The modernized system of the automatic control of metal level in the mold.
Journal Title: Наукові праці Донецького Національного Технічного Університету серія: Електротехніка і Енергетика - Year 2015, Vol 1, Issue 1
Abstract
Stabilization of the metal in the mold during continuous casting of steel is needed to ensure a high quality ingot, increasing the metal yield, reduce the time and improve the safety of the casting process. Maintaining a constant level provided stopper mechanism steel arising from tundish. Reducing deflection of the metal in the mold by improving the system of automatic control, ensuring stabilization of the performance and the constraints set production schedules when the speed of the ingot. Main disturbance has a significant impact on the level, is pulling speed billet pulling crate, which is located in the area where harvesting is almost completely hardened. Pulling speed varies according to certain laws in the casting process, and therefore can be pre-compensated for its influence on the metal level. Thus, it is advisable to use the principle of combined control based compensation controlled perturbations (ingot pulling rate) and the feedback process variable (level of metal).The block diagram of the combined system of regulation of the metal in the mold of continuous casting machines is provided. Based on the principle of invariance found static compensator has a simple structure and physical implementation. Computer simulation found that the modification designed automatic control system provides a reduction of deviation of the metal in the mold by 3-4 times compared to the existing system of automatic control. The change in the flow characteristics of the locking of the metering device in the process of continuous casting of metal in the CCM and its impact on the work of the process control system of continuous casting. An algorithm for assessing change in pro -throughput channel capacity dosing of liquid steel into the mold in Various Application-based mathematical models and measurement data. Conclusions: The structure of the combined control system of level metal in the mold of continuous casting machines is developed. On the basis of the principle of invariance a static compensator is determined. It has a simple structure and physical implementation. Сomputer simulation revealed that the modernized automatic control system provides reduction of deviation mold level by 2 times in comparison with existing when changing the drawing speed of the billet. A method of estimating the degree of overgrowth dispensing channel of liquid steel casting process based on direct measurements of the level, speed stretching the preform and the linear movement of the locking mechanism is suggested.
Authors and Affiliations
I. A. GARMATENKO, V. V. POTSEPAEV
Keywords
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