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Method for increasing online adjusting width of continuous casting crystallizer within large range

The invention relates to a continuous casting mold and a large-scale technology, which is applied in the field of large-scale continuous casting mold on-line thermal adjustment width reduction, which can solve the problems of reducing the output of casting blanks, waste of raw materials, and increasing production costs, so as to improve market competitiveness, The effect of reducing production cost and prolonging service life

Active Publication Date: 2013-08-14
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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  • Method for increasing online adjusting width of continuous casting crystallizer within large range
  • Method for increasing online adjusting width of continuous casting crystallizer within large range
  • Method for increasing online adjusting width of continuous casting crystallizer within large range

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The taper on one side of the mold is 4.5 mm, the taper increase is 4.5 mm during the width adjustment process, the casting speed is 1.0 m / min, the mold height is 900 mm, the meniscus height is 800 mm, the width is increased by 96 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 48 mm. The relevant parameters during the width adjustment process can be set as:

[0049] tanα=4.5 / 900, tanθ=(4.5+4.5) / 900, V c =1200 mm / min, l =800 mm, Δl= 4.5mm, W=48mm

[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 1, during the width adjustment proces...

Embodiment 2

[0060] The taper on one side of the mold is 6 mm, the taper increase is 6 mm during the width adjustment process, the casting speed is 0.8 m / min, the mold height is 900 mm, the meniscus height is 800 mm, the width is adjusted on both sides, and the width increases by 32 mm , to get the corresponding width adjustment process speed, time and wedge length relationship.

[0061] 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 16 mm. The relevant parameters during the width adjustment process can be set as:

[0062] tanα=6 / 900, tanθ=(6+6) / 900, V c =800 mm / min, l =800 mm, Δl= 6mm, W=16mm

[0063] therefore:

[0064] 1. Width adjustment speed:

[0065] (1)

[0066] 2. Widening time:

[0067] (2)

[0068] 3. Length of wedge segment:

[0069] (3)

[0070] In Example 2, during the width adjustment process, the ti...

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Abstract

The invention relates to a method for increasing the online adjusting width of a continuous casting crystallizer within a large range, and the method the following steps of: importing a crystallizer width increasing process into an online width adjusting process while the characteristic that a blank shell is solidified and contracted at high temperature is considered, wherein the process is a width increasing process; and rapidly determining control parameters comprising a width adjusting speed, width adjusting time and length of a wedge-shaped segment in the width adjusting process. Thus, a continuous casting crystallizer online width adjusting operation is guided, a large-range online hot width adjusting process is realized, and the process is the width increasing process. In the invention, the requirement for adjusting the width of the crystallizer within the large range is taken as a starting point, the characteristic that the blank shell is solidified and contracted at high temperature is taken as a basis, and the action of a casting blank and the frictional force of a copper plate are reduced, thus the method provided by the invention is simple, easy and feasible, is convenient to operate and has distinctly important significance for reducing the production cost, improving the production quality, increasing the metal yield and improving the market competitive power of products.

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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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/16B22D11/05
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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