-dusting system for stockhouse and casthouse ensure a minimum of environmental impact and a maximum of possible material return to the main process route.

With the aim of a record 18-month construction period, EVRAZ-NTMK strictly followed a very tight overall project schedule which had to be matched by the systems and equipment suppliers. Paul Wurth’s international project team made it possible to fully satisfy the customer’s expectations in this regard.

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