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Online width-increasing adjustment method for continuous casting crystallizer in small range

A continuous casting mold and small-scale technology, which is applied to the field of increasing the online thermal adjustment width of the small-scale continuous casting mold, can solve the problems of disrupting the production rhythm of the steel mill, increasing the production cost, reducing the output of the slab, and improving the production. The effect of quality, friction reduction, and ease of operation

Active Publication Date: 2013-09-18
WISDRI ENG & RES INC LTD
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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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  • Online width-increasing adjustment method for continuous casting crystallizer in small range
  • Online width-increasing adjustment method for continuous casting crystallizer in small range
  • Online width-increasing adjustment method for continuous casting crystallizer in small range

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 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 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 8 mm. The relevant parameters in the process of width adjustment can be set as:

[0060] tanα=4.5 / 900, tanθ=(4.5+4.5) / 900, V c =1000 mm / min, l =800 mm, Δl= 4.5 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 adjustm...

Embodiment 2

[0071] The taper on one side of the mold is 7.8 mm, the taper increase is 7.8 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, and the width is increased by 12 mm when both sides are widened , to get the corresponding width adjustment process speed, time and wedge length relationship.

[0072] 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 6 mm. The relevant parameters in the process of width adjustment can be set as:

[0073] tanα=7.8 / 900, tanθ=(7.8+7.8) / 900, V c =900 mm / min, l =800 mm, Δl= 7.8 mm, W =6 mm

[0074] therefore:

[0075] 1. Width adjustment speed:

[0076] (3)

[0077] 2. Widening time:

[0078] (4)

[0079] 3. Length of wedge segment:

[0080] (3)

[0081] In Example 2, during the width adjustment process, the...

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Abstract

The invention discloses an online width-increasing adjustment method for a continuous casting crystallizer in a small range, specifically comprising the following steps of: by considering solidification contractile properties of a high-temperature billet shell, leading the width-increasing process of the crystallizer in an online width adjustment process, which is a width-increasing process; and rapidly determining control parameters in the width-increasing process, wherein the control parameters comprise width adjustment speed, width adjustment time and the length of a wedge-shaped section; therefore, the online width adjustment operation of the crystallizer is guided; the small-range online thermal width adjustment process is realized; and the process is the width-increasing process. Byconsidering the solidification contractile properties of a casting stock and reducing friction force of a copper plate by the casting stock, the method disclosed by the invention is not only simple, feasible and convenient in operation but also has a very important significance for reducing the production cost, improving the production quality, increasing the metal yield and improving the productmarket competitiveness.

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 increasing the online thermal adjustment width 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 con...

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 WISDRI ENG & RES INC LTD
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