Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 10, pp. 1531−1535.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © A.V. Zaichuk, Ya.I. Belyi, 2012, published in Zhurnal Prikladnoi Khimii, 2012, Vol. 85, No. 10, pp. 1595−1600.
AND INDUSTRIAL INORGANIC CHEMISTRY
Brown Ceramic Pigments Based on Open-Hearth Slag
A. V. Zaichuk and Ya. I. Belyi
Ukrainian State Chemical Engineering University, Dnepropetrovsk, Ukraine
Received January 23, 2012
Abstract—The possibility and expediency of the application of dump waste open-hearth slag for obtaining
ceramic pigments was revealed on the basis of complex physicochemical studies. Ceramic pigments of a brown
color gamma were synthesized in the system open-hearth slag–Сr
–NiO. The composition of the crystal phase
of roasting products of pigment burdens and its correlation with optical color indexes were determined. Labora-
tory and production tests of developed slag-containing pigments in the composition of various vitreous coatings
were carried out.
Traditionally the production of ceramic pigments for
various types of glasses and vitreous coatings is connected
with considerable material and energy expenditures,
which is caused by the application of expensive com-
mercially pure raw material with a low thermal activity.
Therefore researches aimed at the production of ceramic
pigments from unconventional (secondary) materials
of various industries, in particular metallurgical, are of
scientiﬁ c interest and practical worth.
Metallurgical slags represent coproducts of high-
temperature processes formed as a result of oxidation and
chemical reactions between metal–burden admixtures,
ﬂ uxing components, and products of furnace lining de-
Recently several factories of CIS countries started to
develop steelmaking slag dumps with fractionation of
slag and magnetic separation of its fractions enriched
with iron, which further are used in steelmaking and
blast–furnace processes or in sintering of ores . At the
same time the slag part remained after such rehash also is
characterized by a considerable iron content in the form
of both oxides and metal, which stipulates a possibility
of its further usage in various technologies.
The aim of this work was the study of a possibility to
apply open-hearth slags as a basic raw material for the
synthesis of ceramic pigments of a brown color gamma.
Dump waste open-hearth slag of one of Dnepropetro-
vsk ironworks exposed to preliminary magnetic concen-
tration and partitioning was chosen as the test subject.
A visual estimate of the waste under study has shown
that it represents preferentially a medium-dispersed mate-
rial of brownish-grey color with rather high content of
large inclusions (larger than 5 mm).
The chemical analysis of a pigment part isolated from
a pilot batch of open-hearth slag has shown a high content
of iron compounds (more than 24.0 wt %) and also the
presence of Cr
and MnO (about 6.0 wt % in total),
which is a rather important factor for obtaining brown
ceramic pigments on its basis:
CaO MgO MnO ZnO K
26.96 6.95 0.36 15.80 8.17 0.34 2.47 12.62 13.98 3.36 0.12 0.36 8.51 100