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Method and device for improving quality of slab tail blank

A tail blank and quality technology, applied in the field of continuous casting, can solve the problems of high scrap rate, internal quality and surface quality of slab tail blank cannot be guaranteed, etc.

Active Publication Date: 2018-04-13
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the problems existing in the prior art, the embodiment of the present invention provides a method and device for improving the quality of the slab tail blank, which is used to solve the internal quality and surface quality of the slab tail blank in the continuous casting process in the prior art. Can not be guaranteed, leading to technical problems with high scrap rate

Method used

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  • Method and device for improving quality of slab tail blank
  • Method and device for improving quality of slab tail blank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This embodiment provides a method for improving the quality of the slab tail stock, such as figure 1 As shown, the method includes:

[0039] S101, acquiring the actual running speed of the continuous casting machine, and judging whether the actual running speed is greater than the reference speed;

[0040] In this step, the required deceleration is different when the actual running speed is higher than the reference speed and when the actual running speed is lower than the reference speed. Therefore, when the last furnace stops pouring for 10 minutes, it is necessary to obtain the actual running speed of the continuous casting machine, and judge whether the actual running speed is greater than the reference speed; thereby determine the deceleration, and the reference speed is 1.2m / min.

[0041] S102. If the actual running speed is greater than the reference speed, control the continuous casting machine to decelerate to the reference speed according to a first decelerat...

Embodiment 2

[0054] Corresponding to Embodiment 1, this embodiment provides a device for improving the quality of the slab tail, such as figure 2 As shown, the device includes: a judging unit 21, a first control unit 22, a second control unit 23, a third control unit 24 and a fourth control unit 25; wherein,

[0055] When the actual running speed is higher than the reference speed, and when the actual running speed is lower than the reference speed, the required deceleration is different. Therefore, when the last furnace stops pouring for 10 minutes, the judging unit 21 needs to obtain the actual running speed of the continuous casting machine, and judge whether the actual running speed is greater than the reference speed; thereby determine the deceleration, and the reference speed is 1.2m / min .

[0056] Correspondingly, the first control unit 22 is used to control the continuous casting machine to decelerate to the reference speed according to the first deceleration when the actual runn...

Embodiment 3

[0066] In actual application, when using the method provided in Embodiment 1 and the device provided in Embodiment 2 to cast slabs, the details are as follows:

[0067] In the continuous casting process, the required deceleration is different when the actual running speed is higher than the reference speed and when the actual running speed is lower than the reference speed. Therefore, when the last furnace stops pouring for 10 minutes, it is necessary to obtain the actual running speed of the continuous casting machine, and judge whether the actual running speed is greater than the reference speed; thereby determine the deceleration, the reference speed is 1.2m / min, and the The actual running speed is 1.4m / min.

[0068] Here, because the actual running speed is greater than the reference speed, the continuous casting machine is controlled to decelerate to the reference speed according to the first deceleration; the first deceleration is 0.05m / min 2 .

[0069] After the actua...

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Abstract

The invention provides a method and a device for improving the quality of a slab tail blank. The method comprises that a actual running speed of a continuous casting machine is obtained, whether the actual running speed is larger than a reference speed is judged, if the actual running speed is larger than the reference speed, and the continuous casting machine is controlled to be decelerated to the reference speed according to a first deceleration speed; based on a preset second deceleration speed and a preset first deceleration interval, the reference speed is controlled to be gradually reduced to a first speed and stayed around the preset first time; based on the second deceleration speed and a preset deceleration interval, the reference speed is controlled to be gradually reduced to a second speed and stayed around a preset second time; wherein the first deceleration interval comprises 0.2 m / min, the reference speed is 1.2 m / min, and the first deceleration speed is 0.05 m / min2.

Description

technical field [0001] The invention belongs to the technical field of continuous casting, and in particular relates to a method and a device for improving the quality of a slab tail blank. Background technique [0002] In the continuous casting process, shrinkage cavities and center cracks in the tail slab of the slab are common internal quality defects of the tail slab, which can only be scrapped in the end, resulting in a lot of waste. [0003] In the process of continuous casting, if the casting speed fluctuates too much, it will affect the fluctuation of liquid level, and it is easy to cause mold slag to be involved in the billet. Therefore, how to improve the surface quality on the premise of ensuring the internal quality of the tail blank is a common problem and technical difficulty in the steelmaking production department. Contents of the invention [0004] In view of the problems existing in the prior art, the embodiment of the present invention provides a method...

Claims

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Application Information

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IPC IPC(8): B22D11/20
CPCB22D11/20
Inventor 王皓刘延强张鹏李峰何文远安泽秋周绍轩罗磊杨晓山赵长亮袁天祥
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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