Method and system for dynamic water volume control in cooling zone of continuous casting machine

A technology of water quantity control and cooling zone, applied in the field of continuous casting, can solve the problems of affecting the water quantity in the cooling zone, the effect of slab cooling, and the effect of not considering the pulling speed, etc.

Active Publication Date: 2018-01-30
CISDI ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the above methods, the proportional control method based on casting speed-water volume is widely used because it takes into account the influence of the historical average casting speed on the secondary cooling water volume and avoids the rapid change of water volume when the casting speed changes sharply. The effect of different cooling zones on the pulling speed, thus affecting the water volume in the cooling zone, so that it has a greater impact on the cooling of the slab

Method used

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  • Method and system for dynamic water volume control in cooling zone of continuous casting machine
  • Method and system for dynamic water volume control in cooling zone of continuous casting machine
  • Method and system for dynamic water volume control in cooling zone of continuous casting machine

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Embodiment 1

[0112] This embodiment takes the cooling water control of the secondary cooling zone in the continuous casting process as an example. A continuous casting machine has 12 cooling zones. The implementation steps of this embodiment are the same in each cooling zone. Therefore, only cooling Zone 4 will be detailed and calculated, and the specific steps are as follows:

[0113] 1) Initialize the cooling weight coefficient Coeff of the cooling zone i i ,and n is a positive integer, 1 is the serial number of the crystallizer cooling zone, 2~n is the serial number of the secondary cooling zone, and the cooling weight coefficient of cooling zone i is shown in Table 1:

[0114] cooling zonei

1

2

3

4

5

6

7

8

9

10

11

12

Coeff i

0.1

0.09

0.11

0.14

0.12

0.09

0.06

0.09

0.07

0.06

0.03

0.04

[0115] Table 1

[0116] 2) Record the moment when slice j enters and leaves cooling zone i and and th...

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Abstract

The invention provides a dynamic water quantity control method and system for cooling areas of a continuous casting machine. The method includes the steps of determining the stay time of a slice j in the cooling areas 1-t; according to the stay time of the slice j in the cooling areas 1-t, the distance from inlets of the cooling areas 1-t to a meniscus and the distance from outlets of the cooling areas 1-t to the meniscus, determining the average speed of the slice j in the cooling areas 1-t; according to the average speed of the slice j in the cooling areas 1-t and the cooling weight coefficients of the cooling areas 1-t, determining the virtual casting speed of the slice j; according to the virtual casting speed of the slice j and the current casting speed, determining the combined casting speed of the slice j, and according to the combined casting speed of the slice j, determining the combined casting speed of the cooling area t; and according to the combined casting speed of the cooling area t, determining the water quantity of the cooling area t. According to the dynamic water quantity control method and system, the phenomenon that the fluctuation of the casting speeds of the cooling areas causes large change of the water quantity can be avoided, the influence of the large change of the water quantity of the cooling areas on cooling of casting blanks can be avoided, and the quality of the casting blanks can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of continuous casting, in particular to a dynamic water volume control method and system in a cooling zone of a continuous casting machine. Background technique [0002] Continuous casting is an important part of steel production. The schematic diagram of continuous casting process is as follows figure 1 As shown, the main process is that the high-temperature molten steel is subjected to strong cooling in the cooling zone of the crystallizer to form a billet shell with a certain thickness. Under cooling, continue to cool down until the molten steel inside is completely solidified. During the cooling process of the slab, the schematic diagram of continuous casting cooling is as follows: figure 2 As shown, about 15% of the total heat is taken away by heat conduction between the slab and the nip roll; about 25% of the total heat is taken away by the radiation heat transfer on the surface of the slab; about 4...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/22
CPCB22D11/225
Inventor 刘强韩志伟孔意文邓比涛
Owner CISDI ENG CO LTD
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