Fixed-length control method of continuous casting blank

A control method and continuous casting billet technology, applied in the field of metallurgy, can solve the problem of narrow application range of the fixed-length control method, and achieve the effects of convenient cutting, avoiding waste, and improving the qualification rate

Active Publication Date: 2020-04-10
CONTINUOUS CASTING TECH ENG OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the purpose of the present invention is to provide a length control method for continuous casting slabs to solve the problem that the existing length control method has a narrow application range

Method used

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  • Fixed-length control method of continuous casting blank
  • Fixed-length control method of continuous casting blank
  • Fixed-length control method of continuous casting blank

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Experimental program
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Effect test

Embodiment 1

[0116] The continuous casting machine is a billet continuous casting machine with 6 machines and 6 strands. During the process of producing a cross-sectional size of 150mmX150mm, because the life of the tundish reaches the limit, it is necessary to change the tundish quickly. The operator triggers the signal of the quick change tundish. Flow drawing speed V (unit, m / min), the first distance Sd (unit, m) between the continuous casting slab head and the mold meniscus, and the virtual casting slab Pj formed according to the cutting and sizing plan (j is the virtual Billet count, j=1,2,...,m), target cut-to-length length L (unit, m), billet length or tail billet length ΔL (unit, m) in the connection area to be cut off, tundish steel Water weight W1 (unit, kg), weight of molten steel to be retained in the tundish W2 (unit, kg), cross-sectional area of ​​continuous casting slab S0 (unit, m 2 ) and slab density ρ (unit: kg / m 3 ) are shown in Table 1 below:

[0117] Table 1

[0118...

Embodiment 2

[0145] The continuous casting machine is a 12-machine 12-strand billet continuous casting machine. During the actual process of producing a cross-sectional size of 165mmX165mm, the running speed of the billet is 3.0m / min. Due to the severe nodulation of the 5th submerged nozzle, which affects the flow of molten steel from the tundish into the mold, it is necessary to replace the submerged nozzle, and the operator triggers the signal of the 5th submerged nozzle for quick change. At this time, the first distance Sd=39.4m between the head of the continuous casting slab and the meniscus of the mold is 39.4m, and the virtual slab formed according to the cutting and sizing plan is P1=12m, P2=12m, P3=10m, and the target The ruler length L=10m, the slab length ΔL=1.5m in the connecting area to be cut off, and the allowable length error ΔS0=0.15m. Then the second distance between the tail of the last virtual slab and the meniscus of the mold is S=39.4-12-12-10=5.4m, and the complementa...

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Abstract

The invention discloses a fixed-length control method of a continuous casting blank. The method comprises the steps of obtaining a first distance between a continuous casting blank head and a crystallizer meniscus surface; according to a cutting fixed-length plan, determining a target fixed-length length, and dividing the continuous casting blank into multiple virtual casting blanks; according tothe length of the virtual casting blanks and the first distance, obtaining a second distance between one virtual casting blank tail closest to the crystallizer meniscus surface and the crystallizer meniscus surface; according to the tart fixed-length length, the planned-cutting casting blank length and the second distance, obtaining a complementing length needed for obtaining the target fixed-length length; and according to the complementing length and a received operation signal, controlling to carry out at the operation opportunity corresponding to the operation signal. The non-fixed-lengthcasting blank or waste blank caused by the casting blank quality during corresponding operation can be avoided, waste is avoided, and the casting blank yield can be improved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a length-sizing control method for continuous casting slabs. Background technique [0002] In the continuous casting process of iron and steel production process, liquid steel is injected into the tundish from the ladle, and then flows into the crystallizer from the tundish along the submerged nozzle for cooling, and forms a shell of a certain shape, and then undergoes secondary cooling and natural cooling to complete Solidified into a billet, in order to meet the billet sizing requirements required for steel rolling, it is necessary to cut the billet according to a certain length by a cutting machine. In the actual production process, the pouring of molten steel is continuous, but since the tundish and submerged nozzle have a certain life span, in order to ensure the continuity of continuous casting production, it is necessary to perform quick change of the tundish and submer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/18
CPCB22D11/18
Inventor 韩占光鄢松涛张冶江钱亮
Owner CONTINUOUS CASTING TECH ENG OF CHINA
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