Blast Furnace № 5 (“Severyanka”)
was blown–in on April 12, 1986, the first iron was tapped on April 13, 1986.
The construction of Blast Furnace № 5 was declared to be the All–Union Komsomol
In designing of almost 250
facilities of the blast furnace complex about 40 design institutes have taken
part, and the general designer – “Lengipromez” was among them. More than 13
thousand builders and erectors were engaged in the blast furnace construction.
In the course of construction
more than 160 thousand tons of steel structures were erected, 78 thousand tons
of equipment were installed, over 200 thousand cubic meters of precast
reinforced concrete were placed, 520 thousand cubic meters of cast–in–situ
reinforced concrete were poured, over 30 kilometers of
railway tracks were laid.
At the moment of commissioning
and later, in the course of nearly twenty years, “Severyanka” remained the
largest blast furnace in the world. The giant blast furnace was put down into
the Guinness Book of Records. Today BF № 5 is the largest blast furnace in Europe. The working volume of BF № 5 is 5580 m3. The
height of the furnace central assembly is 105 meters. To provide
the blast furnace operation 1 million and 700 thou. tons of coke, approximately
2 million tons of pellets and over 4 million tons of sinter are required
annually. The design furnace capacity is up to 4 million tons per year.
“Severyanka” satisfies nearly 50 % of the Cherepovets Steel Mill iron requirements.
During the period of operation
two major overhauls of the 1st category were carried out at the
“Severyanka” blast furnace in the course of which a great complex of updating
works was implemented: the hydraulic machines for the iron tapholes were
installed, the automatic process control system was renewed, the aspiration system
For the last major overhaul of
the 1st category Blast Furnace № 5 was stopped in June of 2006.
“Lengipromez” was entrusted to prepare the design documents again.
In the process of reconstruction in 2006 the blast
furnace shell was replaced partially while the cooling system was changed
completely. In addition to the iron the granulated slag is produced also at BF №
5 (it is produced at a special slag granulation plant from the blast furnace
waste – slag).