Method for realizing continuous casting plate bank uniform secondary cooling
A secondary cooling and slab technology, applied in the field of slab continuous casting production, can solve problems such as slab quality, and achieve the effect of improving slab quality and uniform distribution
Active Publication Date: 2011-01-19
UNIV OF SCI & TECH BEIJING
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[0007] The purpose of the present invention is to provide a method for realizing uniform cooling in the secondary cooling process of slab continuous casting, and to solve the quality problem of casting slab caused by uneven cooling of continuous casting slab
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[0016] For steel mills, based on the principle of minimum investment to obtain maximum benefit, and considering the minimum technical transformation cost, when optimizing the secondary cooling of the slab continuous casting machine, keep the secondary cooling spray frame unchanged, and focus on the selection of nozzles. Improvements in size and volume. For example, for a medium-thick continuous casting slab (4) with a specification of 1800mm×220mm, since the casting slab is relatively wide, the spray water of the same row of three nozzles (1, 2, 3) can cover the entire casting slab in width. , the three selected nozzles are all flat air-water nozzles, and each nozzle has a spray angle of 110°, and the distance between adjacent nozzles is 450mm.
[0017] use as figure 1 In the arrangement of the nozzles shown, three nozzles (1, 2, 3) in each row are connected to the fixed spray frame (6) through the spray rod (5), and the spray frame (6) is fixed on the casting slab (4) On th...
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The invention belongs to the plate blank continuous casting technical field and relates to a method for carrying out uniform cooling on the surface of the casting blank in the process of plate blank continuous casting, which is realized by an arrangement mode of fan-shaped section nozzles on a secondary cooling area of a continuous casting blank: three nozzles (1.2.3) are arranged in each row in the width direction of the plate blank; the spaces between two adjacent nozzles are the same, wherein the heights of two side nozzles (1.3) apart from the casting blank are the same; the distance of the middle nozzle (2) apart from the surface of the casting blank is higher by 50-150mm than that of the two side nozzles; the three nozzles are all flat gas-water nozzles; when the three nozzles are positioned in the same plane vertical to the direction of jolley; flat water orifices (9) thereof all form a certain included angle with the vertical plane, or the length directions of the three flat water orifices (9) are all parallel to the plane in the direction of a vertical jolley; the side nozzles (1.3) are positioned in the same plane vertical to the direction of the jolley; and the middle nozzle (2) deviates the plane where the two side nozzles are in by a certain range. By the cold state testing of the combination nozzle, the water yield distribution of the nozzle arrangement mode is more uniform and the uniform cooling along the width direction of the plate blank can be realized.
Description
technical field [0001] The invention belongs to the technical field of continuous casting of slabs, and in particular relates to a method for controlling uniform cooling of a casting slab in a secondary cooling zone in continuous casting production, and is mainly applicable to continuous casting of slabs. Background technique [0002] China's continuous casting steel production has made great progress in recent years. According to statistics, in 2008, the continuous casting ratio of national key steel enterprises reached 99.17%. Since the quality of the continuous casting slab determines the quality of the final steel product, how to better control and improve the quality of the slab has always been the research focus of metallurgists at home and abroad. In the continuous casting process, the high operating rate of the casting machine and the high quality of the slab are closely related to the solidification process of the molten steel. The secondary cooling of the continuou...
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IPC IPC(8): B22D11/22
Inventor 刘青王先勇王宝张晓峰窦志超王彬李光辉张文娟
Owner UNIV OF SCI & TECH BEIJING