Abstract
X-ray methods, IR-spectroscopy, and microscopic techniques were used to investigate the phase inversions occurring during the firing of the clay part of the tailings from the gravitation enrichment of zircon-ilmenite ores from the Karotkel'sk deposit to evaluate the wastes as ceramic raw materials. Results showed the development of a liquid phase at a temperature below 950 C, intense crystallization of mullite at 1000-1050 C, the formation of a solid solution of the substitution type, replacing the mullite by oxides of iron and titanium, and the polymorphic inversion of beta-quartz to alpha-cristobalate. The properties of facing tiles from (%) 50 clay part of the KhGR ores, 30 light fraction ash and 20 wollastonite are shown and compared with the properties of tiles made from factory bodies of the Tselinogradsk ceramic combine.
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