1070-4272/04/7702-0201 C 2004 MAIK [Nauka/Interperiodica]
Russian Journal of Applied Chemistry, Vol. 77, No. 2, 2004, pp. 201!204. Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 2, 2004,
Original Russian Text Copyright + 2004 by Lipunov, Teploukhov, Kovel’, Yupatov, Tetyukhin, Alikin.
AND INDUSTRIAL INORGANIC CHEMISTRY
Composition and Properties of Magnesium-containing
I. N. Lipunov, A. S. Teploukhov, M. S. Kovel’, I. A. Yupatov,
V. V. Tetyukhin, and V. I. Alikin
Ural State Forestry Engineering University, Yekaterinburg, Russia
Academy of Standardization, Metrology, and Certification, Ural Branch, Yekaterinburg, Russia
Verkhne-Salda Metallurgical Industrial Association Open Joint-Stock Company, Verkhnyaya Salda,
Yekaterinburg oblast, Russia
Received September 11, 2003
Abstract-Elemental, chemical, phase, and radionuclide composition of magnesium-containing slimes formed
in the electrolytic production of metallic magnesium was studied. The binding properties of the slime were
analyzed and the possibility of its use as a chloromagnesian binder was demonstrated.
One of ecological problems of large Russian indus-
trial centers is the increasing amount of nonutilizable
solid waste. Its storage and disposal have negative
ecological, economical, and social impacts on both
the environment and the human health.
Among industrial wastes of plants of nonferrous
metallurgy, magnesium-containing slimes formed in
the production of metallic magnesium are of special
interest from the viewpoint of their being involved
into further technological processing to give tech-
nical-grade products [1, 2]. The electrolytic produc-
tion of magnesium involves a two-stage dehydration
KCl . MgCl
O = KCl . MgCl
(first stage, 90oC),
KCl . MgCl
O = KCl . MgCl
(second stage, 240oC).
When carnallite is fused and the melt is heated in
chlorinators to 7503800oC, the remaining water is
removed. In this case, MgCl
is partly hydrolyzed to
give MgO, which is separated from the melt by set-
tling. The slime formed in the process is poured into
an ingot mold and, after cooling, stored in the form
of a monolithic stock in slime pits.
One of possible ways to utilize slime consists in its
reprocessing into a chloromagnesian binder. Inorganic
binders with magnesian type of hardening are known
[3, 4] to have good physicotechnical characteristics.
They have found wide application in the metallurgi-
cal, chemical, and refractory branches of industry.
Recently, magnesian binders have also been used to
prepare wood-mineral composite construction materi-
als [5, 6]. However, the increased sensitivity of the
technology of magnesian binders to the activity of
magnesium oxide and also the insufficient knowledge
of the mechanisms by which basic processes of mag-
nesian stone formation occur require special investi-
gations of magnesium-containing waste as a raw ma-
terial of technological origin.
This communication reports the results obtained in
chemical, X-ray, and gamma-spectrometric studies,
which make it possible to assess the prospects for
processing of slimes into powders of magnesian bind-
ers that can be used in production of composite build-
ing materials, along with caustic magnesites.
The study was performed with slime samples from
a magnesium production shop (AVISMA Closed Joint-
Stock Company, Berezniki). The content of Mg, Ca,
K, Na, Cl, Fe, Si, Al, and Ba in the slime was deter-
mined quantitatively by atomic-absorption photometry,
spectrophotometry, and plasma photometry. The con-
tent of magnesium-containing compounds (MgO,
) and alkali metal chlorides (NaCl and KCl)