FIELD: chemistry.
SUBSTANCE: invention relates to production of refractories, having high emissivity and prolonged use limiting temperature and can be used in metallurgical heat engineering, high-temperature equipment and combustion chambers. The ready mullite-silica refractory contains the following eutectic phases, wt %: mullite 3Al2O3·2SiO2 85-95, cristobalite 1-15 chromite FeO·Cr2O3 1-6. The refractory is obtained by melting raw materials - technical alumina, quartzite and chromite - in an arc furnace at temperature 2100°C. Chromite increases heat resistance and cristobalite increases emissivity of mullite at high temperatures.
EFFECT: high heat resistance and emissivity of refractories, which enables to cut the heating period of furnaces and boilers when putting into operation, which in turn reduces fuel consumption when generating heat energy.
3 tbl
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