ENERGY-EFFICIENT HEATING SYSTEM OF TRANSITIONAL METALLURGICAL LADLES

In practice it was confirmed the effective use of the burner device of the diffusion method of natural gas burning in a high-speed direct-flow torch when heating the lining of transitional metallurgical ladles with the closed lid. Three designs of stabilizers for basal stabilization of the torch were developed and studied: 1) with stabilization flares formed when air flows onto 3 corner poorly streamlined stabilizers, in the shadow of which a part of the gas is supplied; 2) with a ring stabilization torch when burning a pre-mixed mixture of natural gas and air; 3) with a sudden expansion of the gas channel, in which a zone of intensive gas recirculation is formed. The GGPK-1.0 burner was developed for transitional ladles that operate within a wide range of changes in thermal power 1–5.29 and stabilizer with constant burning of the ignition ring, which contributes to the stability of combustion and allows the heating of ladles with tightly closed heat-saving lids. After the introduction of the developed burners at all stands for heating the ladles of the “Azovstal” metallurgical plant in 2019–2020 were obtained a significant improvement in the operation of the stands and a reduction in natural gas consumption. The fuel economy during heating the ladles is at least 20 %. The heating temperature of the inner surface of the lining of the transitional ladles is even over the entire surface. The temperature difference on the surface of the lining does not exceed 50 °C. Bibl. 16, Fig. 6.