Audio-frequency noise acquisition apparatus arranged at slagging furnace mouth of converter

Abstract

The invention relates to an audio-frequency noise acquisition apparatus arranged at a slagging furnace mouth of a converter, and the apparatus is used in a noise analysis system. The apparatus comprises an acquisition box and a pickup arranged in the acquisition box; a circulating water drum is arranged out of the acquisition box, one side of the acquisition box is provided with a directing steel pipe that is communicated with a cavity in the acquisition box, the acquisition box is also provided with an air inlet which is used for conveying air into the acquisition box, and a sound filter is provided at the air inlet; a reflecting plate which is used for reflecting sound and absorbing thermal radiation is arranged in the acquisition box at a position opposite to the center line of the directing steel pipe, the reflecting plate and the center line of the directing steel pipe forms an included angle, and the pickup is located on a symmetric line of the center line of the directing steel pipe, with the normal of a reflection plane being a symmetrical axis of the symmetric line and the center line of the directing steel pipe. According to the invention, interference of ambient noise is effectively avoided, thermal radiation on the pickup is reduced, and flue dust and corrosive gas are prevented from entering into the acquisition box; therefore, it is guaranteed that the acquisition box can accurately and stably acquire slagging noise at a furnace mouth, accuracy of an analysis system of a slagging state during steel-making of a converter is improved, possibility of occurrence of splashing is substantially lowered down, and steel-making efficiency is enhanced.

Description

technical field [0001] The invention relates to the technical field of audio noise analysis of converter steelmaking slag, in particular to an audio noise acquisition device for converter slag opening used in a noise analysis system. Background technique [0002] Sputtering and back-drying should be avoided in the process of converter steelmaking slag. Generally, skilled kiln workers judge the noise of slag melting. However, the working status of human beings is unstable and automatic steelmaking cannot be realized. At present, the audio frequency slag removal method is often used to monitor the slag removal process, that is, the computer imitates the human judgment of the slag removal state, and the noise generated during the slag removal process is collected at the furnace mouth of the steelmaking converter and analyzed by the audio slag removal device. Because the temperature of the furnace mouth is very high, the pickup is installed in the noise collection box on the sid...

AI Technical Summary

Problems solved by technology

[0004] 1. The heat radiation from the furnace mouth of the converter directly irradiates the pickup in the noise collection box through the steel pipe, so that the working temperature of the pickup is still much higher than the rated temperature, resulting in distortion of the response curve, rapid aging, and reduced sensitivity;

[0005] 2. A large amount of smoke and corrosive gas generated during the slag removal process will enter the noise collection box through the steel pipe, affecting the sensitivity of the pickup;

[0006] 3. The environmental noise in the steelmaking site is very strong, such as driving operation and other converter feeding operations will generate strong audio noise, which can be introduced into the interior through the noise collection box wall and circulating water, interfering or even covering the furnace mouth noise;

[0007] 4. Since the inner wall of the steel pipe is very smooth, other environmental noise can also reach the pickup through several reflections, causing interference

[0008] The above problems lead to the inaccuracy of the collected noise signals, and the results obtained from the analysis and processing are not reliable and there are large errors

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