KINETICS OF FUZED PERICLASE WETTING WITH COAL-TAR PITCH
G. A. Lysova
and S. I. Borovik
Translated from Novye Ogneupory, No. 6, pp. 39 – 42, June, 2016.
Original article submitted December 28, 2015.
Results are given for a study of the mechanism of periclase wetting by coal-tar pitch. Features are revealed for
pitch reaction with a periclase surface caused by differences in pitch chemical composition and conversion of
components during thermal action.
Keywords: pitch, kinetics, wetting, periclase, adhesive.
Currently contemporary refractory material manufactur
ing technology for high quality carbon-containing refractory
material is being successfully assimilated. A considerable
proportion of the contemporary refractory market comprises
carbon-containing refractories. This is due to a set of unique
carbon properties, i.e., high refractoriness, thermal conduc-
tivity, electrical conductivity, chemical resistance with re-
spect to melts based on the majority of metals both in oxi-
dized and reduced forms, low linear thermal expansion coef-
ficient (LTEC), etc. (.
The carbon components used as combined action addi
tives (antioxidizing additions, pitch, resins, graphite) whose
purpose is protection of a coke carcase structure from oxida
tion are liquid phenol binder with a high proportion of car
bon residue, carbon fibers, providing three-dimensional vol
umetric strengthening and an increase in material life, etc.
The most widespread and promising carbon additives are
medium- and high-temperature pitches.
In the authors’ opinion in multicomponent systems con
taining a refractory filler carbon ingredients create produc-
tion problems with uniform and arbitrary distribution of
them within the volume of a mixture, causing changes in
physicochemical properties of the masses formed as ingredi-
ents interact and leading to deterioration of physicotech-
nological properties of refractory materials .
As a carbon additive to a binder it is possible to use coal
tar pitch that similar to a phenol binder, during refractory ma-
terial preparation there is a stage of a liquid-mobile condi-
tion, and it reacts with filler surface. Therefore a study of the
wetting capacity of periclase by carbon binders is of specific
The aim of the work is to study process kinetics for wet
ting the surface of fuzed periclase with coal tar pitches. The
objects studied were medium- and high-temperature coal tar
pitches differing in original raw material, preparation
method, and properties (Table 1).
Pitch is specified by group composition with respect to
solubility in organic solvents: a g-fraction indicates presence
within pitch of the least aromatized structures and its
plastifying properties; an a-fraction is the least condensed
Refractories and Industrial Ceramics Vol. 57, No. 3, September, 2016
1083-4877/16/05703-0304 © 2016 Springer Science+Business Media New York
FGBOU South-Ural State University, Chelyabinsk, Russia.
TABLE 1. Coal-Tar Pitch Properties
Yield of volatile
Substance content, %
soluble in iso-octane
insoluble in toluene
insoluble in quinoline
1 70 64 37.9 30.0 10.8 1.32
2 145 48 24.3 45.2 15.2 1.34
3 112 56 39.9 34.8 8.6 1.32