Method for rapidly detecting solidification tail end position of continuous casting billet

Abstract

The invention provides a method for rapidly detecting a solidification tail end position of a continuous casting billet. The method is applied to the technical field of continuous casting billet production processes. The method comprises the detection steps of enabling a roller (2) of a withdrawal and straightening machine (1) to apply pressure in the inner arc direction and the outer arc direction of the continuous casting billet; respectively cutting and taking down the pressed samples (3), and dissecting the pressed samples (3); after the plurality of pressed samples (3) are split, turning and grinding the split surfaces, and soaking the pressed samples (3) in a pickling tank; and comparing different pressed samples (3) formed by depressing different rollers (2) with non-pressed samples (4) respectively. According to the method for rapidly detecting the solidification tail end position of the continuous casting billet, a certain pressure is applied to the continuous casting billet through the withdrawal and straightening machine of a continuous casting machine, the position of the solidification tail end of the continuous casting billet can be rapidly and accurately judged, meanwhile, personnel do not need to be close to the high-temperature molten steel / continuous casting billet, additional investment and equipment transformation do not need to be increased, the operability is high, the technological process is simple, and the detection accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of continuous casting slab production technology, and more specifically relates to a method for quickly detecting the solidification end position of continuous casting slab. Background technique [0002] The production process of the continuous casting machine includes injecting molten steel into the tundish, and then the tundish distributes the molten steel to the crystallizer of each flow, through which the molten steel is rapidly solidified to form a solid billet shell, and then enters the secondary cooling area of ​​the continuous casting machine to continue After cooling, the solid billet shell will gradually thicken. After the liquid steel is completely solidified, it will be cut and put into stacks and transferred to the next process. The position where the molten steel is about to completely solidify (or where the molten steel is completely viscous) is called the solidification end position of the co...

AI Technical Summary

Problems solved by technology

At present, most steel mills in China use online slab nailing method, online perfusion tracer method, theoretical model measurement algorithm and other methods to detect the solidification end of continuous casting slab. The disadvantages of the first two methods are: 1) The operating area of ​​the operator is close to the high temperature Molten steel / continuous casting billet has a low safety factor and high risk; 2) Most of the raw materials used (such as nail guns, steel nails, tracers) are national security control items, which are difficult to transport and purchase

The disadvantage of the latter method is that it is more affected by external factors and the accuracy of the results is poor.

Therefore, the problem of detecting the solidification end position of the continuous casting slab has not been effectively solved

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