A molten steel pre-cooling device for high-speed continuous casting machine
A pre-cooling and continuous casting machine technology, applied in the field of molten steel pre-cooling devices, can solve the problems of accelerating the cooling speed of molten steel, high superheating degree of molten steel, and affecting the solidification speed, etc., to reduce the precipitation of harmful substances, increase the casting speed, The effect of accelerating the solidification speed
Active Publication Date: 2017-03-22
中重科技(天津)股份有限公司
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Problems solved by technology
Therefore, the main reason for restricting the continuous casting casting speed is that the molten steel cools slowly in the crystallizer, and the crusting is slow, and one of the reasons for the slow crusting is that the superheat of the molten steel is too high, which affects the solidification speed.
In the prior art, it is usually to increase the heat transfer efficiency between the mold and the slab to speed up the cooling rate of the molten steel in the mold, but this method cannot solve such technical problems well
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[0015] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0016] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0017] Such as figure 1 As shown, a molten steel precooling device for a high-speed continuous casting machine includes a molten steel precooling barrel 1, a rotating disk 2 and a rotating disk transmission system, and the molten steel precooling barrel 1 is located at the lower part of the tundish 3, and the tundish 3 The molten steel in the molten steel enters the molten steel precooling barrel 1 through the molten steel inlet on the top of the molten steel precooling barrel 1, and the rotating disk 2 is arranged below the molten steel inlet of the molten steel precooling barrel 1 in the molten steel precooling barrel 1. The rotating disk 2 is made of heat-resistant steel, and its ext...
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The invention provides a molten steel pre-cooling device for a high speed continuous casting machine. The molten steel pre-cooling device comprises a molten steel pre-cooling barrel, a rotating disc and a rotating disc transmission system; the rotating disc is arranged in the molten steel pre-cooling barrel, the rotating disc transmission system is connected with the rotating disc, and a cooling inert gas inlet is formed in the connecting position of the rotating disc transmission system and the rotating disc; and a gas outlet is formed in the molten steel pre-cooling barrel, a molten steel outlet is formed in the bottom of the molten steel pre-cooling barrel, and the molten steel outlet and a long water opening of a crystallizer are connected. The molten steel pre-cooling device has the beneficial effects that the mechanical power is provided for the rotating disc through the rotating disc transmission system, molten steel is smashed, the temperature of the molten steel drops through heat exchange between the smashed molten steel and the cooling gas to approach to the curing temperature, and the degree of superheat of the molten steel is reduced; and meanwhile, a crystal nucleus of the molten steel is formed, the necessary liquid level is kept at the lower portion of the molten steel pre-cooling barrel, stabilization of molten steel when the molten steel is injected into the crystallizer is guaranteed, the solidification speed of the molten steel in the crystallizer is increased, grain refinement of the molten steel in the crystallizer is quickened, and the steel drawing speed is increased.
Description
technical field [0001] The invention belongs to the field of continuous casting machines, in particular to a molten steel precooling device for high-speed continuous casting machines. Background technique [0002] As we all know, continuous casting equipment generally consists of a ladle, a slewing tower, a tundish, a crystallizer, a secondary cooling section, and a tension leveler. The working principle of continuous casting is: the molten steel provided by the steelmaking workshop is hoisted by the ladle to the turret of the continuous casting machine, and the molten steel is injected into the tundish of the continuous casting machine through the ladle nozzle, and the molten steel in the tundish is discharged through the submerged long nozzle. The molten steel is injected into the mold of the continuous casting machine, and the molten steel is cooled and encrusted in the mold, and then pulled out from the lower end of the mold to form a continuous casting slab. It can be ...
Claims
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IPC IPC(8): B22D11/08
Inventor 田学伯
Owner 中重科技(天津)股份有限公司