NEW LOW- AND ULTRALOW-CEMENT REFRACTORY CONCRETES
PRODUCED BY OAO BOROVICH REFRACTORY COMBINE
FOR THE METALLURGICAL AND GLASS INDUSTRIES
A. P. Margishvili,
G. V. Rusakova,
I. A. Gvozdeva,
P. E. Alekseev,
and O. S. Kuznetsova
Translated from Novye Ogneupory, No. 3, pp. 121 – 126, March 2008.
Original article submitted December 25, 2007.
In the research center for improvement of technology and production (TsSTiP) OAO BKO a series of low- and
ultralow-cement concretes have been developed that are used successfully in both the metallurgical and glass
industries. Considerable success, achieved in creating new highly efficient unmolded refractories, is due to the
use of different raw materials that have high purity, fineness and chemical activity.
The sphere of application of the new generation of
concretes is constantly expanding, which is connected with
an increase in strength both at low and elevated tempe-
ratures, corrosion resistance, service temperature, and heat
resistance. The apparent necessity of producing and
introducing new forms of materials has made it possible to
embrace this niche in the market for refractories by such
well-known producers as Calderys Deutschland GmbH &
Co. (Germany), RHI AG (Austria) and others. Attempts to
start production in Russia of cement-free and low cement
refractory concretes has led to the situation that some
enterprises use 100% of imported components and only
change their packing. Other enterprises have entered the path
of cement technology using alumina and high-alumina
cements as a binder .
For matrix systems in the production of LCFC and
SLCFC both abroad and in Russia there is most widespread
use of synthetic high-alumina materials developed and
produced by Almatis (Germany) . However, use of
imported components leads to a marked rise in the price of
concretes, which with an increase in the use of unmolded
refractories in different branches of industry has a negative
effect on their economic efficiency.
In TsSTiP OAO BKO a series of materials has been
developed made of thixotropic mixes that are used suc
cessfully both in metallurgy and in the glass making industry.
Significant success achieved in creating new highly effective
unmolded refractories is due to a considerable extent to the
use of different raw materials that have increased purity,
fineness and chemical activity, and this concerns both matrix
systems and fillers for unmolded refractories.
In new low-cement concretes the matrix is a complex
system consisting of very fine powders various inorganic and
organic additions, i.e. regulators for rheological and
production properties of concretes . The physicochemical
characteristics of matrix grade BorIM 93 S produced by
OAO BKO is presented in Table 1.
In all matrix products the content of readily-melting com
ponents is less than 0.5 wt.%, and iron is less than 0.7 wt.%.
Refractories and Industrial Ceramics Vol. 49, No. 2, 2008
1083-4877/08/4902-0111 © 2008 Springer Science+Business Media, Inc.
OAO Borovich Refractory Combine, Center for the Improvement
of Technology and Production, Russia.
TABLE 1. Physicochemical Characteristics of Matrix BorIM 93 S
BorIM 93 S*
Matrix of leading
Chemical composition, wt.%:
Content of grains with a size of
less than 0.045 mm, %
Actual indices are in the numerator, standard indices in the
Overall content of Al
+ MgO shown.