Advanced secondary cooling water control system of billet continuous casting machine

Abstract

The invention discloses an advanced secondary cooling water control system of a billet continuous casting machine, which is a feedforward secondary cooling water control system based on the continuous temperature measurement in tundish. The control system is a casting speed and superheat-degree feedforward open-loop control system, and comprises a casting temperature liquidus temperature module and a casting speed correlation coefficient module, wherein the casting temperature liquidus temperature module is connected with the input end of a comparer by a correlation coefficient module, and the casting speed correlation coefficient module is connected with the input end of the comparer by a secondary cooling water model module. The comparer takes the differences between the casting temperature compensation water quantity and the supplementary water quantity obtained by the effective casting speed calculation, and the practical flow value obtained from the field flow detection as the input of a PID (Proportional Plus Integral Plus Derivative Controller) controller; the output of the PID controller controls the opening degree of a field regulating valve to regulate the field secondary cooling area water flow and finally to ensure the ejection temperature within the preset range of the process. The invention can prevent the surface temperature of a cast blank from generating overlarge fluctuation, and can dynamically calculate each section water quantity of the secondary cooling so as to create conditions for the stability, the smooth running, the high yield and the low consumption of the billet continuous casting machine.

Description

technical field [0001] The invention relates to the technical field of blast furnace automatic control, in particular to a secondary cooling water distribution control system for billet continuous casting machines. It mainly involves the accurate and stable control of the water distribution in each zone in the secondary cooling water distribution system of the billet continuous casting machine, and eliminates the influence of the pouring temperature change on the quality of the billet. Background technique [0002] The metallurgical industry is one of the pillar industries of the national economy, and continuous casting is an important part of its production process. The structure of the continuous casting equipment currently used is as follows: figure 1 Shown: including ladle 1, molten steel continuous temperature detector 2, submerged nozzle 3, tundish 4, crystallizer 5, meniscus 6, support roller 7, liquid phase 8, secondary cooling zone 9, solidification shell 10, Meta...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a secondary cooling water distribution control system for the billet continuous casting machine in view of the influence of the casting speed and the temperature fluctuation of the tundish molten steel on the secondary cooling water distribution. Create conditions for high production and low consumption

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