PRODUCTION AND EQUIPMENT
DEVELOPING REFRACTORY CONCRETES OF ALUMOSILICATE-
AND ALUMINA-BASED COMPOSITIONS FOR HIGH-TEMPERATURE
EQUIPMENT IN FERROUS METALLURGY
I. D. Kashcheev,
S. A. Pomortsev,
and A. A. Ryaplova
Translated from Novye Ogneupory, No. 7, pp. 15 – 18, July, 2014.
Original article submitted May 16, 2014.
Results are presented from the development of a new series of low-cement concretes for use under different
conditions in high-temperature equipment employed in ferrous metallurgy. The concrete mixtures are made
with the use of a wide range of fillers — from fused corundum to fireclay. The service temperature of the con
cretes is within the range from 1450 to 1750°C, the specific temperature depending on the composition of the
filler. The concretes do not soften during heating and have excellent quality characteristics. Their practical ap-
plication in high-temperature equipment and ladles used to transport molten metal at the Magnitogorsk Metal-
lurgical Combine has demonstrated their durability in service.
Keywords: low-cement concretes, concrete mixtures, filler, high-alumina cement (HAC), corrosion resis-
tance, slag resistance.
One promising trend in refractories production here and
abroad is the fabrication of products and linings composed of
dry concrete mixtures. Refractory concretes account for
roughly 25% of all of the refractory products made in Russia
. The OOO “Ogneupor” is increasing its output of
vibrocast refractory concretes, which are the equal of equiva
lent imported concretes in terms of their quality characteris
tics and service properties. Ogneupor has been working on
the development of low-cement concretes since 2010, such
concretes making it possible to use a different refractory
filler without compromising the finished product’s high-tem
perature properties. Having a low cement content in concrete
minimizes the adverse effect of the processes which take
place during the hardening of cement. In traditional con
cretes, these processes are the reason for the existence of the
so-called “softening range.” The technical and economic
benefits of using low-cement concretes is helping them to
find a wide range of applications in all types of metallurgical
operations [2, 3]. That range is also continually expanding, a
development which is related to a number of important ad-
vantages and capabilities that these products possess: [2, 3]:
– good resistance to corrosion and deformation, since
the CaO content of low-cement concrete is considerably
lower than that of conventional concretes;
– greater high-temperature and low-temperature
strength than conventional concretes;
– a fine-pore structure, which improves heat resistance
due to the larger total number of fine pores in the concrete.
The pores also slow the growth of microcracks early in their
The continually increasing demand for quality
refractories is motivating manufacturers to upgrade their
equipment and make use of new types of raw materials to
make their products. Ogneupor introduced a modern auto
mated line to produce dry refractory mixes in 2013, the line
being equipped with mixers made by the “Eirich” company.
The mixers’ operation includes batching and quality mixing,
as well as the introduction of highly dispersed special addi
tives into the mixture. This significantly improves the quality
of the final product. The line also includes electronic weigh
batchers and a hopper gantry designed to accommodate
mixes with a large number of components. The mixes are
Refractories and Industrial Ceramics Vol. 55, No. 4, November, 2014
1083-4877/14/05504-0281 © 2014 Springer Science+Business Media New York
Ural Federal University, Ekaterinburg, Russia.
OOO “Ogneupor,” Magnitogorsk, Russia.