Control method for solving blank stagnation of Dalnell slab continuous casting machine

The technology of a slab continuous casting machine and a control method is applied in the field of Danieli slab continuous casting machine sluggish control, and can solve problems such as poor working conditions, reduced casting slab quality, and hidden dangers in production safety, so as to reduce Cracks on the surface of the billet, the effect of improving the surface quality and ensuring the stability

Inactive Publication Date: 2022-01-04
HANDAN IRON & STEEL GROUP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Since the Danieli slab continuous casting machine was put into operation in 2008, it has been in operation for 12 years. Due to the long running time of the continuous casting machine, the high operating rate of the casting machine, the complex structure of the equipment, the poor working conditions, and the poor operation of the sector Ideal, resulting in the recent production of a series of high-strength steels such as carbon, peritectic, and pipeline steel, the phenomenon of frequent caster stagnation seriously affects the steady-state and efficient production of continuous casting machines, resulting in a large number of rejoined billets, which reduces the casting cost. billet quality, resulting in a huge loss of production efficiency and safety hazards

Method used

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  • Control method for solving blank stagnation of Dalnell slab continuous casting machine
  • Control method for solving blank stagnation of Dalnell slab continuous casting machine
  • Control method for solving blank stagnation of Dalnell slab continuous casting machine

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Effect test

Embodiment 1

[0036] Embodiment 1: Production of No. 7 (MC-HSLA) steel grade 1800-2000mm, casting speed 0.95-1.15m / min, in order to ensure the accuracy of the cooling surface temperature of the slab after the adjustment of the secondary cooling water coefficient. Implementation plan: ① Check the mold of the casting machine to the 8th section one by one before production. There is no obvious water leakage in each equipment, and the spraying state can play a uniform cooling effect on the billet; ② Strictly control the production rhythm to ensure constant casting speed ; ④ The whole process control ensures that the superheat of the continuous casting tundish is between 15 and 25 ℃. The temperature of the cooling surface of the slab was increased, the straightening yield strength of the slab was effectively reduced, and the walking resistance of the slab was reduced. There was no stagnation of the slab in the two pouring times.

[0037]

Embodiment 2

[0038] Example 2: Production of No. 11 (PIPE) steel grade 1200-1550mm, casting speed 1.25-1.45m / min, in order to ensure the accuracy of the cooling surface temperature of the slab after the adjustment of the secondary cooling water coefficient. Implementation plan: ① Check the mold of the casting machine to the 8th section one by one before production. There is no obvious water leakage in each equipment, and the spraying state can play a uniform cooling effect on the billet; ② Strictly control the production rhythm to ensure constant casting speed ; ④ The whole process control ensures that the superheat of the continuous casting tundish is between 15 and 25 ℃. The temperature of the cooling surface of the slab was increased, the straightening yield strength of the slab was effectively reduced, and the walking resistance of the slab was reduced. There was no stagnation of the slab in the three pouring times.

[0039]

Embodiment 3

[0040] Embodiment 3: No. 6 (PER-HSLA) steel grade was produced, and the casting speed was 1.1-1.25m / min, in order to ensure the accuracy of the cooling surface temperature of the slab after the adjustment of the secondary cooling water coefficient. Implementation plan: ① Check the mold of the casting machine to the 8th section one by one before production. There is no obvious water leakage in each equipment, and the spraying state can play a uniform cooling effect on the billet; ② Strictly control the production rhythm to ensure constant casting speed ; ④ The whole process control ensures that the superheat of the continuous casting tundish is between 15 and 25 ℃. The temperature of the cooling surface of the slab was increased, the straightening yield strength of the slab was effectively reduced, and the walking resistance of the slab was reduced. There was no stagnation of the slab in the three pouring times.

[0041]

[0042] The invention fully exerts the performance of...

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Abstract

The invention relates to a control method for solving blank stagnation of a Dalnell slab continuous casting machine, and belongs to the technical field of steelmaking continuous casting methods. According to the technical scheme, blank stagnation is effectively solved by improving the problem of continuous casting combination of different steel grades and cooling of fan-shaped sections. The casting machine has the beneficial effect that the stability of the casting machine during production of high-strength steel is guaranteed. The problem of frequent blank stagnation of carbon, peritectic and pipeline steel in continuous casting machine production is solved; and meanwhile, the surface quality of a casting blank is improved, surface cracks of the casting blank are reduced, the head buckling phenomenon after the casting blank goes out of the horizontal section is eliminated, and very obvious effects are achieved in the aspects of smooth production and improvement of the quality of the casting blank.

Description

technical field [0001] The invention relates to a control method for solving the stagnation of a Danieli slab continuous casting machine, and belongs to the technical field of steelmaking and continuous casting methods. Background technique [0002] Since the Danieli slab continuous casting machine was put into operation in 2008, it has been in operation for 12 years. Due to the long running time of the continuous casting machine, the high operating rate of the casting machine, the complex structure of the equipment, the poor working conditions, and the poor operation of the sector Ideal, resulting in the recent production of a series of high-strength steels such as carbon, peritectic, and pipeline steel, the phenomenon of frequent caster stagnation seriously affects the steady-state and efficient production of continuous casting machines, resulting in a large number of rejoined billets, which reduces the casting cost. Billet quality, resulting in huge loss of production ben...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/16B22D11/22B22D11/12B22D11/124
CPCB22D11/16B22D11/22B22D11/124B22D11/1206
Inventor 刘国庆唐辉建赵艳玲柳风林王声齐孙静波任世远
Owner HANDAN IRON & STEEL GROUP
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