Dynamic light pressing control method

Abstract

The invention discloses a controlling method under dynamic light pressure in the continuous casting field. The method is capable of effectively reducing adjusting order number in the light pressure state at the same time when ensuring that the area follows the position of plate blanks and liquid core under light pressure, thereby reducing the disadvantageous effects of the plate blank quality due to frequent adjustment of states under pressure. In every controlling cycle, the method is first based on the equation of heat conduction and calculates the temperature distribution of the continuous casting plate blanks, confirms the solidification rate of each point of the plate blanks, and primarily confirms the state under the current expected light pressure and the time of state switching under pressure. Then according to the peospective casting speed and the bakie temperature of each cut film, when the cut films are produced, the position change of the liquid core point equipped with the appointed solidification rate in the state of under-pressure and in the switching cycle is forecast. At last, based on the forecasting of the peospective position of the liquid core point with appointed solidification rate, relative adjusting strategy under light pressure is adopted.

Description

technical field [0001] The invention relates to a soft reduction control method in the field of continuous casting, in particular to a dynamic soft reduction control method. Background technique [0002] In continuous casting production, there are generally defects such as center segregation, center looseness and internal cracks inside the slab, which affect the internal quality of the slab. In order to improve the quality of the slab, people have developed a series of technical methods to suppress problems such as center segregation and internal cracking. Among them, the soft reduction technology has been verified by production practice and is one of the most effective and economical methods. [0003] Soft reduction technology is a technique for slightly compressing the slab during a certain stage of the continuous casting process. Usually, a section of the slab whose solidification rate is within a specified range is lightly reduced. On the one hand, it can compensate t...

AI Technical Summary

Problems solved by technology

[0012] The existing dynamic soft reduction control method cannot meet the principle requirement of "adjusting the reduction area as much as possible at one time"

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