Image recognition based molten iron KR stirring and desulfurizing method

Abstract

The invention discloses an image recognition based molten iron KR stirring and desulfurizing method which concretely comprises the following steps of 1) collecting molten iron weight and molten iron temperature measurement sampling analysis results, and calculating a stirring time tau, a feeding amount w of a desulfurizing agent, an elevation H of a liquid level of the molten iron, a insertion depth h0 of a stirrer and an elevation h=H-h0 of the bottom surface of the stirrer; 2) adjusting a stirring rotating speed through a monitoring picture of a high-definition video system; 3) after feeding of the desulfurizing agent is finished, the stirring rotating speed is adjusted through the monitoring picture of the high-definition video system; and 4) as a service time of the stirrer progresses, the stirring rotating speed is continuously adjusted until service of the stirrer is ended. In the image recognition based molten iron KR stirring and desulfurizing method, by online monitoring thecharacteristic parameters of a stirring vortex liquid surface shape and a mutual position relation between the stirring vortex liquid surface shape and a stirrer blade through a high-definition video,so that real-time control on the reaction dynamics conditions in the whole process of molten iron desulphurization and stirring is realized, and a whole-course visual monitoring means for actual production operation is provided.

Description

technical field [0001] The invention relates to a method for desulfurizing molten iron, in particular to an image recognition-based KR stirring method for desulfurizing molten iron with high efficiency and low consumption. Background technique [0002] Sulfur is one of the main harmful elements in iron and steel products (except for sulfur-containing steel types), and molten iron slag is one of the key factors affecting the economics of converter smelting technology. Therefore, sulfur in steel and molten iron slag entering the furnace must be removed as much as possible. To meet the high-efficiency smelting requirements of high-quality steel. For this reason, as early as the 1970s, hot metal desulfurization pretreatment and slag removal technology was applied on a large scale, and a comprehensive hot metal desulfurization pretreatment and slag removal technology featuring hot metal injection desulfurization or KR mechanical stirring desulfurization and mechanical slag remova...

AI Technical Summary

Problems solved by technology

[0006] To sum up, in order to improve the desulfurization effect of molten iron mechanical stirring, in order to improve the stirring mixing characteristics and improve the kinetic conditions of desulfurization reaction, many scholars have carried out a lot of theoretical research and practice, and some research results have achieved good results in actual production. However, due to the complexity of the multi-phase and large eddy current pyrometallurgical reaction process of molten iron KR stirring desulfurization, and the difficulty of detection and monitoring of the closed stirring process, the influence of process parameters on the stirring and mixing state cannot be known, and can only be based on historical data and statistical analysis The fuzzy law of process parameters (mainly stirring power) on desulfurization technical and economic indicators makes it difficult for KR stirring desulfurization process to avoid human interference caused by manual operation

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