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The method of re-opening the flow of the double-strand slab continuous casting machine after the flow is stopped during pouring

A technology of slab continuous casting machine and double-strand slab, which is applied in the field of metallurgy and continuous casting, and can solve the problems that production cannot be restarted again

Active Publication Date: 2021-09-14
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 a method for re-opening a double-strand slab continuous casting machine after the flow is stopped during pouring, so as to solve the problem that the production cannot be restarted again in the same tundish once the production of the casting strand is stopped

Method used

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  • The method of re-opening the flow of the double-strand slab continuous casting machine after the flow is stopped during pouring
  • The method of re-opening the flow of the double-strand slab continuous casting machine after the flow is stopped during pouring
  • The method of re-opening the flow of the double-strand slab continuous casting machine after the flow 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] 1. Double-strand slab continuous casting machine stops flow safely during pouring

[0042] When the 220mm×800mm flow in the double flow needs to stop production due to production requirements or equipment failure, the operation of stopping flow at high liquid level in the tundish under the pouring state is as follows:

[0043] (1) The superheat of the tundish of the first furnace before the planned shutdown and the shutdown furnace is raised to above 30°C, so as to prevent the temperature of the tundish from being too low and the bowl of the upper nozzle to be cold steel, and the stopper rod cannot be closed.

[0044] (2) The stop-flow operation is carried out in the middle and late stages of ladle pouring in the stop-flow furnace. When the molten steel in the ladle is 30% left in the pouring furnace, the flo...

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Abstract

The invention provides a method for re-opening a double-flow slab continuous casting machine after stopping the flow during pouring. , a total of 3 pieces, the impact plate in the middle is located just below the large ladle steel flow vertically entering the tundish; the left and right two pieces are located at the impact point of the steel flow when using the curved nozzle; in production, a certain flow needs to be stopped successfully due to failure or maintenance. And after the finishing operation is started, the pulling speed of another stream is increased to the upper limit of the steel grade and temperature to maintain production. The invention can realize the re-opening of the flow after the flow is stopped.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to the field of continuous casting, in particular to a method for re-opening a two-strand slab continuous casting machine after the flow is stopped during casting. Background technique [0002] In the conventional slab continuous casting production, whether it is a single-strand slab continuous casting machine or a double-strand slab continuous casting machine, once the casting strands stop production, the production cannot be restarted again in the same tundish. [0003] To sum up, the following problems exist in the prior art: once the slab continuous casting machine and the casting stream stop production, the production cannot be restarted again in the same tundish. Contents of the invention [0004] The invention provides a method for re-starting a double-strand slab continuous casting machine after the flow is stopped during pouring, so as to solve the problem that the production ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/18B22D41/00B22D41/16B22D41/50
CPCB22D11/18B22D41/00B22D41/16B22D41/50
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