Research progress on intelligent control and decision-making models for LF refining process

LF refining can effectively control the composition and temperature of molten steel, and play a role in cushioning and coordinating the production rhythm between steelmaking and continuous casting.The use of models for control and decision-making in LF refining can further standardize refining operations, improve the quality and stability of molten steel, and combined with automatic control, will strongly promote the development of intelligent refining, to achieve the optimization of steelmaking process and improve efficiency.In the context of the promotion of intelligent manufacturing in the steel industry, the LF refining process model is no longer limited to the establishment and deployment of single-function models, and has begun to develop in the direction of automation, integration and intelligence, while its function has also changed from a single prediction and recommendation to the overall intelligent control and decision-making.LF process control and decision models are mostly single-function models, but few integrated applications. Due to the complexity and uncertainty of the refining process, these models have some differences in stability and accuracy.Therefore, the establishment of an integrated model, and the switching and invocation of each model in the smelting process, combined with automatic control and closed-loop feedback, to further realize the intelligent control model has become an important direction for the future research and application of LF control model.In this paper, the development and research status of LF refining control and decision models are summarized, including alloying model, slagging model, temperature model, argon blowing control model, calcium treatment model and other single-function models, as well as intelligent refining technology.The modeling principles and functions of different models are systematically reviewed, and the future development direction of LF process intelligent control and decision model is prospected, which provides reference for the subsequent development and application of LF intelligent refining technology.The establishment and real landing of LF intelligent control and decision model not only requires the realization and linkage of process control and decision model, but also puts forward higher requirements for iron and steel enterprises.With the continuous upgrading and improvement of model design, automation technology and steel mill site environment, the application and development of LF intelligent control and decision-making model has great potential, which is expected to provide strong support for the realization of green, low-carbon and intelligent manufacturing, and will make great contributions to the progress and transformation and upgrading of the steel industry in the future.