Online control system and control method for surface quality of continuous casting billet

Abstract

The invention provides an online control system and an online control method for the surface quality of a continuous casting billet. The system comprises a casting billet quality judgment and product quality diagnosis system server, a high-temperature casting billet surface defect online detection system server and a casting billet surface quality control system process station server, wherein the casting billet surface quality defect online detection system feeds the surface quality condition of the casting billet back to the casting billet surface quality online control system process station server; and the process station server accurately judges problems resulting in a quality defect by combining a process parameter abnormities judged by a casting billet quality tracking and judgment system, and timely regulates process and equipment parameters. Therefore, the production of a large number of waste products for the next rolling procedure can be avoided, the production cost and the energy consumption are reduced, the production efficiency is improved, and the yield and quality of the product are improved.

Description

[0001] Technical field [0002] The invention relates to an online control system and a control method for the surface quality of continuous casting slabs, including a slab quality tracking and determining system and an online detection device system for slab surface quality defects, belonging to continuous casting slab quality detection and control in iron and steel metallurgy field. [0003] Background technique [0004] The hot delivery, hot charging and direct rolling (CC-DR) technology of high-temperature cast slabs is a new process developed in recent years. This process directly affects the degree of integration of the steelmaking-continuous casting-hot rolling process. Its economic benefits are directly reflected in energy saving, production cost reduction, production cycle shortening and product quality improvement. The support technology for realizing hot delivery, hot charging and direct rolling of high-temperature cast slabs includes many aspects. The most important th...

AI Technical Summary

Problems solved by technology

[0008] Due to the characteristics of continuous casting and rolling technology, it is impossible to check the defects of the cold slab and remove the defects in time. The defects of the latter slab are inherited to the finished rolled product through hot rolling, resulting in plate waste and wasting a lot of manpower and material resources.

And because there are many factors affecting slab defects (including equipment factors, operating factors and process factors, etc.), it is difficult to solve quality problems in a short time

[0009] (1) The current slab quality tracking and judgment system mostly adopts artificial intelligence judgment methods (mainly refers to the slab quality judgment neural network and expert system), through the monitoring of continuous casting equipment parameters, processing of process parameters and continuous casting metallurgy The reasoning of knowledge can timely predict the quality of continuous casting slabs in the future, including surface cracks, internal cracks, inclusions and slab deformation, etc. There is no accurate qualitative determination of the degree of influence of multiple process and equipment parameters on the quality of the slab, which leads to great inaccuracy in the judgment of the quality of the slab, which may lead to misjudgment and lead to castings that may not have quality problems. The slabs are processed off the assembly line and the slabs with quality problems are sent to the next rolling process, both of which will increase production costs and reduce production efficiency

[0010] (2) The on-line detection technology for surface quality defects of high-temperature slabs can detect the shape and depth of surface defects of slabs online and perform classification and quantitative evaluation. The casting slabs that do not meet the quality requirements are processed off-line, but the cause of the quality problems cannot be analyzed and solved in a timely and accurate manner, which will lead to continued quality problems in the subsequent production of slabs, increase the scrap rate, and lead to unsatisfactory Necessary economic losses, increased production costs, reduced production efficiency

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