Secondary-cooling water distribution method for improving macrosegregation of continuous casting blank
A secondary cooling and macro-segregation technology, applied in the field of metallurgy, can solve the problems of high production and maintenance costs, and achieve the effects of accelerating the solidification of molten steel, improving segregation, and reducing the time for separation and crystallization
Active Publication Date: 2017-01-04
CISDI ENG CO LTD
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Problems solved by technology
This method is a commonly used technology, but it also has the problem of high production and maintenance costs
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[0016] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0017] As shown in the figure, the secondary cooling water distribution method for improving the macro-segregation of the continuous casting slab in the present invention is to increase the water volume on the outer arc side of the arc section and the straightening section of the secondary cooling zone. Specifically, increasing the amount of water on the outer arc side of the arc section and the straightening section can speed up the solidification of molten steel and reduce the segregation elements for selection without changing the temperature of the outer arc of the billet in the bending section and the temperature of the inner arc of the billet in the straightening section. Minute crystallization time, so as to achieve the effect of improving the segregation situation.
[0018] As a further improvement of the above scheme, the water vol...
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The invention discloses a secondary-cooling water distribution method for improving macrosegregation of a continuous casting blank. The method is specifically used for increasing the water volumes of outer arc sides of an arc-shaped section and a straightening section of a secondary-cooling area and decreasing the water volume of the outer arc side of a horizontal section of the secondary-cooling area. According to the secondary-cooling water distribution method, the water volumes of the outer arc sides of the arc-shaped section and the straightening section are increased, the temperature of an outer arc of a casting blank body on the bent section and the temperature of an inner arc of a casting blank body on the straightening section are not changed, meanwhile, molten steel solidification is accelerated, and the time for segregation elements to conduct select crystallization is shortened, so that the effect of improving the segregation condition is achieved; and meanwhile, the water volume of the outer arc side of the horizontal section is decreased, so that the uniformity of the temperature of the inner arc and the uniformity of the temperature of the outer arc of the casting blank are improved, and the phenomenon that the casting blank is bent after being discharged out of a fan-shaped section due to thermal stress is effectively avoided.
Description
technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a secondary cooling water distribution method for improving macro-segregation of continuous casting slabs. Background technique [0002] Continuous casting is a process in which molten steel is gradually cooled into a solid billet with the outward transmission of heat. Due to the phenomenon of selective crystallization of segregated elements such as carbon, manganese, phosphorus, and sulfur in liquid molten steel during the solidification process, that is, segregated elements The solubility in liquid steel is greater than that in solid billets, resulting in the accumulation of segregated elements in unsolidified liquid steel, and the content of segregation elements in the later solidified molten steel is higher than that of the first solidified molten steel, resulting in macro segregation. Macro-segregation will affect the pass rate of the subsequent rolling materi...
Claims
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Login to View More IPC IPC(8): B22D11/22
CPCB22D11/225
Inventor 刘强韩志伟孔意文邓比涛
Owner CISDI ENG CO LTD