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Method and device for heat preservation of billet corner during continuous casting

A casting billet and continuous casting technology, applied in the field of corner insulation of billet, can solve the problems of economic loss, unsatisfactory effect, corner cracks, etc., and achieve the effects of slowing down heat dissipation, low cost and reducing temperature difference

Active Publication Date: 2019-02-26
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the metal continuous casting process, since the heat dissipation area per unit volume of the billet corner is much larger than other parts, its temperature is lower than other parts, resulting in corner cracks and other defects often occurring when the billet is bent and straightened. , the casting slab needs to be cleaned up or scrapped offline, which will undoubtedly cause great economic losses
For this reason, technicians tried to overcome the corner defects of the slab by adjusting the casting speed and cooling intensity, but the results were not satisfactory

Method used

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  • Method and device for heat preservation of billet corner during continuous casting
  • Method and device for heat preservation of billet corner during continuous casting
  • Method and device for heat preservation of billet corner during continuous casting

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Continuous casting produces plain carbon steel slabs with specifications of 1350×230mm, and the process of corner insulation of the slabs is as follows:

[0042] Before continuous casting starts, adjust the distance between the rims of each pair of sticking wheels 2 and the distance between the edges of each pair of cleaning roller brushes 11 according to the width of the slab (1350mm), so that the distance between the outer edges is 1351-1355mm;

[0043] After the continuous casting starts, when the head of the slab 12 moves to the position of the pasting wheel 2, it touches the insulation belt 1, and the adhesive layer on the insulation belt 1 becomes viscous under the action of high temperature, and then sticks to the side of the slab 12. Connect together and move together with the casting slab 12, and at the same time drive the insulation belt roll 10 to rotate, so that the insulation belt 1 is evenly pasted to the upper and lower edges of the casting slab 12 through...

Embodiment 2

[0047]The alloy steel billet with a rolling specification of 380×280mm is rolled, and the corner insulation process of the billet is as follows:

[0048] Before continuous casting starts, adjust the distance between the rims of each pair of sticking wheels 2 and the distance between the edges of each pair of cleaning roller brushes 11 according to the width (380mm) of the billet 12, so that the distance between the outer edges is 389-392mm ;

[0049] After the continuous casting starts, when the head of the slab 12 moves to the position of the pasting wheel 2, it touches the insulation belt 1, and the adhesive layer on the insulation belt 1 becomes viscous under the action of high temperature, and then sticks to the side of the slab 12. Connect together, move together with the casting slab 12, and drive the insulation belt roll 10 to rotate at the same time, so that the insulation belt 1 is evenly pasted to the upper and lower edges of the casting slab 12 through the rotation ...

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Abstract

The invention relates to a method and a device for the corner thermal insulation of a casting blank in a continuous casting process. Thermal insulating belt gluing mechanisms are mounted at the two sides of a continuous casting machine frame at the first section of a continuous casting secondary cooling zone, and thermal insulating belt clearing mechanisms are mounted at the two sides of the continuous casting machine frame between a continuous casting straightening zone and a casting blank cutting station. During continuous casting blank drawing, when the casting blank is fed to positions at which the thermal insulating belt gluing mechanisms are located, and thermal insulating belts are automatically glued to the upper and lower ends of the two sides of the casting blank; and when the casting blank is fed to positions at which the thermal insulating belt clearing mechanisms are located, the glued thermal insulating belts are cleared clean by clearing rollers. The thermal insulating belt gluing mechanisms consist of support regulating brackets, gluing wheels and thermal insulating belt rolls. The thermal insulating belt clearing mechanisms consist of support regulating brackets, clearing roller brushes and motors. By gluing the thermal insulating belts, the corner heat radiation of the casting blank is reduced, temperature differences between the corners and other parts of the casting blank are reduced, and the deflective rate of the casting blank corners is obviously reduced. The method and the device are particularly suitable for producing steels with corner crack sensitivity. The used device is simple in structure, easy to manufacture, low in cost and convenient to use.

Description

technical field [0001] The invention relates to the technical field of continuous casting, in particular to a method and a device for heat preservation at the corner of a slab during continuous casting. Background technique [0002] In the metal continuous casting process, since the heat dissipation area per unit volume of the billet corner is much larger than other parts, its temperature is lower than other parts, resulting in corner cracks and other defects often occurring when the billet is bent and straightened. , the billet needs to be cleaned up or scrapped offline, which will undoubtedly cause great economic losses. For this reason, technicians try to overcome the corner defects of the slab by adjusting the casting speed and cooling intensity, but the results are not satisfactory. Contents of the invention [0003] The invention provides a method and device for heat preservation at the corner of the slab in the continuous casting process. The heat dissipation at th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/12
CPCB22D11/1213
Inventor 黄玉平常桂华唐雪峰赵成林郭庆涛李德军彭春霖康伟李冰
Owner ANGANG STEEL CO LTD