QUANTITATIVE ANALYSIS OF PERMEABLE CERAMIC STRUCTURE
MADE FROM NARROW-FRACTION ELECTROCORUNDUM POWDER
AND CORUNDUM HOLLOW MICROSPHERES
V. P. Tarasovskii,
B. L. Krasnyi,
V. I. Koshkin,
Yu. M. Borovin,
A. A. Vasin,
A. D. Smirnov,
and M. N. Kudryash
Translated from Novye Ogneupory, No. 6, pp. 49 – 52, June, 2016.
Original article submitted November 16, 2015.
The structure of permeable ceramic made from narrow-fraction electrocorundum grade F 240 and corundum
hollow microspheres is studied using computer analysis of images obtained in a scanning electron micro
scope. Such quantitative indices are determined as pore shape, pore shape distribution, pore twisting factor,
etc. It is shown that pore shape has a decisive effect on specimen permeability.
Keywords: ceramic, structure, pores, shape factor, twisting, permeability, electrocorundum, hollow
Currently mining and enrichment enterprises, concerned
with recovery and processing of various economic minerals,
in view of exhaustion of the main deposits are required to
change-over to processing ore with very low valuable com-
ponent content. This leads to a requirement for carrying out
dewatering of an enormous amount of suspensions. Now for
these purposes the most widespread disc vacuum filtering
units (DVFU) are used extensively for which with a filtration
area of 45 – 75 m
(area of a single filtering element
) . It is possible to improve DVFU productivity
by increasing the number of single filtering elements or by
increasing their area. Another way of improving filtering ele
ment productivity in our view is optimization of the perme-
able ceramic pore structure from which filter elements are
Results are given in this work for quantitative compara-
tive analysis of the structure of ceramic made of electro-
corundum powder having a fragmented shape, and corundum
hollow microspheres. In order to perform quantitative analy
sis of the ceramic structure the procedure of SEM-image
quantitative analysis was used .
The materials for specimen manufacture were porous ce
ramic of electrocorundum powder grade F 240 produced by
OAO RUSAL Boksitogorsk (TU 3988-064-00224450–94),
corundum hollow microspheres produced by OOO KitStroi
SPb, and processing binder synthesized in FGBOU VPO
MAMI. Electrocorundum composition and processing alu
minosilicate binder chemical composition are given in
Refractories and Industrial Ceramics Vol. 57, No. 3, September, 2016
1083-4877/16/05703-0313 © 2016 Springer Science+Business Media New York
FGBOU VPO Moscow |State Engineering University (MAMI),
ZAO NTTs Bakor, Shcherbinka, Moscow, Russia.
FGAOU VO Sevastopol’ State University, Sevastopol’, Russia.
OOO KitStroi, St Petersburg, Russia.
TABLE 1. Corundum Material and Complex Processing Binder Chemical Composition, wt.%
CaO MgO K
Electrocorundum F 240 99.77 0.03 — 0.015 — — — 0.18 —
Corundum hollow microspheres 99.74 0.03 — 0.017 — — — 0.019 —
Aluminosilicate binder 31.67 51.58 0.45 0.86 7.52 0.57 0.42 0.47 2.41