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Double-strand slab continuous casting operation method

A slab continuous casting and double-strand slab technology, which is applied in the field of metallurgy, can solve problems affecting production, achieve the effects of improving operation rate, reducing downtime and maintenance time, and preventing pulling failure accidents

Active Publication Date: 2021-02-02
LIUZHOU IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides an operation method of double-strand slab continuous casting to solve the problem that the production is affected after the flow of the double-strand slab continuous caster is stopped during pouring

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Embodiment Construction

[0040] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention is now described.

[0041] Taking a converter with a tapping capacity of 150t and a double-strand slab caster with cross-sections of 220mm×1250mm and 220mm×800mm to produce SPHC series steel grades as an example, the working method of the present invention includes the following steps:

[0042] T1: Method for safely stopping flow of double-strand slab continuous casting machine during pouring;

[0043] T2: The method of closing and capping the slab continuous casting;

[0044] T3: Method for non-stop local overhaul of double-strand slab caster after closing and capping;

[0045] T4: The method of changing the cross section during pouring of the double-strand slab continuous caster after maintenance;

[0046] T5: the method of re-opening after the flow of the double-strand slab continuous casting machine after changing the cross-secti...

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Abstract

The invention provides a double-strand slab continuous casting operation method. The method comprises the following steps of T1, a method for safely stopping a strand during pouring of a double-strandslab continuous casting machine; T2, an ending and capping method for slab continuous casting; T3, a method of locally overhauling the double-strand slab continuous casting machine without strand stop; T4, a method for changing a section during pouring of the double-strand slab continuous casting machine; and T5, a method for starting another strand after strand stop of the double-strand slab continuous casting machine during pouring. The method for safely stopping the strand during pouring of the double-strand slab continuous casting machine comprises the following steps that A, the superheat degree of a tundish in the melt before strand stop and the strand stop melt is 30 DEG C or more; and B, the strand stop operation is carried out in the middle and late stages of the ladle pouring, the drawing speed is gradually reduced by a gear of 0.05 m / min in the strand stop preparation strand order when 30% of molten steel in a ladle remains. According to the double-strand slab continuous casting operation method, the casting strand production can be safely stopped in a high liquid level state of 50% or more of the tundish, so that the outage overhauling time of the continuous casting machine is effectively shortened, and the operation rate is improved.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to the field of continuous casting of slabs, in particular to an operation method of continuous casting of two-strand slabs. Background technique [0002] In the current conventional slab continuous casting process, once the production stream is interrupted, the production needs to be reorganized after the end of the production. The same is true for the double-strand slab, which seriously affects the production efficiency. [0003] To sum up, the following problems exist in the prior art: the production is affected after the flow of the two-strand slab continuous casting machine stops during pouring. Contents of the invention [0004] The invention provides a double-strand slab continuous casting operation method to solve the problem that the production is affected after the flow of the double-strand slab continuous caster is stopped during pouring. [0005] For this reason, the present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/16B22D11/115B22D11/20B22D11/22B22D41/28
CPCB22D11/115B22D11/16B22D11/20B22D11/22B22D41/28
Inventor 钱学海周从锐胡鳌全唐锡明周博文李西德邓深樊雷阮志勇
Owner LIUZHOU IRON & STEEL
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