REFRACTORIES IN HEAT UNITS
EXPERIENCE OF OPERATING A PERICLASE-CARBON CONVERTER
LINING MADE FROM OBJECTS PRODUCED BY RHI
A. G. Valuev,
I. V. Govgalenko,
and I. G. Afanas’ev
Translated from Novye Ogneupory, No. 3, pp. 103 – 105, March 2011.
Original article submitted December 23, 2010.
A completed campaign of converter No. 2 from the firm RHI compared with a converter campaign with a tra
ditional lining, within which the maximum life was obtained in OAO MMK, is analyzed. It is established that
under conditions of charging less than 100 tons of scrap in a melt on average per campaign and observation of
the procedure in the course of lining operation (delivery of MgO containing additions, observation of soaking
regime after sealing, pouring and charging, skull application for more than 3 min, etc.) the life of an RHI lin
ing is more than 6000 melts.
Keywords: converter lining, operating parameters, physicochemical properties, converter campaign, slag,
In order to reduce specific consumption and increase the
life of a converter lining in 2010 OAO MMK purchased a
periclase-carbon lining produced by the Austrian firm RHI
with a guaranteed life index of 6000 melts. The lining was
installed in converter No. 2 at the end of January 2010 and
taken out of operation on 29 October 2010 with a life of
6161 melts. The maximum achieved life index for a tradi
tional converter lining of periclase-carbon objects is
6321 melts. On the basis of the results obtained from the re
fractory service laboratory comparative analysis was carried
out for the campaign of RHI lining and of traditional objects
with the maximum achieved life index.
Initially the RHI lining has an advantage with respect to
quality of refractory objects and zonality. The lining of RHI
objects consisted of eight forms of refractories, differing
with respect to physicochemical properties in accordance
with a predominant wear character in installation zones (Ta
ble 1), whereas in a lining of traditional objects four forms of
refractories are used in all with lower physicochemical prop
Refractories and Industrial Ceramics Vol. 52, No. 2, July, 2011
1083-4877/11/05202-0079 © 2011 Springer Science+Business Media, Inc.
OAO Magnitogorsk Metallurgical Combine, Magnitogorsk, Russia.
TABLE 1. Physicochemical Properties of RHI Lining Objects
(first 5 rows
(calcined substance), %:
MgO, not less than 94.0 95.7 95.7 95.5 95.6 95.5 95.7 93.9
C 10.0 11.0 — — 13 – 15 — 10.5 10.0
Open porosity, %, not more than 2.85 3.0 3.01 3.12 2.95 3.09 3.04 2.88
Apparent density, g/cm
, not less than 12.0 8.5 8.0 7.0 8.0 4.0 7.5 11.0
Ultimate strength in compression,
MPa, not less than 40 30 30 50 30 70 35 40