Online adjusting method for extensively reducing width of continuous casting mold

A continuous casting mold and width reduction technology, which is applied to the field of large-scale continuous casting mold online thermal adjustment width reduction, can solve the problems of affecting the production rhythm of steel mills, unfavorable use of equipment, and reducing the output of slabs, etc. Metal yield, ease of operation, improved productivity and efficiency

Active Publication Date: 2011-11-16
中国冶金科工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the continuous casting machine shuts down and starts pouring for the second time, on the one hand, it will affect the production rhythm of the steel plant and reduce the output of casting slabs; on the other hand, the shutdown and casting will also cause waste of raw materials and increase production costs
In addition, the traditional online width adjustment technology, due to the speed difference between the upper and lower ports of the crystallizer, the instantaneous pressure change of the hydraulic cylinder during the width adjustment process will cause a sharp increase and decrease in the width adjustment speed, which is not conducive to the use of equipment.

Method used

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  • Online adjusting method for extensively reducing width of continuous casting mold
  • Online adjusting method for extensively reducing width of continuous casting mold
  • Online adjusting method for extensively reducing width of continuous casting mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The taper on one side of the mold is 6 mm, the taper variable in the width adjustment process is 6 mm, the casting speed is 1.2 m / min, the mold height is 900 mm, the meniscus height is 800 mm, the width is reduced by 86 mm when both sides are widened , to get the corresponding width adjustment process speed, time and wedge length relationship.

[0048] From the above analysis, it can be seen that the width of the crystallizer is adjusted on both sides, and the width of the single side is 43 mm. The relevant parameters in the process of width adjustment can be set as:

[0049] tanα=6 / 900, tanθ=(6-6) / 900, V c =1200 mm / min, l =800 mm, Δl= 6mm, W=43mm

[0050] therefore:

[0051] 1. Width adjustment speed:

[0052] (1)

[0053] 2. Widening time:

[0054] (2)

[0055] 3. Length of wedge segment:

[0056] (3)

[0057] In this embodiment, during the width adjustment process, the time displa...

Embodiment 2

[0059] The taper on one side of the mold is 8.4 mm, the taper variable in the width adjustment process is 7.2 mm, the casting speed is 1.1 m / min, the mold height is 900 mm, the meniscus height is 800 mm, and the width is reduced by 44 mm when the width is adjusted on both sides. Obtain the corresponding width adjustment process speed, time and wedge segment length relationship.

[0060] From the above analysis, it can be seen that the width of both sides of the crystallizer is adjusted, and the width of one side is 22 mm. The relevant parameters in the process of width adjustment can be set as:

[0061] tanα=8.4 / 900, tanθ=(8.4-7.2) / 900, V c =1100 mm / min, l =800 mm, Δl= 7.2mm, W=22mm

[0062] therefore:

[0063] 1. Width adjustment speed:

[0064] (1)

[0065] 2. Widening time:

[0066] (2)

[0067] 3. Length of wedge segment:

[0068] (3)

[0069] In this embodiment, duri...

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Abstract

The invention discloses an online adjusting method for extensively reducing the width of a continuous casting mold, particularly comprising the steps of: with the solidifying contraction of a blank shell as a start point, leading the width reducing process of the casting mold into the online width adjustment process, wherein the process is for reducing the width; rapidly determining control parameters of the width adjustment process, wherein the parameters comprise a width adjusting speed, width adjusting time and a wedge section length; directing the online width adjustment process of the continuous casting mold according to the parameters so as to realize the extensive online adjustment process, wherein the process is for reducing the width. In the method, in consideration of the solidifying contraction characteristic of the casting blank, the frictional force of the casting blank to a copper plate is slowed, therefore, the method is easy and feasible and convenient to operate, and has the advantages of reducing the production cost, improving the product quality, and synchronously providing a feasible way for the high-efficiency casting production, improvement of the production capacity and efficiency of the continuous casting machine, and increase of the metal efficiency.

Description

technical field [0001] The invention relates to the technical field of on-line width adjustment of a continuous casting crystallizer, in particular to a process of reducing the width of a large-scale continuous casting mold on-line thermal adjustment. Background technique [0002] The continuous casting mold is the core component of the continuous casting machine, and its structure and performance directly affect the quality of the 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 shuts down and starts pouring for the second time, on the one hand, it will aff...

Claims

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Application Information

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IPC IPC(8): B22D11/05B22D11/16
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 中国冶金科工股份有限公司
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