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Method for changing conical degree at moment of obstructing process of on-line width reduction of continuous casting crystallizer

A continuous casting mold and width reduction technology, which is applied in the field of continuous casting mold online taper change, can solve problems such as unfavorable equipment use and safety production impact, and achieve the effects of convenient operation, lower production costs, and improved market competitiveness.

Active Publication Date: 2013-06-19
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

[0003] Due to the difference in the speed of the upper and lower ports of the crystallizer, the traditional online width adjustment technology causes a sudden increase and decrease in the width adjustment speed due to the instantaneous pressure change of the hydraulic cylinder during the width adjustment process, which is not good for the use of equipment; There are adverse effects on the drawing process of the shell and the continuous normal heat transfer process, which may easily affect the safety of production

Method used

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  • Method for changing conical degree at moment of obstructing process of on-line width reduction of continuous casting crystallizer
  • Method for changing conical degree at moment of obstructing process of on-line width reduction of continuous casting crystallizer
  • Method for changing conical degree at moment of obstructing process of on-line width reduction of continuous casting crystallizer

Examples

Experimental program
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Effect test

Embodiment 1

[0049] 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 1.0 m / min, the mold height is 900 mm, and the meniscus height is 800 mm. When the width adjustment process is caused by taper adjustment The upper cylinder is faulty, and the taper has been adjusted by 2 mm at this time, and the corresponding relationship between acceleration and taper change time during the taper change process is obtained.

[0050] From the above analysis, it can be seen that the fault in the width adjustment process occurs in the taper adjustment process. The relevant parameters in the process of width adjustment can be set as:

[0051] tanα=6 / 900, tanθ=(6-6) / 900, V c =1000 mm / min, l =800 mm, ΔL / = 2 mm

[0052] therefore:

[0053] 1. Taper change acceleration:

[0054] (1)

[0055] 2. Taper change process time:

[0056] (2)

[0057] In the process of changing the taper i...

Embodiment 2

[0061] The taper on one side of the mold is 9 mm, the taper change during the width adjustment process is 7.2 mm, the casting speed is 1.2 m / min, the mold height is 900 mm, and the meniscus height is 800 mm. The failure of the upper cylinder is caused, and the corresponding relationship between acceleration and taper change time during the taper change process is obtained.

[0062] From the above analysis, it can be seen that the fault in the width adjustment process occurs in the width adjustment translation process. The relevant parameters in the process of width adjustment can be set as:

[0063] tanα=9 / 900, tanθ=(9-7.2) / 900, V c =1200 mm / min, l =800 mm, ΔL / = 7.2 mm

[0064] therefore:

[0065] 1. Taper change acceleration:

[0066] (3)

[0067] 2. Taper change process time:

[0068] (4)

[0069] In the process of changing the taper in Example 2, the time displacement relationship corresponding to the upper mouth...

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Abstract

The invention relates to a method for changing a conical degree at the moment of obstructing a process of on-line width reduction of a continuous casting crystallizer. The method comprises the following steps: taking solidifying contraction of a blank shell as a starting point, and then introducing a process obstructing condition in the process of reducing the width of the continuous casting crystallizer into the process of on-line width reduction at real time, so as to confirm a control parameter which contains an accelerated speed and a resetting time for adjusting a conical degree in the conical degree changing process of a casting machine, thereby reliably ensuring the safety continuous production of the casting machine. The method provided by the invention has significance on lowering the production cost, promoting the production quality, promoting the metal yield and promoting the market competitiveness of products.

Description

technical field [0001] The invention relates to the technical field of on-line taper change of a continuous casting mold, in particular to a taper change process when the on-line thermal adjustment width increase process of the continuous casting mold is blocked. Background technique [0002] The continuous casting mold is the heart of continuous casting, which can directly affect the quality of the slab and the adaptability of steel grades. In order to adapt to the frequently changing requirements of continuous casting and rolling production, the mold width often needs to be adjusted to obtain slabs of different sizes. In addition, in order to improve the operation rate of the continuous casting machine, it is also necessary to obtain continuous and uninterrupted production of the continuous casting machine. To this end, people have developed a continuous online mold width adjustment technology that meets the needs of continuous production of cast slabs in various procedur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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