COMPOSITION, STRUCTURE, AND PROPERTY FORMATION
OF HEAT INSULATION FIRE- AND HEAT-REFLECTING MATERIALS
BASED ON VERMICULITE FOR INDUSTRIAL POWER GENERATION
V. T. Shmuradko,
F. I. Panteleenko,
O. P. Reut,
E. F. Panteleenko,
and N. V. Kirshina
Translated from Novye Ogneupory, No. 8, pp. 39 – 44, August, 2012.
Original article submitted February 28, 2012.
Within the scope of the problem of a composition – structure – property material formula, phase composition,
structure, physicomechanical, and thermophysical properties are developed and studied for heat insulation
materials based on thermally expanded vermiculite. Concepts are formulated for multilevel structural engi
neering of heat insulation fire- and heat-reflecting materials, within which at the level of material and produc
tion models conditions are realized for creating planned property indices for granules of thermally-expanded
vermiculite, consolidation regimes in continuous granular-porous structures in terms of cement-, clay-, and
water glass, and other binder systems, strengthened with ceramic fibers, and not requiring high-temperature
hardening. Graded self-strengthening multilevel structures are provided by working regimes of heating units
during their operation.
Keywords: composition, structure, properties, thermally expanded vermiculite, granules, binder, granule
technology and heat insulation material, object, testing, exploitation.
In view of the growing shortage of energy once more
there is an increase in the demand for and use of highly effi-
cient heat-reflecting materials based on granulated thermally
expanded vermiculite (TEV), consolidated with organic and
State of the problem. The contemporary trend in develop
ment of overall energy policy within enterprises is connected
with a change-over from an energy expenditure principle of
economic development to accounting and management of
heat and energy for industrial production through creation of
energy- and resource-saving technology. As applied to pro
duction of a broad range of heat insulation materials the main
priority of development remains that of using effective un
fired technology for preparing high-strength materials.
In creating highly porous refractory and heat insulation
materials two problems are resolved, i.e., production and
economic. On one hand, they supplement each other from
the point of view of economic expediency of creating low-
energy and resource-saving technology and production of
materials and objects made from thermally expanded ver
miculite, chamotte, and argillaceous minerals, and on the
other hand they are aimed at effective implementation of
Promising technology and materials based on vermicu
lite are primarily products that apart from quite high fire- and
thermal-stability exhibit high sound absorption indices, heat
insulation, and a prolonged operating life. We consider the
physicochemical characteristics of vermiculite.
Vermiculite mineral is an aqueous magnesia aluminosili
cate with a variable oxide content. It is chemically neutral,
inert, and pH ~ 7. The overall chemical formula is
()[()Mg ,Fe ,Fe SiAl O ]OH 4H O
2+ 2+ 3+
it is a hydrated mica of variable chemical composition, wt.%
: MgO 6 – 30, SiO
33 – 39, Al
12 – 18, FeO and Fe
6 – 19, depending on the deposit. The chemical composition
of vermiculite does not change during thermal expansion,
and only chemically bonded water is removed.
Comparatively good heat insulation properties for TEV
and materials based on it give rise to their effective use in
thermal power engineering, metallurgy, industrial and civil
Refractories and Industrial Ceramics Vol. 53, No. 4, November, 2012
1083-4877/12/05304-0254 © 2012 Springer Science+Business Media New York
OKhSP Scientific-Research Institute of Pulsed Processes with
Test production, GNU Institute of Powder Metallurgy, NANB,
Minsk, Belarus Republic.
Belarus National Technical University, Minsk, Belarus Republic.
Institute of Higher Qualification and Retraining of Personnel for
New Areas of Developing Engineering, Technology and Eco
nomics of the Belorussian National University, Minsk, Belarus