A continuous casting slab longitudinal crack breakout detection and prediction device and its detection method

Abstract

The invention provides a continuous casting slab longitudinal crack breakout detection and prediction device and its detection method. Needles, metal guide rods, guide grooves, hydraulic cylinders, hydraulic locks, one-way throttle valves, reversing valves, hydraulic pumps, oil tanks and PLC control systems. Method The actual temperature of the continuous casting slab is detected by moving the high temperature resistant cermet probe back and forth above the continuous casting slab, and then the temperature is transmitted to the PLC control system; when the detected temperature mutation is above 50°C, the PLC control system automatically sends out Alarm, at this time the system automatically switches to the accident control mode or the manual operation mode to reduce the casting speed of the continuous casting slab to reduce the spread of longitudinal cracks, so as to prevent the slab from breaking out due to longitudinal cracks. The invention reduces the probability of steel breakouts due to longitudinal cracks in continuous casting slabs, and can be used for the prediction and control of longitudinal cracks in continuous casting machines in addition to forecasting steel breakouts, and has high popularization value.

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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