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Method for plugging dummy bar head

A dummy head and the fourth technology, applied in the field of continuous casting of stainless steel billets, can solve the problems of long blocking dummy time, affecting the surface quality of the stainless steel billet in the antegrade process, and breaking out of continuous casting and casting. The filling state is good, the strength is guaranteed, and the cooling effect is uniform

Inactive Publication Date: 2010-11-24
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Because the temperature and fluidity of molten stainless steel are significantly different from those of carbon steel, in the actual production process, not only the dummy ingot is blocked for a long time, but also the phenomenon of continuous casting leakage occurs from time to time, which seriously affects the continuous casting production process. Conduction and Surface Quality of Stainless Steel Billets

Method used

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Examples

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Embodiment

[0019] Embodiment: The billet in this example is a 220×220mm crystallizer, figure 1 As shown, during the period of stopping pouring for changing steel grades, follow the steps below to block the dummy head:

[0020] 1. Put the dummy head in the middle of the crystallizer, and use a steel braze to plug the asbestos rope into the gap between the dummy head and the crystallizer (called blocking the gap between the dummy head and the crystallizer) to ensure The plugging surface and the head of the dummy rod are smooth and dense;

[0021] 2. Sprinkle nail chips 4 with a thickness of 12mm on the asbestos rope, the corners of the copper tube of the crystallizer and the upper part of the dummy head to ensure that the billet head is solidified evenly, which is conducive to smooth ingot removal;

[0022] 3. Place a layer of spring 1 on the bottom layer of the groove where the copper tube of the crystallizer connects with the hook head, and the spring 1 is perpendicular to the copper tu...

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Abstract

The invention belongs to the field of stainless steel billet continuous casting production, and in particular relates to a method for plugging a dummy bar head. The method comprises the following steps of: 1, plugging a gap between the dummy bar head and a crystallizer by using an asbest rope; 2, spreading nail scraps with thickness of 10 to 15mm over the upper part of the dummy bar head and the copper pipe corner part of the crystallizer; 3, putting a first layer of springs on the bottommost layer in a groove of the dummy bar head in a direction perpendicular to the copper pipe of the crystallizer; 4, overlaying a second layer of springs on the groove, wherein the second layer of springs are crossed with the first layer of springs; 5, putting a third layer of springs which are parallel to the first layer of springs; and 6, putting a fourth layer of springs which are parallel to the second layer of springs. The method can guarantee the strength of cold materials and prevent partial collapse; meanwhile, a molten steel flowing channel is formed by using shape of the spring to help to control molten steel flowing direction. The method has the advantages of uniformly cooling a billet head and avoiding accidents of decoupling at the start and bleeding out in gating practice along with good molten steel filling state in the dummy bar head.

Description

technical field [0001] The invention belongs to the field of stainless steel billet continuous casting production, and in particular relates to a method for sealing a dummy head. Background technique [0002] At present, the method of sealing the dummy head by continuous casting of stainless steel billet adopts the method of sealing the dummy head by continuous casting of carbon steel billet, mainly using asbestos rope or asbestos board to fill the gap between the dummy head and the crystallizer, Place nail chips, cold steel bars, pouring cups and other cooling materials above to speed up the solidification speed of molten steel during pouring. [0003] Because the temperature and fluidity of molten stainless steel are significantly different from those of carbon steel, in the actual production process, not only the dummy ingot is blocked for a long time, but also the phenomenon of continuous casting leakage occurs from time to time, which seriously affects the continuous ca...

Claims

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Application Information

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IPC IPC(8): B22D11/08
Inventor 张润平
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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