STUDY OF ELASTIC MECHANICAL
AND PHYSICOCHEMICAL PROPERTIES OF REFRACTORY OBJECTS
WITH THE AIM OF PREDICTING THE ENDURANCE
OF A NONFERROUS METALLURGY UNIT LINING
V. V. Slovikovskii
Translated from Novye Ogneupory, No. 10, pp. 17 – 21, October 2011.
Original article submitted June 27, 2011.
The construction of contemporary laboratory units, procedures for studying the elastic mechanical and
physicochemical properties of different composition, both original, and impregnated with molten slag-matte
of copper composition are developed with the aim of determining nonferrous metallurgy unit lining endur
ance,. The procedures developed using new laboratory devices making it possible to predict nonferrous metal
lurgy unit lining endurance with sufficient accuracy. On the basis of studies using the new procedures com
bined highly resistant linings are created and introduced for horizontal converters and a Waelz kiln for a num-
ber of nonferrous metallurgy enterprises.
Keywords: refractory object spalling, thermal stresses, linear thermal expansion coefficient, elastic mechani-
cal properties, matte, slag, sintered chromite-periclase and periclase-chromite refractories, refractories based
on a fuzed grain.
Failure of refractory objects due to the action of molten
agents occurs by successive wear of a working surface, as a
result of which the area of a working surface in contact with
melt has a marked effect on the results obtained. The amount
of wear is also determined by the time of melt action. There
fore, as a main property reflecting the capacity of refractory
objects to resist corrosive melts it is possible to present wear
rate C, m/h:
is hypothetical volume of refractory component,
which it occupies in a specimen before testing; V
is the same
after testing; S is the refractory surface working area in con
tact with a melt, m
; t is test time, h.
The main difficulties in evaluating slag resistance arise
in choice of wear criteria. The traditional slag resistance cri
terion, determined from specimen weight loss from a unit
area during a certain time, may be very approximate. The
scatter of indices for identical specimens after testing has
reached 200% or more.
In the procedure proposed by us for evaluating specimen
slag resistance a method is used in which the specimen vol
ume before and after testing was replaced by a hypothetical
volume, occupied by the main refractory component, for ex
, MgO, etc. Its volume was determined by
chemical analysis and wear rate was calculated by Eq. (1).
Testing was verified in a device developed by us (Fig. 1).
An advantage of this device construction over existing
devices is the fact that in order to increase test efficiency and
obtain more reliable results the rotary movement of a speci
men in a melt was supplemented b a curvilinear oscillatory
movement, as a result of which a specimen, stirring a melt,
averaged its corrosiveness.
The operating principle of the device involves the fol
lowing. A specimen 1 is installed in a holder 2, which is a
thick corundum tube cut in two. By contraction of clamps 3,
made of heat-resistant alloy, a specimen is squeezed forming
a rigid connected with shaft 4, joined through eccentric 5
with a reducing electric motor 6. Supply to the electric motor
is accomplished through an autotransformer, by means of
Refractories and Industrial Ceramics Vol. 52, No. 5, January, 2012
1083-4877/12/05205-0358 © 2012 Springer Science+Business Media, Inc.
FGAOUVPO URFU, Ekaterinburg, Russia.