Abstract
The article discusses the results of the development and research of controlled electrical preheating of casting troughs and intermediate tanks in the system of transport trays for pouring aluminum melt. Electric heating contributes to high-quality and safe pouring of the melt in the cold shop. The heating of the casting track links eliminates the possibility of an explosion when the melt contacts water or ice, and also maintains the fluidity of the metal and limits the temperature gradient in the melt. Evaluation of the efficiency of the heater system was carried out on the basis of mathematical modeling of thermohydrodynamic processes in the melt. Acceptable characteristics of the section of the trays were determined to improve the distribution of metal by the melting and casting complex. To ensure the electrical safety of the equipment, it is proposed to power the heaters at a reduced voltage. Changing the intensity of heating is implemented by switching the windings of a group of power transformers from a delta connection to a star connection. Preheating controls are built in the form of a relay-contactor subsystem integrated into the microcontroller control system of the foundry complex.
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