A Method for Adjusting the Production Water Volume of Continuous Casting in High Latitude Areas

An adjustment method and a high-latitude technology, applied in the field of metallurgy, can solve problems such as the inability to eliminate the influence of ambient temperature on slab defects, and achieve the effect of ensuring the same cooling efficiency of the secondary cooling, solving large environmental temperature differences, and reducing the amount of secondary cooling water

Active Publication Date: 2021-06-08
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above data shows from another aspect that the method of dividing the year into three cycles for control, if there are large defects, cannot eliminate the defects of the slab caused by the influence of the ambient temperature

Method used

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  • A Method for Adjusting the Production Water Volume of Continuous Casting in High Latitude Areas
  • A Method for Adjusting the Production Water Volume of Continuous Casting in High Latitude Areas
  • A Method for Adjusting the Production Water Volume of Continuous Casting in High Latitude Areas

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Experimental program
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Effect test

Embodiment 1

[0035] The steel type produced by the billet continuous casting machine is 82B continuous casting billet with a section of 150mm×150mm. The ambient temperature before pouring is -20°C. During the production preparation, the detection temperature of the crystallizer inlet water is 8°C, and the detection temperature of the secondary cooling water is 5°C. Because the ambient temperature and the inlet water temperature are lower than the design standard, the cooling efficiency of the crystallizer is reduced. The cooling efficiency is enhanced. According to the cooling principle, the crystallizer water needs to be raised, and the cooling coefficient of the secondary cooling water should be lowered to ensure that the temperature remains unchanged before the billet is straightened. The specific coefficient setting before pouring refers to the selection mode of the inlet water temperature. See Table 1 for details.

[0036] Table 1: Billet crystallizer water and secondary cooling water ...

Embodiment 2

[0040] The steel type produced by the slab continuous casting machine is Q235B slab with a section of 220mm×1350mm. The ambient temperature before pouring is -20°C. During the production preparation, the detection temperature of the crystallizer inlet water is 8°C, and the detection temperature of the secondary cooling water is 5°C. Because the ambient temperature and the inlet water temperature are lower than the design standard, the cooling efficiency of the crystallizer is reduced. The cooling efficiency is enhanced. According to the cooling principle, the crystallizer water needs to be raised, and the cooling coefficient of the secondary cooling water should be lowered to ensure that the temperature of the billet remains unchanged before straightening. The specific parameter settings are shown in Table 2 and Table 3 below.

[0041] Table 2: Crystallizer water control coefficient

[0042]

[0043] Table 3: Slab secondary cooling water control coefficient

[0044]

[...

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Abstract

The invention discloses a method for adjusting the water volume of continuous casting production in high-latitude regions. By detecting the water inlet temperature of the crystallizer, the water inlet temperature of the secondary cooling water and the continuous casting production environment temperature, the water volume is set according to the water temperature before the water is started; With the progress of the production process, the water temperature of the crystallizer and the secondary cooling water will gradually increase. According to the temperature gradient, the water volume of the crystallizer and the secondary cooling water will be fine-tuned to ensure that the cooling efficiency of the crystallizer remains unchanged. The temperature before the continuous casting slab enters the straightening zone It is basically stable, ensuring continuous casting production and stable billet quality. The invention stabilizes the cooling efficiency of the crystallizer under low or high temperature environment by adjusting the gradient of temperature change, interactively adjusts the secondary cooling water in combination with the ambient temperature, and controls production accidents during the season change, especially for billet entering the straightening area under low temperature environment temperature, the internal and external cracks of the slab will be greatly reduced, which has obvious significance for improving the quality of the slab.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for adjusting the production water volume of continuous casting in high-latitude regions. Background technique [0002] In the production process of steelmaking and continuous casting, the molten steel in the continuous casting machine production process continuously exchanges heat with water through the crystallizer, and a billet shell with a certain thickness is formed in the crystallizer, and the billet shell with a sufficient thickness and a liquid core is pulled out by the tension-leveling system The crystallizer is finally solidified under the continuous cooling of the secondary cooling water to make a qualified continuous casting slab. In the continuous casting engineering design specification, the cooling water inlet temperature range of the crystallizer is required to be 35°C to 45°C. In the actual production process, the temperature control range of the cont...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B22D11/22
CPCB22D11/225
Inventor魏国立朱青德胡绍岩董德平
OwnerGANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD