NON-DESTRUCTIVE MONITORING OF THE STRUCTURE
OF CHAMOTTE GLASS BEAM ShSU-33
V. P. Migal’,
T. L. Derkunova,
I. G. Belova,
B. P. Aleksandrov,
I. N. Efimova,
V. V. Borisenko,
and A. S. Bogachev
Translated from Novye Ogneupory, No. 11 pp. 49 – 52, November 2009.
Original article submitted September 16, 2009.
It is shown that use of a multichannel USD-60-5 defectoscope makes it possible to reduce considerably the
time for monitoring a single refractory object. It is established that with a relative amplitude of more than 50%
a glass beam grade ShSU-33 in the measurement zone has physical indices exceeding the standard specifica
tion. Results are given for statistical treatment of measurements of a fired glass beam ShSU-33 by a Bstat pro
Keywords: non-destructive monitoring of refractories, ultrasonic monitoring, chamotte objects, multichannel
defectoscope, high-volume monitoring.
In the refractory industry there is work for finding meth-
ods for revealing concealed defects without breaking objects.
The most acceptable appears to be ultrasonic monitoring
methods for chamotte, corundum, periclase objects and those
of refractory concretes [1, 2; GOST 24830]. A radio-wave
method has been used for quartz ceramics and other refrac-
tory objects [3 – 6], an acoustic method of induced vibrations
has been used for chamotte objects [7; GOST 25714].
Methods for measuring the natural vibration frequency with
induced resonance and free vibrations have been applied in
abrasive production and in the refractory industry [8 – 10;
GOST 25961]. Use of non-destructive monitoring of
refractories has been described in publication . However,
non-destructive monitoring has not been used extensively in
the refractory industry. Over time the interest in them has de
creased as a result of the failure to improve instruments and
their cumbersome nature, measurement difficulties, and the
duration of processing results. The contemporary level of in
struments makes it possible to overcome these disadvantages
and simultaneously to propose new technical possibilities for
carrying out research in the field of non-destructive monitor
ing of refractories. Work in this field has been renewed by
OAO Kombinat Magnezit and OAO Borovichi Refractory
Combine [12, 13].
In attacking assimilation of the production of large
chamotte objects for glass making ShSU-33 No. 1 (300 ´
400 ´ 1000 mm) and ShSU-33 No. 5 (200 ´ 400 ´ 1000 mm)
according to GOST 7151 specialists of the OAO Borovichi
Refractory Combine understand that the size of objects up to
300 mm may lead to an increase scrap during production,
and the expense of this object does not make it possible to
carry out quality monitoring by traditional methods. There
fore, simultaneously with assimilation of technology for pre
paring a chamotte glass-beam there has been work on ultra
sonic monitoring of the internal structure of chamotte objects
with use of low-frequency ultrasonic defectoscope UD2N-PM
produced by KROPUS [14; www.kropus.ru] (Fig. 1).
Refractories and Industrial Ceramics Vol. 50, No. 6, 2009
1083-4877/09/5006-0445 © 2009 Springer Science+Business Media, Inc.
OOO Borovichi Refractory Combine, Borovichi, Novgorod Re
SPbNTs Association, St Petersburg, Russia.
NPTs KROPUS, Noginsk, Moscow Region, Russia.
Fig. 1. UD2N-PM defectoscope.