Device and method for controlling cold-rolling steel strip pickling turbulence

Abstract

The invention relates to a device and a method for controlling cold-rolling steel strip pickling turbulence. In the device, the inlet end of a pressure gauge is connected with a lateral jet acid valve connected to a main jet acid tube, and the outlet end of the pressure gauge is connected with a lateral jet acid tube; and the lateral jet acid valve and the pressure gauge are connected with an external computer respectively. According to quality of steel strip, the optimal pickling temperature is determined and the relationship between the steel strip speed and the turbulence degree is set; the numeric conversion and the automatic control are completed by three functional blocks PLI10, ADC and PIC of the computer respectively; by automatically adjusting the lateral jet acid valve and the pressure gauge, the dynamic control of the pickling turbulence degree of the steel strip is realized, the overpickling of the steel strip is avoided, and the surface quality of the cold-rolling plate is improved; the equipment damage due to the broken band of a rolling mil is reduced, the yield of the cold-rolling plate and the operating rate of the rolling mill are improved, and several million yuan can be saved annually.

Description

technical field [0001] The invention belongs to the technical field of cold-rolled pickling, and in particular relates to a device for controlling pickling turbulent flow of cold-rolled strip steel and a control method thereof. Background technique [0002] The cold-rolled strip turbulent pickling technology was developed by the German MDS company in 1983 and applied to the German market in 1984. The turbulent pickling technology is suitable for pickling of cold-rolled low-carbon steel plates and cold-rolled silicon steel plates. deal with. Because of its short pickling time, high heat transfer efficiency, and less strip residue after washing, it is widely used in cold rolling mills in Germany, Japan and other countries. my country has introduced turbulent flow pickling technology since the 1990s. Compared with shallow tank pickling used before, turbulent flow pickling can greatly improve the quality and speed of strip steel pickling. [0003] However, in the actual applic...

AI Technical Summary

Problems solved by technology

As a result, the phenomenon of over-pickling of the strip will inevitably be caused.

[0005] After searching, so far, the research on pickling has mainly focused on the design and manufacture methods of various pickling equipment, and the analysis of hot rolling raw materials and acid solution process parameters on the pickling effect of strip steel, and there is no research on turbulence control. Documentation and related reports

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