CHANGE IN LINING CONSTRUCTION FOR A BLAST FURNACE
WITH A VOLUME OF 3000 m
DURING FIRST CATEGORY
A. M. Koverzin,
L. V. Portnov,
A. P. Presnyakov,
I. V. Rekhtin,
and A. D. Kraev
Translated from Novye Ogneupory, No. 8, pp. 12 – 15, August 2008.
Original article submitted April 25, 2008.
Blast furnace No. 1 of OAO West-Siberia Metallurgical Combine was shut down for first category major
overhaul on 06.15.2007. In putting out a tender for the choice of supplier of refractories for lining the blast
furnace a mandatory condition was use of a “ceramic shell” and provision of a furnace operating life of not
less than 20 years. Seven companies took part in the tender for the supply of lining refractories. The major
overhaul of blast furnace No. 1 was carried out in a record short time, i.e. the period from the instant of
shutdown to start-up was 107 days. Shortening of the repair time was promoted by use in the hearth (including
the tuyere zone) of lining previously assembled and inspected by the supplier. Use of high quality refractory
materials made it possible to increase the distance between the axes of the tap-holes and blast-furnace
bottom to 2.4 m.
Blast furnace No. 1 (BF-1) of OAO West-Siberia Metal-
lurgical Combine (ZSMK) was put into operation after its
reconstruction with an increased useful volume from 2000 to
in March 1976. as a result of reconstruction the
blast furnace obtained two casting yards and three tap-holes
(two for the right-hand yard and one for the left-hand yard).
A layout with use of the separating shute was used for the
Blast furnace No. 1 was shut down for a first category
major overhaul on 06.15.2007. The following specific con
sumption of refractory materials for the main shute was
achieved (not including the initial lining), kg/ton pig iron:
0.17 for main shutes Nos. 1, 2 and 4, 0.16 for main shute No. 3.
In putting out a tender for the choice of refractory suppliers
for blast furnace lining one of the main specifications was an
increase in lining life, and here a mandatory condition was
use of a ceramic lining (a ceramic shell). The furnace
operating life should not be less than 20 years until the next
first category major overhaul (the standard period is 15 years).
Seven companies took part in the tender for refractory
materials. The proposal from the company UCAR was
interesting about use in the hearth wall lining of hot-pressed
carbon brick grade NMA with a thermal conductivity of
17 W/(m·K) instead of carbon blocks. The main concept for
using small pieces is segmentation of the hearth wall lining
into a set of rings making it possible for the hot surface to
expand independent of its cold part, significantly reducing
internal stresses that give rise to crack development and
prevent heat transfer. Linear expansion of an individual small
brick is insignificant and easily compensated by cement
joints that reduces the occurrence of internal stresses. Use of
small objects also makes it possible to make the wall lining
thinner, and this reduces the resistance to heat transfer and
reduces the refractory surface hot temperature, promoting
better formation of a protective glaze layer.
However, in order that these advantages occur, it is
necessary to create dense contact of a carbon brick with the
cooling system, for which there is use of external irrigation
and compact fitting of the brick to the furnace casing. The
cooling system adopted for blast furnace No. 1 with cast iron
cooling plates makes it impossible to do this, and therefore
the proposal from UCAR was declined.
The following suppliers were decided from the tender
Gruppa Magnezit (producer Yaxing Carbon Materials,
Ltd., China) for graphitized, semigraphitized blocks;
OOO Univertorg (producer company SGL Carbon
Group, Poland) for supermicroporous carbon blocks; carbon
concrete grade RST 33/34;
OOO Variték (producer company Gongyi Central Plains
Refractory Co. Ltd., China) for ceramic lining or “ceramic
Refractories and Industrial Ceramics Vol. 49, No. 4, 2008
1083-4877/08/4904-0251 © 2008 Springer Science+Business Media, Inc.
OAO West-Siberia Metallurgical Combine, Novokuznetsk, Russia.