PRODUCTION AND EQUIPMENT
MANUFACTURE OF COMPLEX SHAPE REFRACTORY OBJECTS
BY VIBRATION CASTING
P. M. Pletnev,
D. S. Tyul’kin,
and V. A. Bogdanov
Translated from Novye Ogneupory, No. 10, pp. 8 – 12, October, 2013.
Original article submitted May 21, 2013.
Technology is developed for manufacturing corundum refractories and refractory fittings (objects) used in
production of engineering ceramics. Compositions of corundum ceramics, prepared on the basis of
polyfraction electromelted corundum, alumina, and high-alumina cement, exhibit high thermomechanical sta
bility up to 1700°C. Vibration casting is used to manufacture large refractory objects of complex shape. The
thermomechanical stability of specimens, and manufacturing approval of the compositions and technology
developed, are evaluated.
Keywords: corundum refractories, high-alumina cement, vibration compaction, alumina, finely-ground
With development of highly technological fields of in-
dustry within Russia ceramic objects for functional purposes
are playing a greater role, and for the majority of them their
production processes are connected with a high temperature.
In order to produce them it is necessary to use refractory
equipment for synthesizing materials and firing objects. Re
fractory equipment is of various sizes and configurations.
The size and shape of refractory equipment used in construc
tion of fired objects are individual. With firing objects alumi
num oxide ceramic is most widespread, whose firing temper
ature is 1650 – 1750°C, and refractory equipment is neces
sary capable of withstanding without breakage a charge of
objects being fired at a prescribed temperature with the max
imum number of firing cycles. Currently there is no domestic
production of this refractory equipment, and manufacturing
enterprises of engineering ceramics have to use expensive
imported refractory products while simultaneously carrying
out scientific research for compositions and technology for
refractory equipment manufactured internally.
Work carried out in recent years in this area for preparing
mullite-corundum and corundum-mullite refractories based
on domestic raw material [1, 2] make it possible to resolve
the problem of equipping ceramic manufacture with a num-
ber of refractory components of simple configuration, oper-
ating up 1500 – 1550°C. The current study was undertaken
with the aim of satisfying the demands of ceramic production
for refractory components of complex shape, operating at a
higher temperature (above 1600°C).
Preparation of objects of complex configuration in the
form of saggers, and shaped props, present significant pro
duction difficulties, connected primarily with their shape for
mation. Of the known molding methods for ceramic objects
there is practical interest in the method of vibration compac
tion, based on the thixotropic properties of a concrete mix.
The method makes it possible to manufacture high-tempera
ture components of considerable size of complex configura
tion, whose preparation by semidry compaction is expensive
and occasionally technologically impossible .
Depending on refractory service conditions it is possible
to use various forms of cement as a binding concrete mix, in
cluding alumina cement .
Alumina cement (AC) is distinguished from other forms
of cement by high refractoriness, low shrinkage during hard
ening, a short setting time, and considerable strength after
Refractories and Industrial Ceramics Vol. 54, No. 5, January, 2014
1083-4877/14/05405-0353 © 2014 Springer Science+Business Media New York
FGBOU VPO Siberian State University of Communications, No
Holding Company OAO NÉVZ-Soyuz, Novosibirsk, Russia.