BLOW PLUGS FROM OOO KERALIT
I. V. Egorov
and A. S. Matvienko
Translated from Novye Ogneupory, No. 12, pp. 25 – 30, December, 2010.
Original article submitted April 26, 2010.
The activity of OOO Keralit relating to the production and use of blow plugs is described. The characteristics
of the plugs are presented.
Keywords: blow plug, OOO Keralit, casting ladles, lining, refractory concrete
The demand for flash treatment of steel with blow by
means of an inert gas (argon or nitrogen blow) from the mo
ment of appearance of this process in the 1950s and 1960s is
explained chiefly by the fact that continuous casting of steel
requires precise regulation of the temperature of the metal in
the ladle and homogeneity of its chemical composition. The
blow principle is based on permeation of the volume of the
metal with a large quantity of fine bubbles (Fig. 1). Initially,
blow is accomplished by submersion of a tuyere in the ladle
together with the smelt. A metallic housing in the form of a
tube which is either lined with articles (stopper tubes) or
sealed with concrete constitutes the base of the tuyere. The
strength of such articles is much less than that of bottom
blowing tuyeres and the price is much higher. For this rea
son, the use of overhead blowing tuyeres is now limited to
the addition of deoxidizing and alloying agents as well as
functioning as an additional piece of equipment in failure of
lower blow. The technology of metal blow through a
steel-tapping hole is used rarely due to the lack of protection
against the passage of molten metal through the channel of
the oxygen tube in sudden termination of the gas feed. Thus,
steel blow through a bottom blowing tuyere is today the opti
Steel blow by means of an inert gas (Fig. 2) makes it pos
– increase the productivity of the steel-making vessel
through an increase in the rate of chemical processes in flash
treatment of steel;
– realize precision finishing of steel with respect to
– increase the purity of steel with respect to nonmetallic
– achieve degasification of the metal;
Refractories and Industrial Ceramics Vol. 51, No. 6, March, 2011
1083-4877/11/5106-0411 © 2011 Springer Science+Business Media, Inc.
From the proceedings of the International Conference of Metal
lurgists and Refractory Workers (April 22 – 23, 2010, Moscow).
OOO Keralit, Naro-Fomisk, Moscow District, Russia.
Fig. 1. Methods of metal blow.