Method and device for dynamically controlling whole process of converter blowing

Abstract

The invention discloses a method for dynamically controlling the whole process of converter blowing. The method comprises the following steps: detecting flame and flue gas in the blowing process of a converter; controlling the splashing phenomenon on the basis of analysis of the flame and the flue gas; controlling the drying phenomenon on the basis of analysis of the flame and the flue gas; controlling lifting of an oxygen lance to activate slag on the basis of analysis of the flame in the later period of converter blowing; and on the basis of the predicted real-time temperature and real-time carbon content before the converter blowing end point, controlling the lowering amplitude of the oxygen lance, and lifting up the oxygen lance to end blowing when the real-time temperature is close to the target temperature and the real-time carbon content is close to the target carbon content. According to the method, the operation can be correspondingly and dynamically adjusted on the basis of flue gas analysis and flame analysis results, so that splashing and drying in the converter blowing process are effectively controlled, and it is guaranteed that molten steel components at the end point of the converter are hit. The invention further discloses a device for dynamically controlling the whole process of the converter blowing.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, in particular to a method and device for dynamic control of the whole process of converter blowing. Background technique [0002] In the field of iron and steel smelting, converter blowing is the process of blowing oxygen into the converter to make it chemically react with molten iron, scrap steel and various auxiliary materials in the furnace, and finally make the temperature and composition of the molten steel in the furnace meet the requirements for tapping. Converter automatic blowing is to use the set blowing model and control mode instead of manual experience to control the converter blowing. In the process of automatic steelmaking, controlling the stability of the blowing process is a very important part. The stability of the blowing process means that during automatic blowing, the occurrence of "splash" and "drying back" should be avoided as much as possible, so that the s...

AI Technical Summary

Problems solved by technology

[0003] However, the existing automatic steelmaking of converters is based on the static operation model. This type of static operation model is based on the principle of metallurgical technology and combined with the actual smelting operation of the steel plant. Blowing mode, this type of static operation mode is uniform and stable, but lacks adaptability, that is, it cannot make corresponding adjustments according to changes in the situation, but converter steelmaking is a complicated production process, and there are many unknown and unpredictable Therefore, the simple static operation model is difficult to deal with all smelting situations, especially the splashing and back-drying during the smelting process caused by the unstable raw materials entering the furnace. It can be seen that the existing The technology based on the static operation model is not smart enough, and the control of the blowing is not stable

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