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Pouring gate capable of adapting to superheat degree of tundish molten steel

A technology of tundish and superheat, which is applied in the direction of casting molten material container, metal processing equipment, casting equipment, etc., can solve the problems of no temperature fluctuation of molten steel in tundish, inability to adjust the temperature of molten steel, and fluctuation of superheat, so as to reduce the center Effects of segregation and porosity, promotion of equiaxed grain growth, and reduction of temperature fluctuation

Active Publication Date: 2018-07-27
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN102228986A discloses a tundish with an electromagnetic heating nozzle, which is formed by installing a special electromagnetic heating nozzle at the bottom of the bag body to form a tundish that can adjust and control the flow temperature of the nozzle; one or more can be installed at the bottom of the bag as required Electromagnetic heating nozzles form a tundish that can independently control the temperature of each nozzle flow; the tundish has high heating efficiency and can independently adjust and control the temperature of each pouring flow to achieve the best casting temperature, prevent nozzle blockage, and achieve low superheat casting 1. The purpose of improving the quality of casting slabs; the tundish can be widely used in metallurgical continuous casting production, especially in the production of multi-strand, multi-strand large-section, and super-large-section continuous casting slabs, but because the electromagnetic heating nozzle can only depyrate molten steel , the molten steel cannot be cooled, and the tundish with electromagnetic heating nozzle provided by this technology cannot adjust the temperature of the molten steel that is too high
There is no solution to these tundish molten steel temperature fluctuations (that is, superheat fluctuations) problems in the existing continuous casting technology announced at present

Method used

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  • Pouring gate capable of adapting to superheat degree of tundish molten steel
  • Pouring gate capable of adapting to superheat degree of tundish molten steel
  • Pouring gate capable of adapting to superheat degree of tundish molten steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] use as figure 1 , figure 2 In the nozzle body shown, 80 annular protrusions 2 are processed on the outer wall of the nozzle body 1, the height H of the annular protrusions 2 is 5 mm, the width A of the annular protrusions 2 is 5 mm, and there is an annular groove between every two annular protrusions 2 Groove 3, the depth H of the annular groove 3 is 5mm, and the width B of the annular groove 3 is 5mm. During the use of the nozzle, due to the double expansion of the cooling surface area, the heat dissipation speed of the nozzle to the air is doubled, which can solve the problem of intermediate The problem of high temperature of molten steel.

[0037] Use as shown in the figure image 3 , Figure 4 , Figure 5 , Figure 6 As shown in the nozzle jacket 5, the length of the nozzle jacket 5 is 70% of the length of the nozzle body 1, and the material of the nozzle jacket 5 is asbestos board, and the asbestos content in the asbestos board is 70%, and the cross section o...

Embodiment 2

[0044] use as figure 1 , figure 2 In the nozzle body shown, 20 annular ridges 2 are processed on the outer wall of the nozzle body 1, the height H of the annular ridge 2 is 15 mm, the width A of the annular ridge 2 is 5 mm, and there is an annular groove between every two annular ridges 2 Groove 3, the depth H of the annular groove 3 is 15mm, and the width B of the annular groove 3 is 5mm. During the use of the nozzle, because the cooling surface area is enlarged by 3 times, the heat dissipation speed of the nozzle to the air is increased by 3 times, which can solve the problem of intermediate The problem of high temperature of molten steel.

[0045] Use as shown in the figure image 3 , Figure 4 , Figure 5 , Figure 6 As shown in the nozzle jacket 5, the length of the nozzle jacket 5 is 10% of the length of the nozzle body 1. The material of the nozzle jacket 5 is asbestos board, and the asbestos content in the asbestos board is 85%. The cross section of the nozzle ja...

Embodiment 3

[0052] Others are the same as embodiment 1. The difference is:

[0053] use as figure 1 , figure 2 In the nozzle body shown, 40 annular protrusions 2 are processed on the outer wall of the nozzle body 1, the height H of the annular protrusions 2 is 10 mm, the width A of the annular protrusions 2 is 5 mm, and there is an annular groove between every two annular protrusions 2 Groove 3, the depth H of the annular groove 3 is 10mm, and the width B of the annular groove 3 is 5mm. During the use of the nozzle, because the cooling surface area is expanded by 2 times, the cooling speed of the nozzle to the air is increased by 2 times, which can solve the problem of intermediate The problem of high temperature of molten steel.

[0054] use as image 3 , Figure 4 , Figure 5 , Figure 6 As shown in the nozzle jacket 5, the length of the nozzle jacket 5 is 20% of the length of the nozzle body 1. The material of the nozzle jacket 5 is an asbestos board, and the asbestos content i...

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Abstract

The invention belongs to the technical field of iron and steel metallurgy, and particularly relates to a pouring gate capable of adapting to the superheat degree of tundish molten steel. The pouring gate is composed of a pouring gate body and a pouring gate sleeve; the pouring gate sleeve can be assembled on the pouring gate body and can also be disassembled from the pouring gate body; the pouringgate body can achieve common pouring gate functions and the pouring gate heat dissipation accelerating effect; the pouring gate sleeve can achieve the pouring gate heat dissipation delaying effect; and pouring gate body and the pouring gate sleeve can cooperatively achieve the effect of adjusting the superheat degree of the tundish molten steel. By increasing or decreasing the number of the pouring gate sleeve fixed to the outer wall of the pouring gate, the heat dissipation speed of the pouring gate can be increased or decreased, the casting blank quality is improved, and the yield of a casting machine is increased.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, in particular, the invention relates to a nozzle capable of adapting to the superheat of molten steel in a tundish. Background technique [0002] The proper superheat of the molten steel in the continuous casting tundish is an important factor to ensure the stability of the steelmaking-continuous casting process and the quality of the slab. The structure of the slab is dense, which is beneficial to reduce the segregation and looseness of the slab center, improve the quality of the slab and increase the output of the casting machine. When the temperature of the molten steel in the tundish is too high, the development of columnar grains in the continuous casting slab will be aggravated, resulting in serious center segregation problem, it will also make the slab shell thinner and increase the risk of leaking. On the contrary, the temperature of the molten steel in the tundish is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/60
CPCB22D41/60
Inventor 刘洪银赵立峰陈永生亓福川路峰孙建卫亓伟伟王利郝帅
Owner SHANDONG IRON & STEEL CO LTD
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