Fine descaling device for hot rolling and hot rolling production line
A descaling device and descaling water technology, applied in the field of slab hot rolling, can solve the problems of affecting the stability of finishing rolling and the large temperature drop of intermediate slabs
Active Publication Date: 2021-06-29
SHOUGANG JINGTANG IRON & STEEL CO LTD
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- Abstract
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Problems solved by technology
[0003] The present invention provides a hot rolling fine descaling device and a hot rolling production line to solve or partially solve the The technical problem that the temperature drop is too large and affects the stability of finishing rolling
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[0039] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings. Throughout the specification, unless otherwise specified, terms used herein should be understood as commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, this specification shall take precedence. Unless otherwise specified, various equipment used in the present invention can be purchased from the market or prepared by existing methods.
[0040] Studies have shown that if the temperature drop of the head and tail of the intermediate billet is too large during the fine descaling, it is easy to cause the...
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Abstract
The invention discloses a fine descaling device for hot rolling. The fine descaling device for hot rolling comprises a water collecting pipe, a variable frequency motor, a descaling pump, a minimum flow valve, an inlet header, an outlet header and a pyrometer, wherein the descaling pump is arranged on the water collecting pipe; the variable frequency motor is connected with the descaling pump; the minimum flow valve is arranged on a branch pipe at the outlet of the descaling pump; the water header is connected with the inlet header through an inlet injection valve and connected with the outer header through an outlet injection valve; and the pyrometer is used for detecting the temperature of an intermediate billet. The fine descaling device is connected with a controller. The controller is used for reducing the descaling water pressure of the inlet header and the outlet header before the head of the target intermediate billet passes through the inlet header, increasing the descaling water pressure of the inlet header and the outlet header after the head of the target intermediate billet passes through the inlet header, and opening the minimum flow valve and closing the outlet injection valve when the temperature of the tail of the target intermediate billet is lower than a preset temperature. The fine descaling device can avoid decrease of finish rolling stability caused by excessive temperature drop of the head and the tail of the intermediate billet.
Description
technical field [0001] The application relates to the technical field of slab hot rolling, in particular to a hot rolling fine descaling device and a hot rolling production line. Background technique [0002] In the hot rolling production process, after the slab is heated by the heating furnace, the primary iron oxide scale produced on the surface of the slab due to heating is removed by descaling before rough rolling, and then the slab is rough rolled by the rough rolling mill for multiple passes to obtain The intermediate slab (or intermediate slab), during the rough rolling process, secondary oxide scales are produced on the surface of the intermediate slab, so before the intermediate slab enters the finishing rolling unit for finishing rolling, it is necessary to remove the secondary oxidation on the surface of the intermediate slab by a finishing descaling device Iron sheet. However, some intermediate billets are particularly sensitive to the use of descaling water, es...
Claims
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IPC IPC(8): B21B45/08
CPCB21B45/08Y02P70/10
Inventor 张维中张泽朋吕进伟张宏杰李万京崔俊坡
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD