COMPARATIVE STUDY OF CHROMITE-PERICLASE
AND PERICLASE-CARBON REFRACTORY STABILITY DURING REACTION
WITH NICKEL PRODUCTION MELTS (EXPERIMENTAL DATA).
2. BEHAVIOR OF PERICLASE-CARBON REFRACTORIES
IN THE PRESENCE OF METAL-SLAG AND SLAG MELTS
T. I. Shchekina,
A. M. Batanova,
T. N. Kurbyko,
A. N. Pyrikov,
and B. N. Grigor’ev
Translated from Novye Ogneupory, No. 2, pp. 11 – 22, February 2015.
Original article submitted December 9, 2014.
Results are provided for mineral and petrographic study of phase formation and structural changes in chro
mite-periclase refractories after experiments for their reaction with slag melt and with slag and nickel melt.
The mechanism and intensity of refractory chemical corrosion during action on it of metal and slag, and slag
melts are compared. It is shown that periclase-carbon refractory reacts significantly weaker than chro-
mite-periclase with both types of melts. Presence of carbon prevents mutual diffusion of components and
chemical corrosion of periclase-carbon refractories, and this considerably improves their resistance compared
Keywords: chemical and phase compositions, slag and metal-slag melts, refractory corrosion and breakdown,
slag resistance, slag-metal resistance, chromite-periclase and periclase-carbon refractories, refractory reaction
The aim of this work is comparison of the stability of
periclase-carbon (MgO–C) refractories with action of nickel
production metal-slag and slag melts under laboratory condi
tions at 1600°C and atmospheric pressure. Results have been
considered in part 1 of the article for a study of chro
mite-periclase refractories, and a laboratory experiment and
the procedure for studying specimens have been provided.
Subsequent work included studying changes arising
within periclase-carbon refractories by optical and electron
microscopy, and determination of material phase and chemi
cal composition before and after an experiment. Initially
structure, phase, and chemical compositions (Tables 1 and 2)
of periclase-carbon refractory (specimen No. 2) were stud
ied. Then two test specimens were studied, one of which was
prepared with reaction of metal and slag melts with a cruci
ble wall, manufactured from MgO–C refractory (test 6, spec
imen No. 6), and another for a slag melt with the same re
fractory (test 5, specimen No. 5).
Specimens were studied using an Opton binocular opti
cal microscope and a Jeol JSM-6480LV electron microscope
using images in back-scattered electrons (BSE). Chemical
composition of phases was studied by means of an energy
dispersion electron-probe microanalyzer based on a
JSM-6480LV scanning electron microscope in an INCA-En
ergy 350 spectrometer and X-Max N-50 of the Moscow State
University petrology faculty. Petrochemical calculations of
the overall compositions of refractory and slag, obtained
from chemical analysis in a microprobe of refractories over
areas from 0.01 to 4 mm
, were performed using the Niggli
The original periclase-carbon refractory grade PU-9
(specimen No. 2) according to standard data has the follow
ing composition, wt.%: MgO not less than 93.0, CaO not
more than 1.5, SiO
not more than 1.l5, Fe
Refractories and Industrial Ceramics Vol. 56, No. 1, May, 2015
1083-4877/15/05601-0054 © 2015 Springer Science+Business Media New York
Part 1 of the article published in Novye Ogneupory No. 11 (2014).
M. V. Lomonosov Moscow State University, Russia.
OOO OgneuporTreidGrupp, Moscow, Russia.