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Argon blowing control method and argon blowing control device for continuous casting tundish breathable upper nozzle brick cup

A continuous casting tundish and control method technology, which is applied to manufacturing tools, casting equipment, casting melt containers, etc., can solve the problems of inability to blow and the flow rate of argon blowing is small.

Active Publication Date: 2020-10-27
LAIWU STEEL YINSHAN SECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides an argon blowing control method and an argon gas control device for continuous casting tundish breathable upper nozzle block. The argon blowing control method involved in the present invention is carried out in the tundish baking process Manual control of argon blowing solves the problem of low argon blowing flow rate or inability to blow open in the early stage of argon blowing for ventilated upper nozzle block, and automatically controls argon blowing during the tundish pouring process, setting the tundish to start pouring and stop pouring in the middle of the entire casting process The regular change node of bale weight and the corresponding argon blowing flow rate value, the argon blowing flow rate is adaptively adjusted with the change of tundish weight, which improves the metallurgical effect of argon blowing to remove impurities; the invention also provides an argon gas control system

Method used

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  • Argon blowing control method and argon blowing control device for continuous casting tundish breathable upper nozzle brick cup
  • Argon blowing control method and argon blowing control device for continuous casting tundish breathable upper nozzle brick cup
  • Argon blowing control method and argon blowing control device for continuous casting tundish breathable upper nozzle brick cup

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] An argon blowing control device for the ventilating upper nozzle block of the double-strand slab continuous casting tundish, such as figure 1 , figure 2 , image 3 As shown, it includes control cabinet 1, first-class operation box 2a, second-class operation box 2b, air circuit control unit 3 in control cabinet 1, programmable logic controller PLC 4, air source inlet, air source outlet 1# and air source outlet 2 #, respectively set the first manual ball valve 8a, the second manual ball valve 8b, the third manual ball valve 8c, the air source outlet 1# and the air source outlet 2 at the air source inlet, air source outlet 1# and air source outlet 2# #Through the metal hose, respectively communicate with the air intake pipe 10b of the first-class air-permeable upper nozzle block 9b, and the air-intake pipe 10c of the second-rate air-permeable upper water port block 9c;

[0080] The first-rate operation box 2a and the second-rate operation box 2b are respectively arrange...

Embodiment 2

[0128] As described in Example 1, an argon blowing control method and argon gas control device for the ventilating upper nozzle block of the double-strand slab continuous casting tundish, the difference is that the present invention is used for the double-strand slab continuous casting tundish The argon blowing control method and the argon control device of the breathable upper nozzle seat brick replace the argon blowing refining method of the continuous casting tundish breathable ceramic rod upper nozzle seat brick disclosed in Example 1 of Comparative Document 2 Chinese Patent Document CN106041044A (201610634268.X), Others are the same as Example 1 of Chinese patent document CN106041044A (201610634268.X), including the following steps:

[0129] 1) Apply the argon blowing control device of the present invention for the first time, press the manual button 7c, adopt the manual argon blowing mode, and measure the regular change of the weight of the tundish in the entire casting p...

Embodiment 3

[0152] As described in Example 1, an argon blowing control method and argon gas control device for the ventilating upper nozzle block of the double-strand slab continuous casting tundish, the difference is that the present invention is used for the double-strand slab continuous casting tundish The control device and application method for blowing argon on the breathable upper nozzle block replaces the argon control method disclosed in Example 1 of the comparative document 3 Chinese patent document CN106670445B (201611141850.9) for the argon blowing refining device of the continuous casting tundish, and the others are the same as Chinese patent document CN106670445B (201611141850.9) embodiment 1 is the same, including the following steps:

[0153]1) Applying the argon blowing control device of the present invention for the first time, pressing the manual button 7c, adopting the manual argon blowing mode, measuring the nodes where the weight of the tundish changes regularly from ...

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Abstract

The invention relates to an argon blowing control method and an argon blowing control device for a continuous casting tundish breathable upper nozzle brick cup. The method is mainly characterized in that in the big fire baking process of a baking position of a continuous casting tundish, argon blowing is manually controlled for a breathable upper nozzle brick cup, and the argon blowing flow (baking) is set to be 10-15NL / min; in the pouring process of the continuous casting tundish, argon blowing is automatically controlled, argon blowing is controlled according to the regular change nodes of weighing of the tundish and the corresponding argon blowing flow value, and the argon blowing flow is adaptively adjusted along with the weighing change of the tundish; and the problem that in the pouring process of the tundish, the argon blowing flow of the breathable upper nozzle brick cup in the early stage is small or cannot be blown open is avoided, dynamic and accurate control over the argonblowing flow in the pouring process of the tundish is achieved, and the metallurgical effect of removing inclusions through argon blowing is improved.

Description

technical field [0001] The invention relates to an argon blowing control method and an argon gas control device for continuous casting tundish ventilation upper nozzle block, belonging to the technical field of steelmaking process in iron and steel metallurgy. Background technique [0002] The continuous casting tundish breathable upper nozzle block with argon blowing function forms an annular air curtain above the upper nozzle of the tundish to remove non-metallic impurities in molten steel, suppress slag at the nozzle, improve the quality of the billet, and prevent nodules at the nozzle The purpose of blocking and ensuring the smooth progress of continuous casting production. However, the argon blowing method of the breathable upper nozzle block of the continuous casting tundish in the prior art has the following problems or deficiencies: (1) The argon blowing flow rate of the breathable upper nozzle block is manually controlled, and it is under the condition of low liquid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/117B22D41/58B22D11/16C21C7/072
CPCB22D11/117B22D41/58B22D11/16C21C7/072
Inventor 武光君朱建石磊
Owner LAIWU STEEL YINSHAN SECTION CO LTD