Method for adjusting continuous casting production water yield in high-latitude area

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 billet defects

Active Publication Date: 2020-02-18
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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  • Method for adjusting continuous casting production water yield in high-latitude area
  • Method for adjusting continuous casting production water yield in high-latitude area
  • Method for adjusting continuous casting production water yield in high-latitude area

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Experimental program
Comparison scheme
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 continuous casting production water yield in a high-latitude area. The water inlet temperature of a crystallizer, the water inlet temperature of secondary cooling water and the environment temperature of continuous casting production are detected, and the cast-on water yield is set according to the water inlet temperature before cast-on; and alongwith the production process, the water inlet temperature of the crystallizer and the water inlet temperature of the secondary cooling water are gradually increased, the water yields of the crystallizer and the secondary cooling water are finely adjusted according to the temperature change gradient, it is guaranteed that the cooling efficiency of the crystallizer is unchanged, the temperature of acontinuous casting billet is basically stable before the continuous casting billet enters a straightening region, and it is guaranteed that continuous casting production is smooth and the quality ofa casting blank is stable. The temperature change gradient is adjusted, the cooling efficiency of the crystallizer in the low-temperature or high-temperature environment is stabilized, in combinationwith the environment temperature, the secondary cooling water is interactively adjusted, production accidents are controlled in mid-seasons, especially, the temperature of the casting blank entering the straightening region in the low-temperature environment is stable, cracks inside and outside the casting blank are greatly reduced, and obvious significance is achieved for improving the quality ofthe casting blank.

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 & AuthorityApplications(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