Steel ladle bottom blowing dusting bleed-out detection device and bleed-out detection method

Abstract

The invention discloses a steel ladle bottom blowing dusting bleed-out detection device and a bleed-out detection method, belonging to the technical field of steel refining. The detection device comprises a steel ladle bottom dusting element, a signal collecting circuit, a signal amplifying circuit, a processor and a warner. The detection method comprises the following steps: when the detection device is in work, firstly collecting voltage and current signals, and magnifying the voltage signal; analyzing the digital voltage signal: if the bleed-out depth h is more than or equal to the critical bleed-out depth hc of the system, generating non-reversal continuous bleed-out, starting a warning system, enhancing the blowing intensity, finishing smelting immediately, and exchanging the dusting element; and if the bleed-out depth h is less than the critical bleed-out depth hc of the system, generating reversible continuous or non-linear bleed-out, enhancing blowing intensity, increasing the pressure of a gap, and spraying the liquid steel seeping in the gap out of the gap. According to the invention, the problem that bleed-out detection is difficult under the wicked work environment is overcome, and work is not influenced by dusting; the safety of the entire dusting process can be detected, and the leakage condition of the liquid steel is tracked and predicated, thereby avoiding a bleed-out accident.

Description

technical field [0001] The invention belongs to the technical field of iron and steel refining, and in particular relates to a steel breakout detection device and a steel breakout detection method by spraying powder at the bottom of a ladle. Background technique [0002] Ladle bottom spraying powder refining is an emerging new technology with creativity and broad application prospects. However, since the working environment of ladle bottom spraying is worse than that of ladle bottom blowing argon mixing, the ladle bottom spraying process faces many technical problems after it is proposed. to be solved. At present, in the powder spraying process, the slit-type powder spraying element is mainly used to realize the bottom powder spraying. In normal blowing smelting, in order to spray the powder into the molten pool of the ladle with a certain kinetic energy, the gap of the powder spraying element must have a certain width. The safety of the powder-spraying components deviates ...

AI Technical Summary

Problems solved by technology

[0003] The powder spraying element is in a high-temperature and harsh working environment, not only eroded by high-temperature molten steel, but also severely eroded by the powder airflow. It is extremely difficult to detect the leakage of molten steel in the gap of the powder spraying element. It is difficult to grasp the leakage of liquid by visual inspection. It has been widely used to measure the leakage of steel and the loss of injection components through the furnace bottom detector. Since this kind of detector needs to stop the furnace, it takes time and trouble to affect the production, and it has basically been used. disuse

At present, the method of predicting the melting loss of the blowing element applied to the converter is to embed several pairs of thermocouples at different heights of the blowing element, each pair is separated by a certain distance, and the compensation wire is connected to the instrument through the terminal box. Display and record the temperature of each pair of thermocouples, when the temperature of a certain pair of thermocouples is too high, it will display and record an alarm. By using this kind of instrument, the operator can systematically grasp the temperature of each pair of thermocouples in the process of smelting each furnace of steel , so as to grasp the melting loss law and melting loss status of the powder spraying element, so as to take corresponding measures, but this kind of instrument cannot be well used in the detection of molten steel leakage, and the molten steel in the gap of the powder spraying element in working use Leak detection is not yet possible

At present, the research on the leakage of molten steel in the gaps of powder spraying components mainly stays at the level of theoretical analysis and anatomical analysis of powder spraying components after use or experiments. The detection of molten steel leakage in the gaps of air permeable bricks in use is still a a technical problem

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