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Protecting pouring method of crystallizer feeding steel belt

A technology for protecting pouring and crystallizer, which is applied in the field of continuous casting, and can solve problems such as quality accidents, easy solidification of mold slag, unfavorable protection pouring, etc.

Active Publication Date: 2015-02-04
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if a sleeve is added around the steel belt, the inner area of ​​the sleeve is continuously fed with the steel belt, causing the temperature in the sleeve to be too low, and the mold slag is easy to solidify, which is not conducive to protective pouring. ACCIDENT

Method used

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  • Protecting pouring method of crystallizer feeding steel belt
  • Protecting pouring method of crystallizer feeding steel belt

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Embodiment 1

[0028] Such as figure 1 with figure 2 As shown, molten steel 8 is housed in the crystallizer 1 , and the baffle plate 3 divides the crystallizer 1 into a feeding area 6 and a common area 7 . Mold flux 2 is used in feeding zone 6 and common zone 6. When the feeding steel strip 5 is added to the molten steel 8, hollow refractory balls 4 are added in the feeding area, and the hollow balls are distributed in the mold slag 2 in various states, forming a mixed accumulation layer with the mold slag 2 .

[0029] A protective pouring method for feeding a steel strip in a crystallizer, said method comprising the following steps:

[0030] 1) Use the baffle to divide the crystallizer liquid level into feeding area and common area;

[0031] 2) When feeding the steel belt in the crystallizer, add mold slag in the common area and the feeding area, and then add hollow refractory balls in the feeding area;

[0032] The cast steel type is Q345B, the width of the fed steel strip is 10-20% o...

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Abstract

The invention discloses a protecting pouring method of a crystallizer feeding a steel belt. The method comprises the following steps that (1) the liquid surface of the crystallizer is divided by a baffling board into a feeding area and a normal area, (2) when the crystallizer feeds the steel belt, casting powder is added in the normal area and the feeding area, hollow fireproof material balls are added in the feeding area, the width of the steel belt fed by the crystallizer is 10-20% of the width of the crystallizer, the thickness of the steel belt is 0.1-1% of the length of the crystallizer, and the feeding speed is 0.3-0.6m / s. The method is low in cost, simple and effective.

Description

technical field [0001] The invention belongs to the technical field of continuous casting, and in particular relates to a protective pouring method for a crystallizer feeding steel strip. Background technique [0002] Compared with the traditional mold casting process, the continuous casting process is a major technological progress, but inherent product defects such as low equiaxed crystal ratio, center segregation, center looseness and center cracks restrict the quality of continuous casting products. Similar to the wire feeding of the crystallizer, the steel belt feeding is to insert an ordinary carbon steel belt into the mold, and make the steel belt vibrate, and use the melting and heat absorption of the steel belt in the melt to change the temperature field of the melt in the mold. Reducing the superheat and temperature field gradient of the melt in the crystallizer, and at the same time using the mechanical movement of the steel strip to break the dendrite structure, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/108B22D11/111
CPCB22D11/108B22D11/111
Inventor 刘成宝刘美王毅张冠峰韩杰许荣昌
Owner SHANDONG IRON & STEEL CO LTD
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