REFRACTORIES IN HEATING UNITS
ANALYSIS OF OPERATION OF A STEEL-POURING LADLE–TUNDISH
SYSTEM FOR A SECTION CBCM AND IMPROVED REFRACTORY
STRUCTURES OF THE TUNDISH RECEIVING CHAMBER
K. N. Vdovin,
Vasilii V. Tochilkin,
and Viktor V. Tochilkin
Translated from Novye Ogneupory,No.5,pp.3–5,May,2016.
Original article submitted March 2, 2016.
Operation of a section CBCM steel-pouring ladle–tundish, and also questions of organizing steel flow move
ment in the tundish receiving chamber are analyzed. The considerable effect of new components of refractory
structures on metal flow parameters in the tundish receiving chamber is demonstrated. Contemporary equip
ment of the receiving chamber provides effective formation of metal flow in the chamber and trouble-free
Keywords: CBCM, tundish, nonmetallic inclusions (NI), mathematical modeling, metal flow, refractory
A section CBCM steel-pouring ladle – tundish system
provides passage, refinement, and dispensing of molten steel
to a crystallizer [1, 2]. Improvement of the tundish receiving
chamber elements affects trouble-free operation and an in
crease in quality of steel poured into a CBCM [3, 4]. The
configuration of receiving chamber equipment for a five-
strand tundish of a section CBCM is shown in Fig. 1. Analy
sis of existing configurations of refractory tundish structures
has shown the following:
– a tundish receiving chamber is formed by a refractory
block in the form of a bottom and a row of stationary thresh
olds (in the direction of the ladle pouring chamber);
– pouring chambers are formed by thresholds.
There are nonmetallic inclusions (NI) within metal enter
ing a tundish that float with the passage of time [4, 5]. In or
der to remove coarse NI (>20 mm) metal receivers, barriers,
and thresholds of special construction are used [2, 6]. With a
nominal metal level in a tundish of less than 700 mm instal
lation of bottom metal receivers is excluded due to the high
rates of returning flows at the steel–slag surface . Metal
receivers, barriers, and thresholds have different shapes, di-
mensions, and location in a tundish [4,5–11].
Metal enters a tundish receiving chamber from a steel-
– an open stream (in the initial period of pouring with
the first opening of a steel-pouring ladle slide gate). The tun
dish side surface is scoured intensely: a torcrete mix and con
crete of the ladle side wall. This leads to disruption of tun
dish side surface integrity in the receiving chamber, and a
dangerous situation is breakage of the ladle casing with
Refractories and Industrial Ceramics Vol. 57, No. 3, September, 2016
1083-4877/16/05703-0221 © 2016 Springer Science+Business Media New York
FGBOU VPO G. I. Nosov Magnitogorsk State Technical Univer
sity, Magnitogorsk, Russia.
Fig. 1. Section CBCM tundish: 1 ) receiving chamber; 2 ) threshold;
3 ) receiving chamber bottom.