Molten steel steelmaking process temperature control system and method based on self-learning

Abstract

The invention relates to a molten steel steelmaking process temperature control system based on self-learning. The control system comprises a station outbound temperature calculation system, a stationadjustment coefficient self-learning function, an L3 plan receiving actual performance uploading system, a station target temperature control system and a molten steel temperature forecasting function. The station outbound temperature calculation system comprises calculation of outbound temperature of a converter, an argon blowing station, a refining furnace, a vacuum treatment furnace and calculation of continuous-casting tundish target temperature. The L3 plan receiving actual performance uploading system is used for receiving an L3 plan, the manufacturing standard and the operation standard and sending the heat production actual performance to the L3. The station adjustment parameter self-learning function automatically learns parameter values needing to be adjusted by plans and actualdeviations of the station under different conditions on the basis of historical data. The whole system is reasonable in design, various abnormal factors are considered in the calculation process, allstation L2 systems are connected in series, station adjustment parameters are self-learned, and the adaptability of the method is greatly enhanced.

Description

technical field [0001] The invention relates to a control system, in particular to a process temperature control of molten steel in steelmaking based on self-learning, and belongs to the technical field of steelmaking and smelting. Background technique [0002] Continuous casting requires a stable molten steel temperature and a certain degree of superheat in the tundish. It takes more than one hour from the melting of molten iron into the steelmaking converter to the completion of continuous casting. The path of each furnace of molten steel has many changes. Each steel type also has different requirements for the composition of molten steel and the addition of raw and auxiliary materials. These have caused the temperature of molten steel to be dynamic in each link, and the target temperature of each link also needs to be adjusted dynamically. In particular, the planned prearrangement of molten steel adopts a fixed casting cycle, which has a relatively large deviation from th...

AI Technical Summary

Problems solved by technology

It takes more than one hour from the melting of molten iron into the steelmaking converter to the completion of continuous casting. The path of each furnace of molten steel has many changes. Each steel type also has different requirements for the composition of molten steel and the addition of raw and auxiliary materials. These have caused the temperature of molten steel to be dynamic in each link, and the target temperature of each link also needs to be adjusted dynamically. In particular, the planned prearrangement of molten steel adopts a fixed casting cycle, which has a relatively large deviation from the actual situation, resulting in The calculation of the target temperature is inaccurate and cannot guide the production well

This process often requires the close coordination of skilled on-site operators, continuous casting central control personnel, and production scheduling personnel to manually determine the target exit temperature of molten steel, and then decide whether to exit the station. If the conditions are met, it will be delivered to the continuous casting platform, which will have a certain impact on the quality and production rhythm of the billet, and may even cause production accidents such as broken pouring and steel breakout.

The main reasons for the above problems are that the information communication is not timely, the information exchange between various systems is not smooth, the time rhythm of the links between stations, driving adjustment and assembly is not well grasped, and the status of equipment such as ladle usage status and tapping hole is abnormal The temperature of molten steel out of the station is too high or too low to meet the requirements of continuous casting. Therefore, a new solution is urgently needed to solve this technical problem.

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