PRODUCTION AND EQUIPMENT
DEVELOPMENT OF TECHNOLOGY FOR PREPARING BLOWING
PARTITIONS FOR INTERMEDIATE LADLES
I. D. Kasheev
, A. G. Valuev
, I. S. Cheusov
, V. A. Artyushin
, N. A. Bosyakova
É. V. Stepanova
, E. V. Murashko
, and A. A. Khomenko
Translated from Novye Ogneupory, No. 8, pp. 16 – 17, August 2008.
Original article submitted January 31, 2008.
The construction of a multislotted insert is developed for an intermediate ladle partition. Model tests of blow
ing inserts are performed and their optimum construction is determined. Blowing partitions are prepared and
industrial testing is successful under the acid-converter shop working conditions at OAO Magnitogorsk Met
allurgical Combine. Blowing partitions with inserts having four rows of channels are recommended for indus
trial application from the test results.
Blowing molten metal with inert gases is an effective
way of improving metal quality, and in the course of blowing
non-metallic inclusions are removed from the molten metal.
One of the units within which this is accomplished is an in-
According to operating conditions and the purposes of
the metal it should be in the intermediate ladle for as long as
possible, in order that all of the non-metallic inclusions man
age to float to the surface and pass into the slag. In order to
limit direct metal flow into the steel-pouring opening a parti
tion and blowing units (inserts) are installed in the intermedi
ate ladle providing separation of non-metallic inclusions as a
result of organizing metal flow in the required direction and
excluding stagnant zones. The place for installing these ele
ments is determined in accordance with the geometric di
mensions and shape of the intermediate ladle. A scheme for
placing them in an intermediate ladle is shown in Fig. 1.
In the first stage of this work a construction was ap
proved with one slotted channel with a slot thickness of
0.2 mm and with a length corresponding to the width of the
pouring openings located in the lower extension of the inter
mediate ladle partition (Fig. 1a ). .
Operation testing of partitions in the acid converter
workshop (ACW) of OAO Magnitogorsk Metallurgical
Combine (OAO MMK), although it showed some improve
ment in metal quality, revealed some disadvantages: difficul
ties in controlling gas flow during blowing and insufficient
life for articles due to erosion of the channel. In addition, in
preparing test partitions cases were noted of joining of the
walls of the gas channel, the main reason for which may be
the irrational shape of the gas channel and shrinkage of con-
crete during hardening and heat treatment. Therefore subse-
quent work was carried out in the direction of finding start-
ing materials with high wear resistance, and also improve
ment of the blowing unit construction of the intermediate la
dle partition with the aim of providing control of the gas flow
Refractories and Industrial Ceramics Vol. 49, No. 5, 2008
1083-4877/08/4905-0340 © 2008 Springer Science+Business Media, Inc.
GOUVPO UGTY — UPI, Ekaterinburg, Russia.
OAO MMK, Magnitogorsk, Russia.
Fig. 1. Layout of partition (a) and blowing unit (b ) in an intermedi
ate ladle: 1 ) partition; 2 ) blowing unit.