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A secondary cooling spray equipment for high-speed production of billet continuous casting machine

A technology of billet continuous casting and spraying equipment, which is applied in the field of metallurgy, can solve problems such as internal cracks and square removal, and achieve the effects of reducing investment costs, stabilizing high-speed production, and increasing annual production capacity

Active Publication Date: 2019-04-30
CONTINUOUS CASTING TECH ENG OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the background technology, the present invention provides a secondary cooling spraying equipment for high casting speed production of billet continuous casting machine, which can improve the uniform cooling of casting slab by ensuring the uniformity of secondary cooling spray water, thereby solving the problem of small billet continuous casting machine. Problems such as square billet falling off and internal cracks after high drawing speed of billet variety steel

Method used

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  • A secondary cooling spray equipment for high-speed production of billet continuous casting machine
  • A secondary cooling spray equipment for high-speed production of billet continuous casting machine
  • A secondary cooling spray equipment for high-speed production of billet continuous casting machine

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Embodiment 1

[0038] In addition to the foot roller, 6 spray racks are used, of which 2 spray racks are a cooling zone, controlled by a water valve, and each spray rack has a spray pipe on the left, right, and inside, with a length of 1.6m. The spray pipe is provided with 4 rectangular aerosol nozzles, each of which has a spray angle of 90° in the wide direction and a spray angle of 35° in the narrow direction, and a water pressure of 1.2MPa. Two adjacent aerosol nozzles The distance between them is 460mm, the height of the first two spray rack air mist nozzles from the surface of the slab is 250mm, the height of the middle two is 240mm, and the height of the last two is 220mm. Achieved a casting speed of 3.0m / min for billet 72A steel with a cross-section of 150*150mm, 3.0-3.5m / min for medium-high carbon steel, and 4.0m / min for ordinary carbon steel, and the production of billets without intermediate cracks .

Embodiment 2

[0040] In addition to the foot roller, 6 spray racks are used, of which 2 spray racks are a cooling zone, which is controlled by a water valve and named as zone 2, zone 3, and zone 4 respectively; A spray pipe with a length of 1.7m. Four rectangular aerosol nozzles are arranged on the upper and lower (i.e. inner and outer arc) spray pipes. The angle is 35°, the water pressure is 1.2MPa, and the distance between two adjacent aerosol nozzles is 460mm. The left and right spray pipes are provided with 5 rectangular aerosol nozzles, each of which has a spray angle of 90° in the wide direction, a spray angle of 35° in the narrow direction, and a water pressure of 1.2MPa. The distance between the mist nozzles is 380mm, the height of the first air mist nozzle at the top from the surface of the continuous casting slab is 260mm, and the height of the air mist nozzles along the casting direction from the surface of the continuous casting slab is gradually shortened by 4mm. The billet GC...

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Abstract

The invention provides a secondary cooling spraying equipment used for high-speed production of billet continuous casting machine, comprising a multi-section spraying frame, the spraying frame includes a plurality of spraying pipes; At the end of the equipment opposite to the casting direction, the spray pipe is provided with a large gas mist nozzle, and the front and rear edges of the adjacent spray spots formed by the large gas mist nozzle on the continuous casting slab all overlap each other, and the adjacent two The water sprayed on the surface of the continuous casting slab by the large air mist nozzle is arranged continuously; the height of the large air mist nozzle from the continuous casting slab gradually decreases along the direction of casting, so that the front and rear edges of adjacent spray spots along the direction of casting From fully overlapping to partially overlapping each other, while ensuring that the coverage area of ​​the spray spot in the width direction of the slab perpendicular to the casting direction is gradually reduced. The invention improves the uniform cooling of the billet by ensuring the uniformity of the secondary cooling water spray, thereby solving the problems of billet variety steel falling off the square and internal cracks after high drawing speed.

Description

technical field [0001] The invention relates to a secondary cooling device for a continuous casting machine, in particular to a secondary cooling spraying device for high-speed production of a billet continuous casting machine, and belongs to the technical field of metallurgy. Background technique [0002] The benefits of high billet casting speed are obvious. Under the same annual production capacity and furnace machine matching requirements, the flow number of casting machines can be reduced, thereby completely reducing investment costs, production costs and maintenance costs. Now the casting speed of ordinary carbon steel (such as ordinary structural steel, screw thread, etc.) can reach very high, for example, the casting speed of 150*150mm billet can reach 4.0m / min. However, the steel types produced by each continuous casting machine cannot be single, and even more types of steel are required to be produced, and the casting speed of the variety steel is difficult to incr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/124
CPCB22D11/124B22D11/1246
Inventor 钱亮陶金明
Owner CONTINUOUS CASTING TECH ENG OF CHINA
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