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Slab seal dummy ingot method for preventing break-out of steel

A slab and breakout technology, which is applied in the field of slab sealing and starting ingots to prevent breakout at the start, can solve problems such as breakout and uneven distribution of cold iron, achieve good capping effect, avoid adhesion, and have remarkable effects

Inactive Publication Date: 2011-03-30
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has low requirements for the operator and is easy to master, but there is still the problem of uneven distribution of cold iron, and steel breakout and pouring failure will still occur due to the composition and temperature of molten steel.

Method used

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  • Slab seal dummy ingot method for preventing break-out of steel
  • Slab seal dummy ingot method for preventing break-out of steel
  • Slab seal dummy ingot method for preventing break-out of steel

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Embodiment Construction

[0017] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0018] See figure 1 , a method for blocking the dummy head 1 with a slab that prevents start-up breakout when the casting blank is 200mm thick, the method may further comprise the steps:

[0019] 1) Use a paper rope 5 to block the gap between the dummy head 1 and the crystallizer 6;

[0020] 2) Evenly spread a layer of pins 7 on the bottom of the dovetail groove 2 of the dummy head 1 and the surface of the dummy head 1;

[0021] 3) Evenly spread a layer of short springs 4 on the bottom of the dovetail groove 2, and then place a layer of short springs 4 until the bottom of the dovetail groove 2 is filled;

[0022] 4) Arrange short springs 4 and long springs 3 on the surface of the dummy head regularly until the surface of the dummy head 1 is covered.

[0023] The material of the spring is made of Q235B steel to replace the cold iron block. The w...

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Abstract

The invention provides a slab seal dummy ingot method for preventing break-out of steel, sequentially comprising the following steps of: (1) plugging a gap between a dummy bar head and a crystallizer with a paper string; (2) evenly paving a layer of pins at the bottom of a dovetail groove of the dummy bar head and the surface of the dummy bar head; (3) evenly paving a layer of springs at the bottom of the dovetail groove, vertically placing a layer of springs until the bottom of the dovetail groove is filled flatly; and (4) regularly placing springs on the surface of the dummy bar head until the surface of the dummy bar head is filled, wherein the spring is made of QB steel, the ratio of the wire diameter to the pitch is 1:2 and the size of the spring is designed according to the size of the dovetail groove. The invention has the advantages that molten steel is evenly cooled in the dovetail groove, has good capping function and can remove the dummy ingot successfully to avoid conglutination, and the spring improves the surface tension of the molten steel to further reduce the break-out of steel and has remarkable effect.

Description

technical field [0001] The invention belongs to the technical field of iron and steel continuous casting, and in particular relates to a new technology for sealing dummy ingots with slabs for preventing breakout at the start. Background technique [0002] Plugging the dummy head is a key operation step in continuous casting production. At present, cold iron and pins are often used to seal the dummy head during continuous casting. The purpose is to make the molten steel solidify quickly and not stick to the dummy head dovetail groove. Welded together, but due to the concentrated placement of cold iron and pins, the molten steel is not cooled uniformly when it enters the dovetail groove of the dummy head, and steel breakout is prone to occur at the start, and the uneven distribution of the pins makes the molten steel and the dummy head stick and weld dead When the dummy is removed, the dummy head and the billet are not easy to separate, which affects production. Chinese paten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/08
Inventor 李超王军王金辉张宏亮吴亚新刘清海吴德涛张立夫殷浩方恩俊
Owner ANGANG STEEL CO LTD
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