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Method for online adjusting width decrease of crystallizer continuously

A mold and width adjustment technology, applied in the field of on-line width adjustment of continuous casting molds, can solve the problems of reducing the output of casting slabs, waste of raw materials, and discontinuous processes, and achieve the goal of improving market competitiveness, improving production quality, and improving adjustment. The effect of wide speed

Active Publication Date: 2013-11-20
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the continuous casting machine is shut down and started pouring for the second time, the above operations on the one hand affect the production rhythm of the steel plant and reduce the output of slabs;
At present, there is also online crystallizer width adjustment technology. However, in the traditional online width adjustment process, the consistent speed of the upper and lower ports of the crystallizer will lead to large-scale width adjustment. Intermittent taper adjustment is required, resulting in discontinuous process and affecting the width adjustment efficiency.

Method used

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  • Method for online adjusting width decrease of crystallizer continuously
  • Method for online adjusting width decrease of crystallizer continuously
  • Method for online adjusting width decrease of crystallizer continuously

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The taper on one side of the crystallizer is 9mm, the taper reduction during the width adjustment process is 30mm, and the width adjustment acceleration at the top of the crystallizer is set at 20mm / min 2 , the casting speed is 1.0m / min, the height of the mold is 900mm, the height of the meniscus is 800mm, the time for molten steel to go from the meniscus to the exit of the mold is 0.8min, and the initial taper rate of the mold is 1.03% / m. Width adjustment, the width is reduced by 400mm, and the corresponding width adjustment process speed, time and wedge length relationship are obtained.

[0060] From the above analysis, it can be seen that if the width is adjusted on both sides of the crystallizer, the width of the single side adjustment is 200mm, that is, L=200mm. Correspondingly, ΔT=30mm, a=20mm / min 2 , t 0 =0.8min, T%=1.03%m, l=800mm, V c =1.0m / min=1000mm / min. Therefore, the control parameters are:

[0061] 1. Cone adjustment time t 1 :

[0062] ...

Embodiment 2

[0077] The one-side taper of the crystallizer is 6mm, the taper reduction during the width adjustment process is 15mm, and the width adjustment acceleration of the upper mouth of the mold is set at 15mm / min 2 , the casting speed is 1.0m / min, the height of the mold is 900mm, the height of the meniscus is 800mm, the time for molten steel to go from the meniscus to the exit of the mold is 0.8min, and the initial taper rate of the mold is 1.25% / m. Width adjustment, the width is reduced by 200mm, and the corresponding width adjustment process speed, time and wedge length relationship are obtained.

[0078] From the above analysis, it can be seen that if the width is adjusted on both sides of the crystallizer, the width of the single side adjustment is 100mm, that is, L=100mm. Correspondingly, ΔT=15mm, a=15mm / min 2 , t 0 =0.8min, T%=1.25%m, l=800mm, V c =1.0m / min=1000mm / min. Therefore, the control parameters are:

[0079] 1. Cone adjustment time t 1 :

[0080] ...

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Abstract

The invention discloses a method for online adjusting the width decrease of a crystallizer continuously, which relates to online width adjustment of a continuous casting crystallizer. Based on a solidification process of high temperature molten steel, starting from solidifying contraction of a blank shell, the method comprises the steps of: guiding the width decrease process of the crystallizer to the online width adjustment process; rapidly determining control parameters of the width adjustment process, wherein the control parameters include width adjustment time, width adjustment acceleration, width adjustment speed and total time of width adjustment process; and guiding the continuous casting crystallizer to perform online continuous width adjustment operation so as to realize online rapid width adjustment process of the crystallizer. The method provided by the invention is simple and feasible and provides a rapid way for the online thermal state width adjustment (width decrease) process in continuous casting production so as to meet the requirement on changing the size of a production casting blank online in continuous casting.

Description

technical field [0001] The invention relates to online width adjustment of a continuous casting crystallizer, in particular to a method for continuously adjusting the width reduction of the crystallizer on-line. Background technique [0002] As the core component of the continuous casting machine, the structure and performance of the mold directly affect the quality of the cast slab and the adaptability of the steel type. In order to adapt to the frequently changing requirements of continuous casting and rolling production, the width of the crystallizer often needs to be adjusted to obtain slabs of different sizes. When the traditional continuous casting machine changes the size of the slab, the method used is to stop casting, manually adjust the width of the mold or change the width by replacing the mold. When the continuous casting machine is shut down and started pouring for the second time, the above operations on the one hand affect the production rhythm of the steel p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/05B22D11/18B22D11/057
Inventor 徐永斌马春武幸伟徐海伦孙铁汉李智杜斌叶理德邵远敬
Owner WISDRI ENG & RES INC LTD
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