Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 8, pp. 1186−1191.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © E.S. Abdrakhimova, V.Z. Abdrakhimov, 2012, published in Zhurnal Prikladnoi Khimii, 2012, Vol. 85, No. 8, pp. 1247−1252.
OF SYSTEMS AND PROCESSES
Study of Combustion Processes in Firing of a Heat-Insulator
Produced from Technogenic Raw Materials from Nonferrous
Metallurgy and Power Industry
E. S. Abdrakhimova
and V. Z. Abdrakhimov
Samara State Aerospace University, Samara, Russia
Samara Academy of State and Municipal Management, Samara, Russia
Received November 25, 2011
Abstract—Combustion of heat-insulators produced from technogenic raw materials without use of conventional
natural materials were studied. It is shown that most part of volatiles are removed in thermal treatment of heat
insulators in the temperature range 400–600°C, the reduction of iron is considerably accelerated at 1050–1100°C,
and organic compounds can hardly be found in a ceramic material ﬁ red at 1100°C.
A huge amount of wastes annually accumulates
in various industries. About 8–10% of the cost of
industrially manufactured products is expended for
removal of these wastes .
Manufacture of ceramic construction materials is
one of the most material-intensive branches of national
economy, and, therefore, rational use of fuel, raw
materials, and other material resources becomes a key
factor for its successful developed under the conditions
of economical reforms being conducted. In this context,
use of industrial wastes in ceramic materials takes-on
a particular topicality .
The goal of our study to examine combustion
processes in ﬁ ring of a heat insulator produced from
technogenic raw materials (wastes); the clayey part
of the gravity “tail” of zircon-ilmenite ore and coal-
cleaning ﬂ otation wastes with increased carbon content
without use of conventional natural materials, because
just combustion processes in ﬁ ring of a heat insulator
form the basic physicomechanical properties of articles.
It has been shown [2–8] that the clayey part of the
gravity “tail” of zircon-ilmenite ore (GTZI) and coal-
cleaning ﬂ otation wastes can be, in principle, used
in manufacture of ceramic materials. The chemical
composition of the components under study is presented
in Table 1.
The clayey part of the gravity “tail” of zircon-
ilmenite ore has been used as a binder to obtain a heat
insulator [2–5]. In fact, GTZI is a high-melting clay,
but has a complex mineralogical composition, which
includes, in contrast to the conventional high-melting
Table 1. Chemical composition of components
Content of oxides, wt %
CaO MgO R
Clayey part of gravity “tails” 55.85 25.28 6.53 1.88 1.24 1.70 0.10 7.5
Coal-cleaning waste 53.84 15.52 5.3 1.5 0.51 4.47 0.91 18.7