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Long nozzle for pouring basket metallurgy and application thereof

A long nozzle and tundish technology, which is applied in the field of iron and steel metallurgy, can solve the problems of insufficient time for alloy elements to fully diffuse, uneven distribution, and late addition time, and achieve the effects of improving stable yield, uniform distribution, and enhanced efficiency

Active Publication Date: 2010-03-03
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of rare earth, calcium, magnesium and other elements by this method also has the following disadvantages: (1) the addition time is late, and the alloy elements do not have time to fully diffuse in the crystallizer, and the distribution is uneven
(2) This method has a limit value requirement for the minimum thickness of the continuous casting slab, and the application on the middle slab will cause defects and cause the steel plate to be scrapped

Method used

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  • Long nozzle for pouring basket metallurgy and application thereof
  • Long nozzle for pouring basket metallurgy and application thereof
  • Long nozzle for pouring basket metallurgy and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In this embodiment, the position of the through hole 2 of the shroud for metallurgy in the tundish is 100 mm from the top of the shroud, the number of the through hole 2 is 1, the diameter of the hole located on the inner wall of the shroud is 10 mm, and the length is 10 mm, and the hole located on the outer wall of the shroud The diameter is 20mm, the axial direction of the through hole and the axial direction of the upper long nozzle form an included angle of 10°, the outer diameter of the front part of the joint 5 is 20mm, and the inner diameter is 10mm.

[0021] When used to remove small inclusions, the steps are as follows:

[0022] A two-strand slab continuous casting machine is adopted, the section of the casting slab is 1150×230mm, and the casting speed is 1.2m / min. Connect the metal hose (external delivery pipe) 6 to the gas source, blow in argon, the gas supply pressure is 2 atm, and the flow rate is 50 l / min. The argon gas is fully dispersed by the stream in...

Embodiment 2

[0024]In this embodiment, the position of the through hole 2 of the shroud for metallurgy in the tundish is 160 mm from the top of the shroud, and the number of the through holes 2 is 2, distributed along the radial direction of the shroud, and the angle between the two through holes 2 is 180°. The diameter of the hole located on the inner wall of the shroud is 8 mm, and the length is 12 mm. The diameter of the hole located on the outer wall of the shroud is 30 mm. 30mm with an inner diameter of 25mm.

[0025] When used to remove fine inclusions, the following steps are included:

[0026] A two-strand slab continuous casting machine is adopted, the section of the casting slab is 1150×230mm, and the casting speed is 1.2m / min. Connect the metal hose (external delivery pipe) 6 to the gas source, blow in argon, the gas supply pressure is 6 atm, and the flow rate is 300 l / min. The argon gas is fully dispersed by the stream in the shroud, and a large number of dispersed micro-bubb...

Embodiment 3

[0028] In this embodiment, the number of shroud through-holes 2 for metallurgy in the tundish is six, which are asymmetrically and arbitrarily distributed along the shroud space. The position of the uppermost through hole 2 is 80mm from the top of the long nozzle, and the position of the lowermost through hole 2 is 500mm from the top of the nozzle. The hole located on the inner wall of the shroud has a diameter of 25 mm and a length of 0 mm, and the hole located on the outer wall of the shroud has a diameter of 25 mm and a length of 60 mm. The axial direction of the through hole 2 forms an included angle of 40° with the axial direction of the upper part of the shroud, and the outer diameter of the front part of the joint 5 is 25 mm, and the inner diameter is 14 mm.

[0029] When used to remove fine inclusions, the following steps are included:

[0030] A two-strand slab continuous casting machine is adopted, the section of the casting slab is 1150×230mm, and the casting speed...

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Abstract

The invention provides a long nozzle for pouring basket metallurgy and the application thereof; the long nozzle comprises a nozzle body, a through hole is arranged on the wall of an upper part of thenozzle and is connected with an external conveying pipe by a joint, and the axial direction of the through hole and the axial direction of the upper part of the nozzle form 10-90 degrees. The long nozzle can effectively control non-metallic inclusion in molten steel, accurately control and regulate the content of trace elements in molten steel and produce fine oxides to disperse steel; the long nozzle has simple structure and rational design, and has high efficiency on removing fine oxides and can slow down the blocking phenomenon of a pouring basket submersed nozzle; the long nozzle can control extra particle quantity , has high hit rate to trace alloy elements and uniform ingredients; by adopting the long nozzle, various beneficial additives are added in the steel, and the application isstrong, the operation is simple and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and relates to tundish metallurgy technology, in particular to a shroud for realizing tundish metallurgy and a method for using the shroud to realize tundish metallurgy. Background technique [0002] With the further development of the steel industry, the design of steel materials and the development of application technology have brought great challenges to the metallurgical industry. Iron and steel products will be developed in the direction of high cleanliness of molten steel, high precision of component control and high stability of product performance. The key to improving the quality of steel products and producing high-performance steel products is to improve the purity of molten steel, precisely control the composition of molten steel, and effectively utilize fine inclusions in molten steel. At present, the refining technology of pure steel, the production of fine oxide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/50B22D41/58B22D11/117
Inventor 唐复平李镇王晓峰刘万山任子平陈明王文仲孟劲松温铁光姜振生吴春杰陈本文康伟金学峰栗红李海滨林洋苏毅费鹏孙群袁皓孙涛王向辉
Owner ANGANG STEEL CO LTD
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