Secondary cooling water distribution advanced control method for billet continuous casting machine

Abstract

The invention discloses a secondary cooling water distribution advanced control method for a billet continuous casting machine for controlling billet drawing speed, medium ladle molten steel temperature and secondary cooling water distribution quantity. The method comprises the following steps of: treating the billet drawing speed parameter in a specified time interval by adopting an effective drawing speed method, and changing the given water quantity when the fluctuation of the drawing speed exceeds a specified range to prevent over high fluctuation of the surface temperature of a casting blank so as to ensure a delay between the change of the water quantity of a cooling loop and the change of the drawing speed; and aiming at the condition that the casting temperature possibly has high fluctuation, correcting the given water quantity of each section of a secondary cooling zone by using the medium ladle molten steel temperature or overheating degree as a feed-forward signal, and dynamically calculating the water distribution quantity of each section of the secondary cooling zone; therefore, the secondary cooling water distribution control of the billet continuous casting machine is realized through the steps. The method can prevent over high fluctuation of the surface temperature of the casting blank, and can dynamically calculate the water quantity of each section of the secondary cooling zone so as to overcome the defect of the traditional cooling water quantity-drawing speed setting method.

Description

technical field [0001] The invention relates to the technical field of blast furnace automatic control, in particular to an advanced control method for secondary cooling water distribution of 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 sh...

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 method for the billet continuous casting machine in view of the influence of the billet casting speed and the temperature fluctuation of the tundish molten steel on the secondary cooling water distribution, so as to provide the billet continuous casting machine Create conditions for high output and low consumption

Images