Detecting device of discharging slag from ladle

Abstract

The invention provides a device for detecting the vibration of slag dropping in a large ladle. The device is used for detecting the vibration of a protective sleeve of a long water gap caused by molten steel which flows from the large ladle to a middle ladle through the protective sleeve of the long water gap during a metallurgical process, wherein the vibration detection device comprises a sensing mechanism, an actuating mechanism and a sensor, wherein the sensing mechanism is selectively contacted with the outer wall of the protective sleeve of the long water gap and senses the vibrating situation of the protective sleeve of the long water gap; the actuating mechanism is connected with the sensing mechanism and drives the sensing mechanism to protrude or withdraw; and the sensor is connected with the sensing mechanism and receives vibration signals transmitted by the sensing mechanism. The device for detecting the vibration of slag dropping in the large ladle is arranged on a slag dropping mechanical arm, fixed on the ground or arranged inside the mechanical arm; and a vibration isolator is arranged between the vibration detection device and the mechanical arm or between a box body and the ground.

Description

technical field [0001] The invention relates to the field of metallurgical industry, in particular to a vibration detection device applied to ladle slag. Background technique [0002] In the production process of continuous casting process, molten steel flows from the ladle through the shroud protective sleeve into the tundish, and then enters the crystallizer through the sliding nozzle, and solidifies into billets of various cross-sections after cooling. Among them, the slag layer has the effect of heat preservation and anti-oxidation on the molten steel in the ladle and the tundish. However, when the slag layer in the tundish is too thick, it will cause contamination of the molten steel, which will increase the thermal erosion of the refractory material in the tundish and increase the The thickness of the residual slag layer of the tundish. Therefore, the flow of steel slag from the ladle to the tundish must be controlled, which is very important for improving the quality...

AI Technical Summary

Problems solved by technology

The process of enlarging the bale will bring impact to the entire bale turret, and this impact will also cause the vibration impact of the operating arm;

[0010] Third, during the detection of slag dropping in large bales, the operator frequently operates the slide plate, and each operation will affect the vibration of the operating arm and last for a period of time. The vibration change of the operating arm) will be covered up, thus affecting the judgment of slag discharge;

[0011] Fourth, the on-site operating arm has high rigidity and heavy weight, and is fixed on the tundish car. When the vibration caused by the molten steel in the shroud protective sleeve is transmitted to the sensor at the end of the operating arm, the signal corresponding to the vibration of the molten steel is already very weak. , basically only the signal corresponding to the interference vibration remains;

[0013] Therefore, the traditional vibration detection device that installs the sensor directly on the mechanical arm makes the signal collected by the sensor contain a lot of information that has nothing to do with the vibration characteristics caused by the liquid steel vibration, and the signal-to-noise ratio of the signal transmitted to the sensor is very low, which is useful The signal is buried in a lot of unwanted signals with very small vibration amplitude

Carrying out time domain analysis, frequency domain analysis, ceps frequency domain analysis, statistical analysis, wavelet analysis and other signal analysis on such signals and judging by the neural network will lead to a high rate of false positives and negative negatives, resulting in low slag alarm rate. Stable, it can reach more than 80% when the site conditions are good, and only 70% when the site is not good, which cannot meet the 95% requirements of general steel mills

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