FUSED FORSTERITE-PERICLASE TESTED FOR SLAG ATTACK
L. B. Khoroshavin,
T. M. Golovina,
and N. V. Vakhrusheva,
Translated from Ogneupory i Tekhnicheskaya Keramika, No. 6, pp. 53 – 55, June, 2002.
Results of a study of the interaction between fused forsterite-periclase and ladle slag are reported. Fused for
sterite-periclase is shown to be more resistant to slag erosion than forsterite or periclase.
Fused products of serpentinous dunite from the Nizhne
tagil’skii massif with the addition of a magnesia component
(magnesite, brucite, or sintered periclase) have been studied .
The fused product was forsterite-periclase (FP), the ob
ject of study in the present work.
The study involved the following steps:
– analysis of the material composition of fused products;
– study of the effects produced in FP on exposure to
– comparison of FP and forsterite and periclase refrac-
tories tested for slag resistance.
Fused FP is a material bright-gray in color composed of
80 – 85% forsterite, 12 – 15% periclase, and about 3%
glassy phase with metallic inclusions.
The quenching surface is gray and splendent. The texture
varies from finely porous to dense. Rounded inclusions of a
metallic phase occur in the pores.
Structurally, fused FP is inhomogeneous: its structure
varies from a medium-grained type with a forsterite grain
size of 0.5–5mm to a spinephex-type (frosted glass pat
tern). The spinephex structure is characteristic of natural oli
vine vulcanites — comatiites crystallizing from a magmatic
melt during rapid cooling, which results in the predominance
of ribbed crystalline forms in olivine (forsterite).
The forsterite crystals have a long prismatic habit.
Prisms with a length of 1 cm or more are collected into “bun
dles” with an angle of deviation from parallelism between
separate individuals (Fig. 1). In a thin section cut perpendic
ular to the long axis of crystals — in the (001) crystallo
graphic plane — each individual prism exhibits a cross sec
tion close to hexagonal. As is seen in Fig. 2, individual
“hexagons” viewed under a microscope with an analyzer
have the same interference color and extinguish simulta
neously, that is, they are blocks cemented into a single crys
tal rather than an aggregate of grains.
Inside the forsterite crystals, small rounded inclusions of
periclase are observed. In size (across diameter), they are
mostly smaller than the thin-section thickness (0.03 mm),
and they exhibit color interference and therefore are not iso-
Refractories and Industrial Ceramics Vol. 43, Nos.5–6, 2002
1083-4877/02/0506-0231$27.00 © 2002 Plenum Publishing Corporation
This work was financially supported by the Ogneupor-Komplekt
Eastern Institute for Refractories Research and Production Asso
ciation Joint-Stock Co., Ekaterinburg, Russia; Ural State Mining
and Geological Academy, Ekaterinburg, Russia.
Fig. 1. Cross section of forsterite crystals in a plane perpendicular
to (001). Shown is the photographic picture of a thin section of fused
forsterite-periclase taken using an analyzer. Horizontal length is
Fig. 2. Cross section of forsterite crystals in the (001) plane. Shown
is the photographic picture of a thin section of fused forsterite-
periclase taken using an analyzer. Horizontal length is 0.8 mm. Fo)
forsterite; Fo + Per) forsterite-periclase rim.