Rapid cooling process for annealing

A rapid cooling and process technology, which is applied in the field of cold-rolled plate production, can solve the problems of poor spray cooling effect, influence, and interference on the normal progress of spray cooling, the effect of spray cooling, etc., and achieve the effect of improving the quality and efficiency of spray cooling

CN113549739AActive Publication Date: 2021-10-26山东一清光亮炉设备有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-10-26

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Abstract

The invention relates to the technical field of cold-rolled sheet production, in particular to a rapid cooling process for annealing, which is realized through a rapid cooling device. The rapid cooling device comprises nozzles, wherein the nozzles comprise main nozzles and auxiliary nozzles, one auxiliary nozzle is arranged between every two adjacent main nozzles, and the main nozzles and the auxiliary nozzles are obliquely arranged above a cold spraying plate; the auxiliary nozzles are located above the rear portions of the spraying directions of the two adjacent main nozzles; and both the main nozzles and the auxiliary nozzles spray a cooling medium to the cold-rolled sheet in an inclined spraying type cold spraying mode, and the spraying pressure of the auxiliary nozzles is 1 / 4-1 / 3 of the spraying pressure of the main nozzles. According to the rapid cooling process, the appearance of a warm (gas) 'barrier layer 'is avoided or reduced to the maximum extent, the cold spraying quality and efficiency are improved, and the influence of 'black holes' of the vortexes of the main nozzles can be supplemented or compensated.
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Description

technical field

[0001] The invention relates to the technical field of cold-rolled plate production, in particular to a rapid cooling process for annealing. Background technique

[0002] Annealing (to eliminate internal stress) is an indispensable process for iron and steel enterprises and crude steel reprocessing enterprises when rolling various types of plates, and "spray cooling" is an indispensable process for annealing equipment. Hot rolling, especially the continuous bright annealing of cold-rolled plates, uses the "spray cooling" process to avoid the "oxidation process" to the greatest extent and obtain the best surface quality. The usual continuous bright annealing equipment at home and abroad, whether it is vertical or horizontal, its "spray cooling" method is "direct injection" spray cooling. After finishing the surface of the plate, in order to achieve the purpose of instant cooling. But this kind of "spray cooling" has a serious defect that the vertical spray c...

Examples

Embodiment 1

[0022] A rapid cooling process for annealing, realized by the following rapid cooling device:

[0023] The rapid cooling device includes a nozzle, and the nozzle includes a main nozzle and a sub-nozzle, and a sub-nozzle is arranged between adjacent main nozzles, and the main nozzle and the sub-nozzle are inclined above the spray cooling plate Setting; the secondary nozzles are positioned behind and above the spraying direction of the adjacent two main nozzles;

[0024] The main steps of rapid cooling are as follows: both the main nozzle and the auxiliary nozzle spray the cooling medium to the cold-rolled sheet in the "oblique spray" spray cooling method, and the injection pressure of the auxiliary nozzle is 1 / 4 of the injection pressure of the main nozzle.

[0025] The spray angle between the main nozzle and the spray cooling plate is 45°.

[0026] The spray angle between the sub-nozzle and the spray-cooled plate is 45°.

Embodiment 2

[0028] A rapid cooling process for annealing, realized by the following rapid cooling device:

[0029] The rapid cooling device includes a nozzle, and the nozzle includes a main nozzle and a sub-nozzle, and a sub-nozzle is arranged between adjacent main nozzles, and the main nozzle and the sub-nozzle are inclined above the spray cooling plate Setting; the secondary nozzles are positioned behind and above the spraying direction of the adjacent two main nozzles;

[0030] The main steps of rapid cooling are as follows: both the main nozzle and the auxiliary nozzle spray the cooling medium to the cold-rolled sheet in the "oblique spray" spray cooling method, and the injection pressure of the auxiliary nozzle is 1 / 3 of the injection pressure of the main nozzle.

[0031] The spray angle between the main nozzle and the spray cooling plate is 30°.

[0032] The spray angle between the sub-nozzle and the spray-cooled plate is 30°.

Embodiment 3

[0034] A rapid cooling process for annealing, realized by the following rapid cooling device:

[0035] The rapid cooling device includes a nozzle, and the nozzle includes a main nozzle and a sub-nozzle, and a sub-nozzle is arranged between adjacent main nozzles, and the main nozzle and the sub-nozzle are inclined above the spray cooling plate Setting; the secondary nozzles are positioned behind and above the spraying direction of the adjacent two main nozzles;

[0036] The main steps of rapid cooling are as follows: both the main nozzle and the auxiliary nozzle spray the cooling medium to the cold-rolled sheet in the "oblique spray" spray cooling method, and the injection pressure of the auxiliary nozzle is 1 / 3 of the injection pressure of the main nozzle.

[0037] The spray angle between the main nozzle and the spray cooling plate is 60°.

[0038] The spray angle between the sub-nozzle and the spray-cooled plate is 60°.