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A Method of High-Speed ​​Adjustment of Crystallizer Width in Online Hot State

A crystallizer, high-speed technology, applied in the field of continuous casting, can solve the problems of width adjustment speed limit, hindering productivity, etc., to achieve the effect of eliminating air gap, reducing cutting waste, and shortening adjustment time

Active Publication Date: 2018-06-22
CONTINUOUS CASTING TECH ENG OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] At present, the traditional on-line thermal width adjustment method commonly used in steel mills is based on the theory of billet shrinkage. Due to the influence of air gap and casting resistance, its width adjustment speed is greatly restricted, which hinders the improvement of productivity.

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  • A Method of High-Speed ​​Adjustment of Crystallizer Width in Online Hot State
  • A Method of High-Speed ​​Adjustment of Crystallizer Width in Online Hot State
  • A Method of High-Speed ​​Adjustment of Crystallizer Width in Online Hot State

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Embodiment Construction

[0042] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0043] The setting of the mold width should consider the shrinkage caused by the solidification of molten steel and cooling to room temperature, and the setting of the mold thickness should not only consider the shrinkage but also add a light reduction. According to the composition of steel grades and factors such as continuous casting models, this total shrinkage factor X i It is advisable to take 1.008% ~ 1.025%, and ordinary carbon steel can take 1.013%, so the crystallizer real-time lower mouth width W bi It can be calculated by formula (2):

[0044] W bi =W si ×X i (2)

[0045] Where: W si - width of slab in cold state, mm;

[0046] x i - Slab shrinkage factor, %;

[0047] W bi -Theoretical width of the lower opening of the crystallizer, mm;

[0048] When i=0, it represents the current parameters of the crystallizer;

[0049]...

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Abstract

The invention belongs to the technical field of continuous casting, and in particular provides a method for adjusting the width of a crystallizer in an online hot state at high speed. According to the solidification and shrinkage characteristics of molten steel in the crystallizer, the present invention determines the reasonable mechanism of mold width adjustment or narrowing adjustment, deduces the adjustment limit speed of mold width or narrowing adjustment, and selects the best mold on-line heating according to actual production needs. State high-speed adjustment width parameters. The invention eliminates the air gap between the billet shell and the casting billet during the hot widening or narrowing process, so that the stress on the billet shell is low and uniform, and at the same time, the width or narrowing is improved without reducing the casting speed. speed.

Description

technical field [0001] The invention belongs to the technical field of continuous casting, and in particular provides a method for adjusting the width of a crystallizer in an online hot state at high speed. Background technique [0002] The crystallizer is a key part of the slab continuous casting machine, usually composed of two copper plates on the wide side and two copper plates on the narrow side. The molten steel in the tundish is injected into the crystallizer, and the molten steel is initially condensed into the shape of the billet in the crystallizer, forming a shell with a certain thickness, which is continuously pulled out from the lower mouth of the crystallizer, and enters the secondary cooling zone. Create conditions for its complete solidification in the subsequent secondary cooling area. The shell size of the slab is determined by the cavity size of the mold. The cavity size of the crystallizer during casting is adjusted before casting according to the slab ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/05B22D11/16
CPCB22D11/05B22D11/168
Inventor 陈阳裴国良谢长川宁曙光肖海健周干水幸伟皮利华龚伟
Owner CONTINUOUS CASTING TECH ENG OF CHINA
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