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Sliding Nozzle for Continuous Casting and Its Method of Reducing Drift Flow of Submerged Nozzle

A sliding nozzle and continuous casting technology, used in foundry equipment, casting melt containers, metal processing equipment, etc., can solve problems such as molten steel drift and continuous casting problems, and achieve the effect of simple transformation and simple production.

Active Publication Date: 2017-12-22
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Modern sliding nozzles for continuous casting in iron and steel plants are basically the so-called "three-layer" structure of upper nozzle bricks, slide plates and lower nozzle bricks. During the sliding flow control process, the opening degree is variable. The liquid will produce a bias flow, which will lead to various continuous casting problems

Method used

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  • Sliding Nozzle for Continuous Casting and Its Method of Reducing Drift Flow of Submerged Nozzle
  • Sliding Nozzle for Continuous Casting and Its Method of Reducing Drift Flow of Submerged Nozzle
  • Sliding Nozzle for Continuous Casting and Its Method of Reducing Drift Flow of Submerged Nozzle

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Embodiment 1

[0034] A sliding nozzle with double sliding plates, see figure 1 This sliding nozzle includes a linkage mechanism, upper and lower nozzles 2, 7, upper and lower slide plates 4, 5, upper and lower nozzle block 3, 6, and upper nozzle 2 and upper nozzle block 3 are fixed on the continuous casting tundish ; The middle part of the upper and lower nozzles is a combination of the upper slide 4 and the lower slide 5; the lower part is installed with the lower nozzle seat brick 6 and the lower nozzle 7. The key part of the double slide sliding nozzle is to use the upper and lower two slides to slide, namely the upper slide 4. The lower sliding plate 5 forms a "four-layer" structure. The sliding nozzle adopts a double sliding plate structure. The double sliding plates are arranged up and down and combined with each other. According to their positions, they are divided into upper and lower sliding plates 4 and 5. The upper and lower sliding plates 4 and 5 are called Double skateboard. The...

Embodiment 2

[0038] A dual-sliding gate, the key parts of the double-sliding gate adopt two upper and lower slides to form a "four-layer" structure, that is, the upper gate 2 and the upper gate seat brick 3 are fixed on the tundish; the middle part is the upper slide 4 and The lower slide plate 5 is combined; the lower part is installed with the nozzle block 6 and the nozzle 7. The upper and lower sliding plates 4 and 5 can slide symmetrically in opposite directions, keeping the center of the nozzle coincident with the center of the hole formed by the sliding plate. see Image 6 , The hole shape of the skateboard hole in this embodiment is square with a side length of 23.5mm, see Picture 11 , The combined holes in the sliding process of the upper and lower slides 4 and 5 are symmetrical squares, and the length of the sides of the square can vary from 0 to 23.5mm; the upper and lower slides 4 and 5 are driven by the linkage mechanism to keep the two synchronized Sliding, adjustable step le...

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Abstract

A sliding nozzle for continuous casting and its method for reducing the drift of the submerged nozzle. The sliding nozzle adopts a double slide plate structure. The double slide plates are arranged up and down and combined with each other. Sliding plate holes are respectively provided, and the upper and lower plates slide regularly under the drive of the linkage mechanism to form a sliding nozzle with a four-layer structure, and a combined hole is formed during the sliding process of the upper and lower plates. Open the upper and lower plates, the molten steel flows from the upper nozzle through the center combination hole of the slides to form a central beam, flows into the lower nozzle and injects into the crystallizer, and starts pouring molten steel continuously; during the pouring process, by adjusting the size of the center combination hole of the double slides To control the flow of molten steel, after the pouring of molten steel in the tundish, the double slides are closed synchronously and symmetrically to cut off the steel flow and stop pouring. The invention can effectively prevent the deflected flow of molten steel, make the flow field of the crystallizer stable and symmetrical, improve the quality of the solidification shell of the cast slab, reduce the probability of nodulation at the nozzle, and is convenient and practical.

Description

Technical field [0001] The invention designs a device for controlling molten steel in the casting process of a continuous casting machine, in particular to a sliding nozzle for continuous casting and a method for reducing the drift of an immersed nozzle, and provides a double slide sliding nozzle to control the flow of high temperature molten steel , And to reduce the drift of the submerged nozzle. Background technique [0002] In continuous casting production, molten steel is injected into the mold from the tundish through the immersion nozzle. At present, there are two methods to control the flow of molten steel into the mold. One is to control the stopper in the tundish, and the other is to rely on the upper part of the immersion nozzle. The sliding nozzle control. [0003] There are many types of nozzles used in the production of iron and steel plants. The anti-deflection nozzles are mainly used to control the flow of molten steel, control the flow state of molten steel, and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/24
Inventor 赵定国高茗王书桓艾立群
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY