Method capable of realizing on-line prediction of crystallizer flow field flow state in actual production

Abstract

The invention relates to a method capable of realizing on-line prediction of crystallizer flow field flow state in actual production, and belongs to the technical field of continuous casting processesof ferrous metallurgy steelmaking. According to the technical scheme, three rows of steel nail plates are manufactured according to the section sizes of a crystallizer and a water gap, penetrate through a stainless steel support placed near the water gap and a narrow face of the crystallizer to be vertically inserted into the liquid level of the crystallizer from the two sides of the water gap atthe same time under different casting parameter conditions, and are vertically lifted out after several seconds; and the diameter of metal blocks adhered to steel nails, the distance from the highestpoints and the lowest points of the metal blocks to the tail ends of the steel nails are measured correspondingly, and the height difference of the metal blocks at the highest points and the lowest points on two sides of the steel nails is calculated. The method capable of realizing on-line prediction of crystallizer flow field flow state in actual production has the beneficial effects that the advantages and disadvantages of the current continuous casting parameter conditions can be visually explained, a crystallizer flow field flow state transition diagram can be drawn based on a flow statemeasurement result, and casting parameters are optimized and adjusted in real time according to the field production rhythm, so that molten steel in the crystallizer is in a stable flowing state, andthe casting blank quality is improved.

Description

technical field [0001] The invention relates to a method capable of realizing on-line prediction of flow field flow state of a crystallizer in actual production, and belongs to the technical field of continuous casting process of iron and steel metallurgy and steelmaking. Background technique [0002] The flow field and flow state in the continuous casting mold directly affect the product quality of the slab. If the flow state of the molten steel in the mold is poor, it will directly affect the initial solidification of the slab, the melting of the mold powder, the lubrication of the mold powder between the mold copper plate and the solidified shell, the meniscus velocity distribution and the liquid level. Fluctuations lead to the occurrence of slag rolling, quality defects on the surface of the slab, and even steel breakout accidents, which affect the production rhythm. During the actual casting process, the liquid surface temperature of the molten steel is maintained at a...

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Problems solved by technology

[0003] At present, many scholars have used the method of inserting steel nails into the liquid surface of the mold to conduct a series of studies on the liquid steel flow rate, liquid level fluctuations and flow field symmetry of the mold liquid level during the casting process, but they have not studied the The flow state of the internal flow field is systematically studied, and it is impossible to predict the flow state of the internal flow field of the crystallizer according to the on-site production rhythm

Therefore, the research on the flow field measurement and online prediction of the flow state in the mold during the actual casting process is still a blank

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