Method for preventing crystallizer of continuous casting machine from sticking breakout

Abstract

A method for preventing a crystallizer of a continuous casting machine from sticking breakout belongs to the technical field of continuous casting methods. Temperature sensors are mounted on four cooling water outlet pipes of the crystallizer, temperature variation values collected by the temperature sensors are input into a recording and analyzing device, and the recoding and analyzing device is used for predicting a danger level of sticking breakout according to water temperature variation conditions of the cooling water outlet pipes and prejudging whether billet shells cracks or not and whether a sticking breakout danger exists or not by judging transient variation of water temperature of the crystallizer, so that a casting speed of the continuous casting machine can be lowered timely, and breakout accidents can be avoided. A prediction method of the method is reasonable in design, convenience in mounting, utilization and maintenance is achieved, costs on purchasing, utilization and maintenance of equipment are low, and applicability to utilization in various iron and steel enterprises is achieved. The method for preventing the crystallizer of the continuous casting machine from sticking breakout has the advantages that the problem of sticking breakout of the crystallizer of the continuous casting machine bothering the iron and steel enterprises for a long time is solved, a worldwide advanced level in the same industry is reached, and obvious economic benefits are provided.

Description

technical field [0001] The invention relates to a method for preventing cohesive breakout of a mold of a continuous casting machine during normal steel pouring and ensuring stable operation of the continuous casting machine, and belongs to the technical field of methods for preventing breakout during continuous casting. technical background [0002] Among the various accidents that occur in the continuous casting production process, the most serious damage is the steel breakout accident. Breakout refers to that after the solidified billet shell leaves the mold during continuous casting, the billet shell cannot withstand the action of hydrostatic pressure and billet drawing force, and breaks at the weak point to make molten steel flow out. Steel breakout accidents will endanger personal safety, damage equipment, and even interrupt production, affecting the output and product quality of casting machines. There are many types of continuous casting breakouts, among which the br...

AI Technical Summary

Problems solved by technology

At present, the mold copper plate temperature measurement method is a kind of adhesive breakout method commonly used in large-scale metallurgical enterprises, but this method has the following problems: (1) Due to the need to measure the temperature of the mold copper plate according to the number of thermocouples A considerable number of mounting holes are drilled on the surface, and the installation is more complicated, so the cost is higher, and the life of the crystallizer is likely to be shortened; (2) This method needs to continuously track dozens or even hundreds of thermocouples, so the algorithm is relatively complex. (3) The use of this method is easily affected by the installation accuracy of the thermocouple, resulting in a high false alarm rate or false alarm rate of steel breakout; in addition, this method is also easily affected by the working status of the thermocouple itself, such as: once This method will not work if several thermocouples are damaged or the reported temperature values ​​are inaccurate

In recent years, mold copper plates pre-embedded with optical fiber thermocouples have appeared on the market, which can better solve the above problems, but the cost of such copper plates is very expensive, and metallurgical enterprises themselves cannot repair the copper plates themselves. When the copper plate fails, it can only be scrapped or returned to the original factory for processing

Based on the above reasons, the crystallizer copper plate temperature measurement method can only be completed by some very professional installation manufacturers at present, and this method is expensive and cannot be widely used in many domestic iron and steel enterprises

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