Device and method for reducing pressing-in of iron sheet ash during strip steel production through hot tandem rolling unit

Abstract

The invention relates to a device and method for reducing pressing-in of iron sheet ash during strip steel production through a hot tandem rolling unit. The device for reducing pressing-in of the ironsheet ash during strip steel production through the hot tandem rolling unit comprises two sets of inlet lateral water spraying devices arranged at an inlet of a finishing mill, one set of outlet lateral water spraying device arranged at an outlet of the finishing mill, a dust removal water spraying device, an ash blocking plate and an upper guide plate structure. The inlet lateral water sprayingdevices blow and sweep strip steel, and the outlet lateral water spraying device blows and sweeps the strip steel. The dust removal water spraying device is composed of a plurality of dust removal spray nozzles, and water sprayed by the dust removal water spraying device is sprayed on the lower surface of the strip steel. The ash blocking plate is welded to the front portion of an upper guide plate at the inlet of the finishing mill, a composite plate is welded to each of the lower portions of the upper guide plates at the outlet and the inlet of the finishing mill, and the anti-corrosion function is additionally achieved. According to the device and method for reducing pressing-in of the iron sheet ash during strip steel production through the hot tandem rolling unit, through blocking andblow-sweeping, pressing-in of foreign matter in the surface of the strip steel is reduced, rust generation is eliminated by additionally achieving the anti-corrosion function, the pressing-in defectof the iron sheet ash is further reduced, and the quality of a strip steel product is improved.

Description

technical field [0001] The invention belongs to the steel rolling technology, in particular to a device and a method for reducing iron sheet dust pressing in when a hot continuous rolling mill produces strip steel. Background technique [0002] During the rolling process of hot-rolled strip steel, there are foreign objects falling from the rolling mill, such as figure 1 As shown, the foreign matter is pressed into the surface of the strip by the rolling mill, 101. Since this foreign matter is only pressed into the surface of the strip, the shape is like a layer of dust ( figure 1 Shown), so it is called iron gray 102. The appearance of this iron dust phenomenon is caused by the falling of oil, dust, rust spots, etc. in the rolling mill. For this reason, this kind of quality defect is called iron dust indentation in the industry, such as figure 2 As shown, the defect can be detected and identified by the online detection equipment 202 installed between the finishing mill 2...

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