Device and method for measuring thickness of covering slag and liquid level fluctuation of molten steel

Abstract

The invention relates to a device and a method for measuring the thickness of covering slag and the liquid level fluctuation of molten steel. The device consists of a handle, a density board and a probe, wherein the handle is arranged in the middle part of the upper surface of the density board, and the probe is fixed on the lower surface of the density board; the handle is made of materials which are difficult to combust and melt such as iron sheets, battens and the like; the density board is made of heat-insulating materials such as wood boards and the like; and the probe is made of iron wires. The device and the method have the advantages that the device and the method can accurately measure the thicknesses of a molten slag layer at various positions on a liquid level of a crystallizer, the average value of the thicknesses and the liquid level fluctuation to achieve the aims of accurately controlling a melting structure of the covering slag and reducing the liquid level fluctuation, thereby reducing the inclusion of casting blanks, improving the quality of the casting blanks, and ensuring the steady operation of the production.

Description

technical field [0001] The invention relates to a device and method for measuring the thickness of mold slag and the fluctuation of liquid steel level. Background technique [0002] With the development of science and technology, the requirements for steel quality are getting higher and higher. On the one hand, the application of liquid level control technology can improve the control accuracy of the liquid steel level in the mold and the quality of the slab. On the other hand, it can also greatly improve the working environment of the tundish operators and reduce the accident rate in the casting process. Fluctuations in the liquid level of the crystallizer will cause mold slag to be involved in the molten steel, causing quality problems in the slab, and in severe cases, steel leakage or overflow. Mold liquid level detection mainly includes isotope type, electromagnetic type, eddy current type, laser type, thermocouple type, ultrasonic type, industrial television method, et...

AI Technical Summary

Problems solved by technology

The above detection method can only detect the longitudinal fluctuation of a certain point of the molten steel surface, but the fluctuation of the liquid level has a certain continuity and randomness, so it is difficult to capture the maximum value of the fluctuation of the entire liquid level

[0003] The current method of measuring the thickness of the liquid slag layer generally adopts the detection method, such as "A Mold Mold Flux Detection Tool and Its Detection Method" (application number 200410089438.8), this method is to detect a certain point of the liquid slag layer For measurement, the measurement position is relatively random, and it is greatly affected by human factors

The operator’s measurement position and probe angle will have a great impact on the measurement results. If the maximum value of liquid level fluctuations cannot be measured, the operator will not be able to accurately and timely grasp the melting state of the mold powder. The adjustment of production process parameters has a A certain hysteresis, in severe cases, will have a certain adverse effect on the smooth flow of production

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