PERICLASE-CARBON REFRACTORIES FOR OPERATION
IN THE MOUTH OF A CONVERTER VESSEL
V. I. Pishida,
B. M. Boichenko,
K. G. Nizyaev,
S. N. Kravets,
M. S. Tarnavskii,
and A. V. Shibko
Translated from Novye Ogneupory, No. 2, pp. 23 – 25, February, 2005.
Original article submitted November 12, 2004.
The performance of periclase-carbon refractories cemented with a phenolic bond that are intended for use in
the lining of the cone section of the oxygen converter vessel has been studied by x-ray diffraction and petrog
raphy techniques. The results obtained provide a basis for further improvement of the oxygen converter tech
nology and refractory fabrication.
In this paper, we report on the results of a study of the
wear of periclase-carbon refractories used for the lining of
the mouth of a converter vessel. Our interest in this subject
stems from the observation that excessive wear of this part of
the refractory lining has been the major reason for the de-
commissioning of oxygen converters at the DMW JSC.
Specimens for inspection were sampled from the refractory
lining of the mouth of a converter vessel with a service life of
1600 heats. The specimens were analyzed for phase compo
sition on a DRON-2 x-ray diffractometer (MoK
diffraction patterns were measured in the range of 2q =
5–70°. Macro and microtextures of the specimens were in
spected using a Neophot-21 light microscope in the bright
and dark field in polarized light. Photographic pictures were
taken using a Nicon COOI PIX 5700 digital camera.
The specimens were inspected by using a layer-by-layer
surface removal technique to a depth of 100 mm. A compari
son of the textures of used and intact refractory materials
(Fig. 1) allowed easy identification of the changes that the re
fractory had undergone during service.
The slag crust in post-service specimens displayed a mo
saic-like crack pattern; most cracks (named the “old” cracks
by convention) were impregnated with secondary periclase
(Fig. 2) that formed owing to oxidized magnesium vapors
extended from the bulk to the surface. New cracks could also
be identified that required some time to become filled with
secondary periclase. Acicular periclase crystals were ob-
served to occur in the pores (Fig. 3a ). The pores were
formed because of the evolution of magnesium vapors and
Refractories and Industrial Ceramics Vol. 46, No. 2, 2005
1083-4877/05/4602-0110 © 2005 Springer Science+Business Media, Inc.
Based on materials reported to the 8th Congress of Steelmakers
(18 – 22 October, 2004, Nizhny Tagil, Russia).
National Metallurgical Academy of Ukraine, Dnepropetrovsk,
Ukraine; Petrovskii Dnepropetrovsk Metallurgical Works (DMW)
Joint-Stock Co., Dnepropetrovsk, Ukraine.
Fig. 1. Photograph of a refractory prior to service.
Fig. 2. Fissures on the surface of a slag crust.