Longitudinal cracking bleed-out detection and prediction device for continuous casting sheet billet and detection method thereof

Abstract

The invention provides a longitudinal cracking bleed-out detection and prediction device for a continuous casting sheet billet and a detection method thereof. The device is mounted at the area between a first sector section and a second sector section below a slab casting machine crystallizer and comprises high-temperature resistance metal ceramic probes, metal guide rods, a guide groove, hydraulic oil cylinders, hydraulic locks, one-way throttle valves, a reversing valve, a hydraulic pump, an oil tank and a PLC control system. According to the method, the high-temperature resistance metal ceramic probes move back and forth on the continuous casting sheet billet, so that the actual temperature of the continuous casting sheet billet is detected, and then the temperature is transmitted to the PLC control system; when the detected temperature jumps above 50 DEG C, the PLC control system gives out an alarm automatically, at the moment, the system is automatically switched to be in an accident control mode or a manual operation mode, the casting speed of the continuous casting sheet billet is decreased so that longitudinal crack diffusion can be reduced, and therefore bleed-out of the sheet billet because of longitudinal cracking is prevented. By means of the device and method, the bleed-out probability of the continuous casting sheet billet due to longitudinal cracking is lowered, the device and method can be used for longitudinal cracking prediction control over a continuous casting machine apart from bleed-out prediction, and the promotional value is high.

Description

technical field [0001] The invention is applicable to the field of continuous casting slab longitudinal crack breakout detection and forecasting, and in particular relates to a continuous casting slab longitudinal cracking breakout detection and prediction device and a detection method thereof. The temperature is used to predict whether longitudinal cracking occurs in continuous casting slabs. Background technique [0002] At present, the continuous casting slab breakout prediction is mainly realized by thermocouple detection of mold copper plate temperature change. The accuracy rate of predicting cohesive breakout is higher by monitoring the temperature change of the mold copper plate. However, the mechanism of slab longitudinal cracking and breakout is formed by the micro-cracks caused by the peritectic reaction of the steel in the mold, and the temperature change caused by the micro-cracks is difficult to monitor. Therefore, the temperature change monitored by thermocou...

AI Technical Summary

Problems solved by technology

However, the mechanism of slab longitudinal cracking and breakout is formed by the micro-cracks caused by the peritectic reaction of the steel in the mold, and the temperature change caused by the micro-cracks is difficult to monitor

Therefore, the temperature change monitored by thermocouples in the conventional crystallizer cannot predict the longitudinal cracking of the slab very well.

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