REFRACTORIES IN HEATING UNITS
STEEL-POURING LADLE PERICLASE-CARBON
LINING LOCAL (PITTING) WEAR FORMATION MECHANISM
D. V. Ryabyi,
A. A. Kondrukevich,
and S. V. Semiryagin
Translated from Novye Ogneupory,No.9,pp.3–6,September, 2016.
Original article submitted April 29, 2016.
Mechanisms are considered for local (pitting) wear formation of the working layer of periclase-carbon steel-
pouring ladle lining in converter production. The most frequent reasons for formation of this type of wear are
Keywords: lining local (pitting) wear, steel-pouring ladle, lining, periclase-carbon refractory.
A steady trend in the metallurgical industry is a reduction
in the cost of smelted steel due to optimizing specific expen-
diture on lining metallurgical units. The most expensive rea-
son for specific refractory consumption in steel smelting is a
steel-pouring ladle (35 – 45%) . In view of this work
aimed at studying lining problems is important.
Continuous transformation of metallurgical units in the
7 – 10 years, connected with differentiation of the smelting
range and organization of production units for steel extra fur
nace treatment (increase in productivity and functional po
tential) and also complicate lining schemes, leading to occur
rence of new forms of steel pouring ladle lining wear as a re
sult of an increase in severity of operating conditions. One
form of wear is local (pitting) wear of steel-pouring ladle
periclase-carbon refractory. “Pitting” wear of the working
layer lining of a 60 ton steel-pouring ladle in the area of the
slag belt is shown in Fig. 1. The lining was made from
periclase-carbon refractory produced overseas with a lining
“edgewise” in one row. The main features and nature of local
wear development have been considered in .
The present work is aimed at studying development of
local (pitting) wear of periclase-carbon refractory as a result
of thermomechanical loads (mechanical nature of develop
ment). Development of local wear (see Fig. 1) is observed
predominantly over joints between pieces in the lining work-
ing layer of a steel-pouring ladle. The main reason for this
wear is a combination of thermomechanical loads during la-
dle operation. Under thermal action on a lining plastic and
thermal expansion arises, which leads to refractory cracking.
During thermomechanical formation of “pitting” wear the
lining heating stage has a considerable effect .
A temperature gradient arises within the working layer of
a lining during heating. As a result of this thermomechanical
stresses develop for periclase-carbon refractory caused by
volumetric and linear expansion. These stresses may differ in
the brickwork radial direction in relation to depth of refrac
tory heating from its working side (“hot” side) towards the
rear (“cold” side) in refractory brickwork. Some effect on
Refractories and Industrial Ceramics Vol. 57, No. 5, January, 2017
1083-4877/17/05705-0435 © 2017 Springer Science+Business Media New York
GVUZ DonGTU, Lisichansk, Ukraine.
FGBOU VPO D. I. Mendeleev Russian Chemical Technology
University, Moscow, Russia.
Fig. 1. Local (pitting) wear of steel-pouring ladle periclase-carbon