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Process for safely and quickly ending continuous casting sheet billet

A slab and safety technology, which is applied in the field of continuous casting slab safe and fast finishing technology, can solve the problems of affecting the working efficiency of the continuous casting machine, increasing the production cost, and affecting the production safety, etc., so as to reduce the intensity of the secondary cooling water, The effect of slowing down the shrinkage speed and reducing the extrusion stress

Active Publication Date: 2021-09-10
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional continuous casting finishing billet process is prone to steel leakage when the billet is being closed, resulting in damage to the bending section of the continuous casting machine. The replacement process takes a long time, increases production costs, and seriously affects the working efficiency of the continuous casting machine. Fast-paced, high-capacity production rhythm
On the other hand, the traditional billet finishing process needs to cap the tail billet with water, and if the water enters the steel slag and vaporizes rapidly, it may explode, seriously affecting production safety

Method used

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  • Process for safely and quickly ending continuous casting sheet billet

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Effect test

Embodiment 1

[0023] This embodiment provides a continuous casting slab safe and fast finishing process. The section of the continuous casting machine casting slab is 180*2500mm, and the normal casting speed is 1.2m / min, including the following steps:

[0024] S1. When the remaining tundish is 20t, gradually reduce the working speed of the continuous casting machine;

[0025] S2. Reduce the working casting speed of the continuous casting machine to 0.6m / min 1 minute before the end of the tundish pouring;

[0026] S3. After the casting of the tundish is finished, reduce the working casting speed of the continuous casting machine to 0.3m / min to start finishing the billet, and continue until the tail billet exits the mold;

[0027] S4, increase the casting speed of the continuous casting machine to 0.6m / min for 1min;

[0028] S5, increase the casting speed of the continuous casting machine to 0.85m / min for 1min;

[0029] S6. Increase the casting speed of the continuous casting machine to 1.8...

Embodiment 2

[0031] This embodiment provides a continuous casting slab safe and fast finishing process. The section of the continuous casting machine casting slab is 260*2570mm, and the normal casting speed is 0.85m / min, including the following steps:

[0032] S1. When the remaining tundish is 20t, gradually reduce the working speed of the continuous casting machine;

[0033] S2. Reduce the working casting speed of the continuous casting machine to 0.45m / min 1 minute before the end of the tundish pouring;

[0034] S3. After the tundish pouring is completed, reduce the casting speed of the continuous casting machine to 0.2m / min to start finishing the billet, and continue until the tail billet exits the mold;

[0035] S4, increase the casting speed of the continuous casting machine to 0.45m / min for 1min;

[0036] S5, increase the casting speed of the continuous casting machine to 0.6m / min for 1min;

[0037] S6. Increase the casting speed of the continuous casting machine to 1.25m / min accor...

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Abstract

The invention discloses a process for safely and quickly ending a continuous casting sheet billet and relates to the technical field of steel production. The process comprises the following steps: S1, starting to gradually reduce the working pulling speed of a continuous casting machine when 20t of tundish remains; S2, before tundish pouring is finished, the working pulling speed of the continuous casting machine is reduced to 0.5 times of the normal working pulling speed; S3, after pouring of the tundish is finished, the working pulling speed of the continuous casting machine is reduced to 0.2-0.3 m / min according to the situation of the section of the sheet billet, and ending of the tail billet is started till the tail billet is discharged out of a crystallizer; S4, the pulling speed of the continuous casting machine is increased to 0.5 time of the normal working pulling speed for 1 min; S5, the pulling speed of the continuous casting machine is increased to 0.7 time of the normal working pulling speed for 1 min; and S6, the pulling speed of the continuous casting machine is increased to be larger than the normal working pulling speed till the tail billet comes out of a fan-shaped section, and the running out process is ended. The method effectively controls the tail billet steel overflowing when the continuous casting sheet billet is finished, shortens the running out process ending time, improves the productivity of the continuous casting machine, and reduces the safety risk of the running out process.

Description

technical field [0001] The invention relates to the technical field of iron and steel production, in particular to a process for safely and quickly finishing a continuous casting slab. Background technique [0002] With the rapid development of my country's iron and steel technology, the production capacity and work efficiency of continuous casting machines are constantly improving. Safe and efficient production has become an important development trend and pursuit goal of continuous casting. The traditional continuous casting finishing billet process is prone to steel leakage when the billet is being closed, resulting in damage to the bending section of the continuous casting machine. The replacement process takes a long time, increases production costs, and seriously affects the working efficiency of the continuous casting machine. Fast-paced, high-capacity production rhythm. On the other hand, the traditional billet finishing process needs to cap the billet with water, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/20B22D11/22B22D11/124B22D11/128
CPCB22D11/20B22D11/225B22D11/128B22D11/124
Inventor 郭蕊
Owner NANJING IRON & STEEL CO LTD
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