FEATURES OF CHEMICAL AND MINERAL COMPOSITION
OF A RAMMED COMPENSATION LAYER OF A LINING AFTER SERVICE
V. V. Sharapova
Translated from Novye Ogneupory,No.12,pp.3–5,December 2010.
Original article submitted August 27, 2010.
Results are provided for a study of a rammed compensation layer of the lining of a ferroalloy furnace RTP-2
after service. It is established within the layer gaseous components from oxygen compounds of silicon, tita
nium, aluminum, iron, and also gaseous potassium and titanium, condense in the layer and are
disproportionated. In the carbon mass there is precipitation of silicon monoxide, and reaction products of both
complexes and rammed layer carbon material.
Keywords: chemical and mineral composition, lining compensation layer, ferroalloy furnace, suboxides, gas
A study of chemical and mineral composition of refrac-
tory materials after service is an important component of
studying the lining of metallurgical units. Use of comprehen-
sive methods for studies makes it possible to reveal the con-
formity between features of the physicochemical processes
that occur for metal preparation and the properties of refrac-
tory lining objects. In studying components of the material
structure it is desirable to use methods of technical petrogra-
phy combined with x-ray microanalysis and thermodynamic
studies. The aim of this work is to study a rammed compen
sation layer of the lining of a ferroalloy furnace RTP-2 after
service. The compensation layer of a carbon mix type RST
16/1 with a thickness of 80 – 100 mm was located between
the casing of the furnace and the refractory materials.
The mineral and phase composition of a sample of a
worn rammed layer and sublimates were studied by contem
porary petrographic analysis methods in reflected and trans
mitted light in MBI-6 and MIN-8 microscopes respectively
at 210- and 1425-fold magnifications. In order to identify
phases a standards election of immersion liquids IZh-98 with
refractive indices of 1.408 – 1.980 was used. The elemental
composition of the sublimate material in the carbon mass
was studied in a SUPPRA 40 WDS scanning electron micro
In the compensation layer of the furnace lining after ser
vice extraneous brittle material was detected of a red
dish-brown color (Fig. 1) with a size of 20 ´ 10 ´ 10 mm.
Microscopically this substance is not uniform. Within it there
are traces of white and red-brown elements. In transmitted
light in immersion liquids the material is represented by sub-
limates, and in fact colorless flakes of silicon monoxide with
inclusions of Si
of yellow-brown color. In addition,
glasses of different composition, and also needles of b-SiC
are detected. Glass in sublimates is represented by
lechateliarite (amorphous SiO
); glass with N = 1.542 con-
. There is vitrified SiO with N = 1.54 .
Within the sublimate material there is a glass phase with
N = 1.466 with a content of 5% SiO
and 0.14% OH
Presence of glass points to the fact that the sublimates con
groups, i.e., during melting of crude ferronickel
there is formation of a vapor and gas phase of nickel-contain
ing raw material, which condenses in the furnace lining, par
ticularly in the compensation layer.
Refractories and Industrial Ceramics Vol. 51, No. 6, March, 2011
1083-4877/11/5106-0394 © 2011 Springer Science+Business Media, Inc.
GP UkrNIIspetsstal’, Zaporozh’e, Ukraine.
Fig. 1. Silicon suboxides in rammed compensation layer material of
a ferroalloy furnace lining.