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Method for reducing online adjusting width of continuous casting crystallizer within small range

A continuous casting crystallizer width reduction technology, applied in the field of small-scale continuous casting crystallizer online thermal adjustment width reduction, can solve the problems of waste of raw materials, reduce billet output, disrupt the production rhythm of steel mills, etc., and achieve reduction Effect of production cost, improvement of market competitiveness and improvement of production quality

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

In the case of continuous casting machine shutdown and secondary casting, on the one hand, it disrupts the production rhythm of the steel plant and reduces the output of casting slabs; on the other hand, it also causes waste of raw materials and increases 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 reducing online adjusting width of continuous casting crystallizer within small range
  • Method for reducing online adjusting width of continuous casting crystallizer within small range
  • Method for reducing online adjusting width of continuous casting crystallizer within small range

Examples

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Comparison scheme
Effect test

Embodiment 1

[0058] The taper on one side of the mold is 9 mm, the taper increase is 9 mm during the width adjustment process, 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 16 mm when both sides are widened , to get the corresponding width adjustment process speed, time and wedge length relationship.

[0059] 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 reduced by 8 mm. The relevant parameters in the process of width adjustment can be set as:

[0060] tanα=9 / 900, tanθ=(9-9) / 900, V c =1200 mm / min, l =800 mm, Δl= 9 mm, W =8 mm

[0061] therefore:

[0062] 1. Width adjustment speed:

[0063] (1)

[0064] 2. Widening time:

[0065] (2)

[0066] 3. Length of wedge segment:

[0067] (3)

[0068] In this embodiment 1, during the width adjustment...

Embodiment 2

[0072] 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 0.9 m / min, the mold height is 900 mm, the meniscus height is 800 mm, the width is increased by 8 mm when both sides are widened , to get the corresponding width adjustment process speed, time and wedge length relationship.

[0073] 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 4 mm. The relevant parameters in the process of width adjustment can be set as:

[0074] tanα=6 / 900, tanθ=(6-6) / 900, V c =900 mm / min, l =800 mm, Δl= 6 mm, W =4 mm

[0075] therefore:

[0076] 1. Width adjustment speed:

[0077] (1)

[0078] 2. Widening time:

[0079] (2)

[0080] 3. Length of wedge segment:

[0081] (3)

[0082] In Example 2, during the width adjustment process, the time displacemen...

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Abstract

The invention relates to a method for reducing the online adjusting width of a continuous casting crystallizer within a small range, and the method the following steps of: importing a crystallizer width reducing 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 reducing 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 small-range online hot width adjusting process is realized, and the process is the width reducing process. In the invention, therequirement for adjusting the width of the crystallizer within the small 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 continuous casting crystallizers, in particular to the process of reducing the width of online thermal adjustment of small-scale continuous casting crystallizers. Background technique [0002] As the heart of the continuous casting machine, the continuous casting mold plays an extremely important role in the continuous casting production. With the continuous development of continuous casting technology, the ever-changing continuous production requirements put forward more stringent requirements on the continuous casting machine itself, and the mold often needs to adjust the width to obtain slabs of different sizes. Even when adjusting the width of the mold in a small range, 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 co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/05B22D11/18
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