Method and system for controlling casting blank of slab casting machine

A slab continuous casting and slab technology, which is applied in the field of slab casting machine slab control, can solve problems such as slab retention, production, operation, equipment, quality, and cost impact

Active Publication Date: 2020-05-22
BEIJING SHOUGANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current slab continuous casting process, the slab retention phenomenon (referred to as stagnation slab) often occurs, which has a great impact on production, operation, equipment, quality and cost.

Method used

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  • Method and system for controlling casting blank of slab casting machine
  • Method and system for controlling casting blank of slab casting machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a slab caster control method for the slab continuous casting process section, the slab continuous casting process section includes a fan-shaped process section, and the inner and outer arcs of the fan-shaped process section exist at the same time tension leveling machine, see figure 1 , the method includes:

[0041] S101. During the continuous casting process of the slab continuous casting process section, obtain in real time the roll gap deviation value of the driving roll, the roll gap deviation value of the driven roll, the deviation of the inner and outer arc tension correction force, and the difference between the inner and outer arc tension correction force of the sector-shaped process section value ratio;

[0042] S102. Judging whether it is satisfied: the gap deviation of the driving roller is ≤±2mm, the gap deviation of the driven roller is ≤±0.5mm, the deviation of the inner and outer arc tension correction force is ≤100kN, and the ra...

Embodiment approach

[0061] It should be noted that, even if the control is carried out according to the method of this embodiment, if the monitoring fault exceeds the control fault, etc., it may still lead to the occurrence of the stagnation phenomenon. Therefore, it is necessary to carry out early warning of the stagnation phenomenon. The method also includes:

[0062] Real-time monitoring of the deviation between the length measurement of the tension leveler and the length measurement of the measuring wheel;

[0063] If the deviation between the measured length of the tension leveling machine and the measured length of the measuring wheel is ≥0.5m or the running length of the slab measured by the slab measuring wheel is 0 within 30s, it is judged that the slab caster is stuck.

[0064] When slab stagnation occurs, the following measures can be taken for emergency treatment to prevent the slab from lying: (1) after the slab is stagnant, cancel the equal distribution function of the tension and s...

Embodiment 2

[0069] Based on the same inventive concept as in Embodiment 1, this embodiment provides a slab caster control system for the slab continuous casting process section. The slab continuous casting process section includes a fan-shaped process section. There are tension levelers in the inner and outer arcs of the fan-shaped process section at the same time, see figure 2 , the system includes:

[0070] The acquisition module is used to acquire the driving roll gap deviation value, the driven roll roll gap deviation value, the inner and outer arc tension correction force deviation and the inner and outer arc tension deviation of the fan-shaped process section in real time during the continuous casting process of the slab continuous casting process section. Corrective force difference ratio;

[0071] A judging module, used to judge whether the following requirements are met: the gap deviation of the driving roller ≤ ± 2mm, the gap deviation of the driven roller ≤ ± 0.5mm, the devia...

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Abstract

The invention discloses a method for controlling a casting blank of a slab casting machine. The method comprises the following steps: in the continuous casting process of a slab continuous casting process section, obtaining a roller gap deviation value of a driving roller, a roller gap deviation value of a driven roller, the inner and outer arc pulling and straightening force deviation and the inner and outer arc pulling and straightening force difference ratio of a sector process section in real time; judging whether the roller gap deviation of the driving roller is smaller than or equal to + / -2 mm, the roller gap deviation of the driven roller is smaller than or equal to + / -0.5 mm, the inner and outer arc pulling and straightening force deviation is smaller than or equal to 100 kN, and the pulling and straightening force difference ratio is smaller than or equal to 60%; and if not, controlling that the roller gap deviation of the driving roller is smaller than or equal to + / -2 mm, the roller gap deviation of the driven roller is smaller than or equal to + / -0.5 mm, the inner and outer arc pulling and straightening force deviation is smaller than or equal to 100 kN, and the pullingand straightening force difference ratio is smaller than or equal to 60%. The control method is not only simple, but also remarkable in slab lag prevention effect, and can ensure the stability of thecontinuous casting process and reduce the production cost.

Description

technical field [0001] The invention relates to the technical field of continuous casting of slabs, in particular to a method and a system for controlling a slab of a slab caster. Background technique [0002] Slab continuous casting is a continuous casting steelmaking technology with slab as the main product. Slabs with a width-thickness ratio greater than 3 are called slabs, and continuous casting and rolling steel slabs are mainly used for rolling flat plates (thick plates, medium plates, thin plates, and coils). In the current slab continuous casting process, the phenomenon of slab retention (referred to as stagnation slab) often occurs, which has a great impact on production, operation, equipment, quality, and cost. Therefore, there is an urgent need for a control method that can prevent slab stagnation in the slab continuous casting process. Contents of the invention [0003] The embodiment of the present application provides a method and system for controlling the...

Claims

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Application Information

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IPC IPC(8): B22D11/20
CPCB22D11/208
Inventor 李志军毕泽阳刘珍童刘风刚朱建强贾建生崔丛义刘建斌
Owner BEIJING SHOUGANG CO LTD
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