Method for end capping of slab continuous casting
A technology of slab continuous casting and slab tailing, which is applied in the field of slab continuous casting closing and capping, which can solve the problems of tail slabs not being able to be pulled, so as to prevent pulling accidents and reduce the time for closing and capping
Active Publication Date: 2021-12-10
LIUZHOU IRON & STEEL
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Problems solved by technology
[0004] The invention provides a slab continuous casting finishing and capping method to solve the problem that the tail slab cannot be easily pulled when the slab continuous casting is closed and capped
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[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.
[0034] The invention includes a method for safely stopping the flow of a two-strand slab continuous casting machine during casting before the slab continuous casting is closed and capped, also known as an operation method for a planned stop of flow at a high liquid level in the tundish under the pouring state, and the two-strand slab continuous casting The method of safe stop flow of the machine during pouring includes:
[0035] (1) The superheating degree of the tundish of the first furnace and the stopped furnace should be above 30°C, so as to avoid the temperature of the tundish being too low due to cold steel at the bowl of the upper nozzle, and the stopper rod cannot be closed.
[0036] (2) The stop flow operation should be in the middle and later stages of ladle...
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Abstract
The invention provides a method for finishing and capping slab continuous casting, which includes: the superheat of the tundish of the first furnace and the furnace of the stopped flow should be above 30°C, so as to avoid the cold steel and stopper rods in the bowl of the upper nozzle. Close; stop flow operation is in the middle and late stage of ladle pouring, when the amount of molten steel in the ladle is 30%, it starts to gradually reduce the casting speed at the level of 0.05m / min for the flow times to be stopped, and when the ladle is finished pouring Decrease to 0.2-0.3m / min; plan to stop pouring after the large ladle is poured, and the new ladle is transferred to the pouring position, and do not start pouring; plan to stop production and maintain the flow rate of 0.1-0.3m / min The other stream maintains the normal casting speed. When the liquid level of molten steel in the tundish drops to 50% of the normal production height, close the stopper rod and use the tundish safety plug used to stop the flow of the double-strand slab continuous caster to stop the low-drawing Rapid production. The invention can accelerate the solidification of the molten steel in the crystallizer, reduce the time for closing and capping, and prevent the failure of pulling accidents.
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 finishing and capping slab continuous casting. Background technique [0002] After the casting flow is stopped, it is necessary to carry out the closing and capping operation, but in this process, accidents that the tail billet cannot be pulled are prone to occur. [0003] To sum up, the following problems exist in the prior art: when the continuous casting of slabs is closed and capped, accidents that the tail slabs cannot be pulled are prone to occur. Contents of the invention [0004] The invention provides a slab continuous casting finishing and capping method to solve the problem that the tail slab cannot be pulled easily when the slab continuous casting is closed and capped. [0005] For this reason, the present invention proposes a method for finishing and capping slab continuous casting, and the method for finishi...
Claims
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IPC IPC(8): B22D11/16B22D11/22B22D41/46
CPCB22D11/16B22D11/22B22D41/46
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