Method for processing blank stop of slab casting machine

A technology of slab continuous casting machine and slab stagnation, which is applied in the field of iron and steel metallurgy, can solve the problems of enterprise loss, high labor intensity, long time, etc., and achieve the effect of reducing replacement, reducing damage and increasing speed

Active Publication Date: 2013-12-18
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when the condition of the casting machine equipment is not good and the tensile force of the sector is insufficient, it is more likely to happen. It takes a long time to deal with such accidents, the labor intensity is high, and the equipment is damaged. Usually, it is often necessary to completely cut off the billet and replace the sector. , causing great losses to the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Due to the failure of the torch cutter, the casting machine took up to 13 minutes for billet casting at an abnormally low speed of 0.3m / min, resulting in a billet stagnation accident. After the billet stagnation accident occurred, the operator in the central control room operated the roll gap adjustment device to quickly enlarge the roll gap of the fan section by 10mm. Then continue to drive the drive roller of the sector section at a speed of 0.8m / min, and the casting slab is pulled out of the arc section smoothly.

Embodiment 2

[0014] Due to the breakage of the nozzle of the casting machine, the replacement of the nozzle failed, and the time for the casting speed to return to zero reached 12 minutes, and the billet stagnation accident occurred. After the billet stagnation accident occurred, the operator in the central control room operated the roll gap adjustment device to quickly enlarge the sector segment roll gap by 10mm, and then continued to drive the sector segment drive rollers, but the billet still did not move. The operator holds the oxygen tube and stands on the segment of the second cold room, uses a burning paper tube to ignite the oxygen tube for blowing oxygen, and then inserts the oxygen tube into the connecting gap of each adjacent segment before and after the arc segment, and the cast slab Cut a deep groove horizontally, keep the depth incompletely cut, and keep the residual connection thickness of the slab at 20-45mm. After completing the cutting of the slab in the arc sector above t...

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PUM

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Abstract

The invention discloses a method for processing blank stop of a slab casting machine. The method is characterized in that when blank stop is caused, a fan-shaped section roll gap is widened by 5 to 20mm to reduce blank-pulling resistance, and then a fan-shaped section driving roll is operated to pull casting blanks from two cold rooms at the speed of 0.1 to 1.0m/min; if the casting blanks are still not moved, a part casting blank cutting method is performed to reduce the resistance to bending and straightening of the casting machine, wherein a burning oxygen-blowing steel pipe cutting method is adopted in the part casting blank cutting method, a steel pipe is made from Q235B and is 12mm in wall thickness, 5 to 12mm in inner diameter and 1 to 5mm in length, the tail end of the steel pipe is connected with an oxygen pipe, the purity of oxygen is more than 99 percent, the cut casting blanks are not completely cut, and the residual connecting thickness of the casting blanks is 10 to 60mm. Compared with the prior art, the method has the advantages that the speed of processing blank stop of the slab casting machine can be effectively increased, the damage to equipment by accidents is reduced, and the replacing frequency of a fan-shaped section is reduced.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for processing stagnant slabs of slab continuous casting machines. Background technique [0002] When the casting machine has abnormally low casting speed for a long time during the production process or the casting pauses and the casting speed returns to zero for a long time, it often causes the billet to be clamped in the sector and cannot be pulled out of the casting machine. Manufacturers usually call this phenomenon as Stuck billet or clamped billet. Especially when the condition of the casting machine equipment is not good and the tensile force of the sector is insufficient, it is more likely to happen. It takes a long time to deal with such an accident, the labor intensity is high, and the equipment is damaged. Usually, it is often necessary to completely cut off the casting billet and replace the sector. , has brought great losses to the enterp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/20
Inventor 费鹏林洋张钟铮姜振生孙群张越吴春杰孙涛
Owner ANGANG STEEL CO LTD
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